feat(command): 提供指令别名映射模块，支持将插件内复杂的子指令简化为一个单独的指令，方便玩家使用。

feat(color): ColorParser RGB gradient color support.

.github/workflows/deploy.yml

@@ -26,7 +26,7 @@ jobs:
           server-password: MAVEN_TOKEN
 
       - name: "Maven Deploy"
-        run: mvn -B -Pgithub deploy --file pom.xml -DskipTests
+        run: mvn -B -Pgithub deploy --file pom.xml -DskipTests -Dgpg.skip
         env:
           MAVEN_USERNAME: ${{ github.repository_owner }}
           MAVEN_TOKEN: ${{secrets.GITHUB_TOKEN}}
@@ -42,9 +42,8 @@ jobs:
           java-version: '8'
           distribution: 'adopt'
           cache: maven
-
       - name: "Maven Deploy"
-        run: mvn -B -Plocal deploy --file pom.xml -DskipTests
+        run: mvn -B -Plocal deploy --file pom.xml -DskipTests -Dgpg.skip
 
       - name: "Copy artifacts"
         run: |
@@ -108,3 +107,27 @@ jobs:
           git add -A
           git commit -m "API Document generated."
           git push origin HEAD:gh-pages --force
+
+  central-deploy:
+    name: "Deploy Project (Central)"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: "Set up JDK"
+        uses: actions/setup-java@v2
+        with:
+          java-version: '11'
+          distribution: 'adopt'
+          cache: maven
+          server-id: ossrh
+          server-username: MAVEN_USERNAME
+          server-password: MAVEN_PASSWORD
+          gpg-private-key: ${{ secrets.MAVEN_GPG_PRIVATE_KEY }} # Value of the GPG private key to import
+          gpg-passphrase: MAVEN_GPG_PASSPHRASE # env variable for GPG private key passphrase
+
+      - name: "Central Deploy"
+        run: mvn -B -Possrh deploy --file pom.xml -DskipTests
+        env:
+          MAVEN_USERNAME: ${{ secrets.OSSRH_USER }}
+          MAVEN_PASSWORD: ${{ secrets.OSSRH_PASS }}
+          MAVEN_GPG_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}

.github/workflows/maven.yml

@@ -25,7 +25,7 @@ jobs:
           server-username: MAVEN_USERNAME
           server-password: MAVEN_TOKEN
       - name: "Package"
-        run: mvn -B package --file pom.xml -Dmaven.javadoc.skip=true
+        run: mvn -B package --file pom.xml -Dmaven.javadoc.skip=true -Dgpg.skip
         env:
           MAVEN_USERNAME: ${{ github.repository_owner }}
           MAVEN_TOKEN: ${{secrets.GITHUB_TOKEN}}

README.md

@@ -27,7 +27,7 @@
 
 ## 内容
 
-项目初创不久，加 * 的仍在开发更新中...
+项目初创不久，加 * 的仍在开发更新中...欢迎各路大佬帮助提供本项目的开发文档~
 
 ### 集合部分 (`/collection`)
 
@@ -36,25 +36,54 @@
 
 ### 主要部分 (`/base`)
 
+- Color  [`easyplugin-color`](base/color)
+    - 颜色工具类模块，提供功能全面的MC颜色解析转换工具。
+    - 支持 `&+颜色代码`(原版颜色)、`§(#XXXXXX)`(RGB颜色) 与 `&<#XXXXXX>`(前后标注RGB颜色渐变)。
+- Utils  [`easyplugin-utils`](base/utils)
+    - 通用工具类模块，该模块中的内容支持在Bungee、Bukkit使用。
+    - 本模块提供
+        - `ColorParser` 支持RGB颜色与RGB渐变色的颜色解析器。
+        - `EasyCooldown` 快速创造一个冷却时间的管理器。
+        - `JarResourceUtils` 快速读取Jar包内容的工具类。
 - Main [`easyplugin-main`](base/main)
+    - 主要接口模块，提供了方便的插件入口类与相关工具类。
 - Command [`easyplugin-command`](base/command)
-- ~~Messages*~~ (已独立项目到 [**EasyMessages**](https://github.com/CarmJos/EasyMessages))
-- ~~Configuration~~ (已独立项目到 [**MineConfiguration**](https://github.com/CarmJos/MineConfiguration))
-- ~~Database~~ (已独立项目到 [**EasySQL**](https://github.com/CarmJos/EasySQL))
+    - 指令接口模块，便于快速进行子指令的实现，并提供单独的TabComplete方法。
+    - 随本项目提供了 `SimpleCompleter` 类，用于快速创建补全的内容列表。
 - GUI [`easyplugin-gui`](base/main)
+    - 简单便捷的箱子GUI接口，可以快速实现GUI中不同图标的点击功能。
+    - 随本项目提供了 `AutoPagedGUI` 等翻页GUI抽象类。
+- Storage [`easyplugin-storage`](base/storage)
+    - 抽象存储管理器，便于实现不同的存储类型。
+    - 随本项目提供了 `FileBasedStorage`、`FolderBasedStorage` 等常用存储抽象方法。
+- Messages [`easyplugin-message`](base/messages)
+    - 随本项目提供了基于 MineConfiguration 实现的 `EasyMessages` 类。
+    - 支持多种消息配置，包括文本消息、ActionBar消息、Title消息、声音、粒子效果播放等。
+    - 支持消息间的延迟发送。
+
+### 独立项目部分
+
+> 以下项目均已独立出单独项目,如需使用，**强烈建议自行引用对应的项目**，以支持完整的Javadoc并获取源码内容！
+
+- _Listener_ -> [**EasyListener**](https://github.com/CarmJos/EasyListener)
+- _Configuration_ -> [**MineConfiguration**](https://github.com/CarmJos/MineConfiguration)
+- _Database_ -> [**EasySQL**](https://github.com/CarmJos/EasySQL)
 
 ### 附属部分 (`/extension`)
 
-- [PlaceholderAPI](https://www.spigotmc.org/resources/6245/)* [`easyplugin-placeholderapi`](extension/papi)
+- [PlaceholderAPI](https://www.spigotmc.org/resources/6245/) [`easyplugin-placeholderapi`](extension/papi)
+  - PlaceholderAPI 扩展模块，提供了方便的 PlaceholderAPI 变量注册方法。
 - [Vault](https://github.com/MilkBowl/VaultAPI)* [`easyplugin-vault`](extension/vault)
 
 ## 开发
 
-详细开发介绍请 [点击这里](.documentation/README.md) , JavaDoc(最新Release) 请 [点击这里](https://carmjos.github.io/EasyPlugin) 。
+详细开发介绍请 [点击这里](.documentation/README.md) , JavaDoc(最新Release)
+请 [点击这里](https://carmjos.github.io/EasyPlugin) 。
 
 ### 示例代码
 
-您可以 [点击这里](https://github.com/CarmJos/UltraDepository) 查看实例项目演示，更多演示详见 [开发介绍](.documentation/README.md) 。
+您可以 [点击这里](https://github.com/CarmJos/UltraDepository)
+查看实例项目演示，更多演示详见 [开发介绍](.documentation/README.md) 。
 
 ### 依赖方式
 
@@ -161,7 +190,8 @@ dependencies {
 
 > MIT 协议可能是几大开源协议中最宽松的一个，核心条款是：
 >
-> 该软件及其相关文档对所有人免费，可以任意处置，包括使用，复制，修改，合并，发表，分发，再授权，或者销售。唯一的限制是，软件中必须包含上述版 权和许可提示。
+> 该软件及其相关文档对所有人免费，可以任意处置，包括使用，复制，修改，合并，发表，分发，再授权，或者销售。唯一的限制是，软件中必须包含上述版
+> 权和许可提示。
 >
 > 这意味着：
 > - 你可以自由使用，复制，修改，可以用于自己的项目。

base/color/pom.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>cc.carm.lib</groupId>
+        <artifactId>easyplugin-parent</artifactId>
+        <version>1.5.5</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+    <properties>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
+    </properties>
+    <artifactId>easyplugin-color</artifactId>
+
+    <name>EasyPlugin-Color</name>
+    <description>轻松插件颜色模块，支持简单便捷的颜色解析器，包括基本颜色、RGB颜色与RGB渐变颜色。</description>
+    <url>https://github.com/CarmJos/EasyPlugin</url>
+
+    <developers>
+        <developer>
+            <id>CarmJos</id>
+            <name>Carm Jos</name>
+            <email>carm@carm.cc</email>
+            <url>https://www.carm.cc</url>
+        </developer>
+    </developers>
+
+    <licenses>
+        <license>
+            <name>The MIT License</name>
+            <url>https://opensource.org/licenses/MIT</url>
+        </license>
+    </licenses>
+
+    <issueManagement>
+        <system>GitHub Issues</system>
+        <url>https://github.com/CarmJos/EasyPlugin/issues</url>
+    </issueManagement>
+
+    <ciManagement>
+        <system>GitHub Actions</system>
+        <url>https://github.com/CarmJos/EasyPlugin/actions/workflows/maven.yml</url>
+    </ciManagement>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

base/color/src/main/java/cc/carm/lib/easyplugin/utils/ColorParser.java

@@ -0,0 +1,208 @@
+package cc.carm.lib.easyplugin.utils;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.awt.*;
+import java.util.List;
+import java.util.*;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+/**
+ * 颜色解析器。
+ * <br> 普通颜色 格式 {@code &+颜色代码 }，如 {@literal &c} 、{@literal &a}
+ * <br> RGB颜色(版本需要≥1.14) 格式 {@code &(#XXXXXX) }，如 {@literal &(#aaaaaa)}
+ * <br> 渐变RBG颜色(版本需要≥1.14) 格式 {@code &<#XXXXXX>FOOBAR&<#XXXXXX> }
+ * <p> 注意：当使用渐变RGB颜色时，普通颜色代码与RGB颜色代码将失效。
+ */
+public class ColorParser {
+
+    public static final Pattern HEX_PATTERN = Pattern.compile("&\\(&?#([\\da-fA-F]{6})\\)");
+    public static final Pattern GRADIENT_PATTERN = Pattern.compile("&<&?#([\\da-fA-F]{6})>");
+    public static final Pattern COLOR_PATTERN = Pattern.compile("([&§][0-9a-fA-FrRxX])+"); // 会影响颜色的代码
+    public static final Pattern FORMAT_PATTERN = Pattern.compile("([&§][0-9a-fA-Fk-oK-OrRxX])+"); // MC可用的格式化代码
+
+    /**
+     * 清除一条消息中的全部颜色代码 (包括RGB颜色代码与渐变颜色代码)
+     *
+     * @param text 源消息内容
+     * @return 清理颜色后的消息
+     */
+    public static @NotNull String clear(@NotNull String text) {
+        text = HEX_PATTERN.matcher(text).replaceAll("");
+        text = GRADIENT_PATTERN.matcher(text).replaceAll("");
+        text = COLOR_PATTERN.matcher(text).replaceAll("");
+        return text;
+    }
+
+    /**
+     * 对一条消息进行颜色解析，包括普通颜色代码、RGB颜色代码与RBG渐变代码。
+     *
+     * @param text 源消息内容
+     * @return 解析后的消息
+     */
+    public static @NotNull String parse(@NotNull String text) {
+        return parseBaseColor(parseGradientColor(parseHexColor(text)));
+    }
+
+    /**
+     * 对多条消息进行颜色解析，包括普通颜色代码、RGB颜色代码与RBG渐变代码。
+     *
+     * @param texts 源消息内容
+     * @return 解析后的消息
+     */
+    public static @NotNull String[] parse(@NotNull String... texts) {
+        return parse(Arrays.asList(texts)).toArray(new String[0]);
+    }
+
+    /**
+     * 对多条消息进行颜色解析，包括普通颜色代码、RGB颜色代码与RBG渐变代码。
+     *
+     * @param texts 源消息内容
+     * @return 解析后的消息
+     */
+    public static @NotNull List<String> parse(@NotNull Collection<String> texts) {
+        return texts.stream().map(ColorParser::parse).collect(Collectors.toList());
+    }
+
+    /**
+     * 解析消息中的基本颜色代码格式 {@code &+颜色代码 }，如 {@literal &c} 、{@literal &a}
+     *
+     * @param text 消息内容
+     * @return RGB处理后的消息
+     * @see net.md_5.bungee.api.ChatColor
+     */
+    public static String parseBaseColor(final String text) {
+        return text.replaceAll("&", "§").replace("§§", "&");
+    }
+
+    /**
+     * 解析消息中的RGB颜色代码(版本需要≥1.14) 格式 {@code &(#XXXXXX) }，如 {@literal &(#aaaaaa)}
+     *
+     * @param text 消息内容
+     * @return RGB处理后的消息
+     */
+    public static String parseHexColor(String text) {
+        Matcher matcher = HEX_PATTERN.matcher(text);
+        while (matcher.find()) {
+            text = matcher.replaceFirst(buildHexColor(matcher.group(1)).toLowerCase());
+            matcher.reset(text);
+        }
+        return text;
+    }
+
+    /**
+     * 对一条消息进行RGB渐变处理(版本需要≥1.14)，格式 {@code &<#XXXXXX>FOOBAR&<#XXXXXX> }。
+     *
+     * @param text 消息内容
+     * @return RGB渐变处理后的消息
+     */
+    public static @NotNull String parseGradientColor(@NotNull String text) {
+        List<String> colors = new ArrayList<>();
+
+        Matcher matcher = ColorParser.GRADIENT_PATTERN.matcher(text);
+        while (matcher.find()) colors.add(matcher.group(1));
+
+        if (colors.isEmpty()) return text; // 无渐变颜色，直接跳出
+
+        String[] parts = ColorParser.GRADIENT_PATTERN.split(text);
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < parts.length; i++) {
+            String startHex = i - 1 >= 0 && colors.size() > i - 1 ? colors.get(i - 1) : null; // 本条消息的起始颜色
+            String endHex = colors.size() > i ? colors.get(i) : null; // 本条消息的结束颜色
+            builder.append(gradientText(parts[i], startHex, endHex));
+        }
+
+        return builder.toString();
+    }
+
+    public static @NotNull String gradientText(@NotNull String text,
+                                               @Nullable Color startColor, @Nullable Color endColor) {
+        Objects.requireNonNull(text, "Text to be gradient should not be null!");
+        if (startColor == null || endColor == null || text.isEmpty()) {
+            // 起始颜色有任一为空，则不进行渐变上色。
+            // 若有起始颜色，则代表其跟在某个渐变之后，应当添加"&r"阻断前面的渐变。
+            return (startColor != null ? "&r" : "") + text;
+        }
+
+        // 用于记录消息中特殊格式的位置
+        // 在渐变中，允许使用格式字符与颜色字符来改变其中某个字的颜色/格式，以支持更多形式内容。
+        LinkedHashMap<Integer, String> extraFormats = new LinkedHashMap<>();
+        Matcher matcher = ColorParser.FORMAT_PATTERN.matcher(text);
+        while (matcher.find()) {
+            extraFormats.put(matcher.start(), matcher.group());
+            text = matcher.replaceFirst("");
+            matcher.reset(text);
+        }
+
+        if (text.length() == 1) {
+            // 当只有一个实际字符时，无需进行渐变计算，直接返回 中间颜色+起始格式(如果有)+消息 即可。
+            return colorText(text, extraFormats.get(0), buildHexColor(mediumHex(startColor, endColor)));
+        }
+
+        String[] characters = text.split("");
+        int step = characters.length; // 变换次数
+
+        // 决定每种颜色变换的方向
+        int rDirection = startColor.getRed() < endColor.getRed() ? 1 : -1;
+        int gDirection = startColor.getGreen() < endColor.getGreen() ? 1 : -1;
+        int bDirection = startColor.getBlue() < endColor.getBlue() ? 1 : -1;
+
+        // 决定每种颜色每次变换的度
+        int rStep = Math.abs(startColor.getRed() - endColor.getRed()) / (step - 1);
+        int gStep = Math.abs(startColor.getGreen() - endColor.getGreen()) / (step - 1);
+        int bStep = Math.abs(startColor.getBlue() - endColor.getBlue()) / (step - 1);
+
+        String[] hexes = IntStream.range(0, step).mapToObj(i -> colorToHex(
+                startColor.getRed() + rStep * i * rDirection,
+                startColor.getGreen() + gStep * i * gDirection,
+                startColor.getBlue() + bStep * i * bDirection
+        )).toArray(String[]::new);
+
+        return IntStream.range(0, characters.length)
+                .mapToObj(i -> colorText(characters[i], extraFormats.get(i), buildHexColor(hexes[i])))
+                .collect(Collectors.joining());
+    }
+
+    protected static String gradientText(@NotNull String text, @Nullable String startHex, @Nullable String endHex) {
+        return gradientText(text,
+                startHex == null ? null : Color.decode("0x" + startHex),
+                endHex == null ? null : Color.decode("0x" + endHex)
+        );
+    }
+
+    private static String mediumHex(@NotNull Color start, @NotNull Color end) {
+        return colorToHex(
+                Math.abs(start.getRed() - end.getRed()) / 2,
+                Math.abs(start.getGreen() - end.getGreen()) / 2,
+                Math.abs(start.getBlue() - end.getBlue()) / 2
+        );
+    }
+
+    private static String colorText(String message, @Nullable String format, @Nullable String color) {
+        if (format != null && COLOR_PATTERN.matcher(format).find()) {
+            // format中存在影响颜色的内容，则当前消息的颜色会被覆盖。
+            // 为了减少最终消息的长度，故直接返回键入的FORMAT和对应消息的内容。
+            return format + message;
+        }
+        return (color == null ? "" : color) + (format == null ? "" : parseBaseColor(format)) + message;
+    }
+
+    protected static String colorToHex(Color color) {
+        return colorToHex(color.getRed(), color.getGreen(), color.getBlue());
+    }
+
+    protected static String colorToHex(int r, int g, int b) {
+        // 将R、G、B转换为16进制(若非2位则补0)输出
+        return String.format("%02X%02X%02X", r, g, b);
+    }
+
+    protected static String buildHexColor(String hexCode) {
+        return Arrays.stream(hexCode.split("")).map(s -> '§' + s)
+                .collect(Collectors.joining("", '§' + "x", ""));
+    }
+
+}

base/color/src/test/java/ColorParseTest.java

@@ -0,0 +1,50 @@
+import cc.carm.lib.easyplugin.utils.ColorParser;
+import org.junit.Test;
+
+import java.util.LinkedHashMap;
+import java.util.regex.Matcher;
+
+import static cc.carm.lib.easyplugin.utils.ColorParser.*;
+
+public class ColorParseTest {
+
+
+    @Test
+    public void test() {
+        System.out.println(" ");
+        System.out.println(parseGradientColor("&<#AAAAAA>我真的&<#BBBBBB>爱死&<#111111>你&<#FFFFFF>！"));
+
+        // 测试穿插
+        System.out.println(parse("&<#AAAAAA>&l我&r真&b的&<#BBBBBB>&o爱死&<#111111>你&<#FFFFFF>了&r！"));
+        System.out.println(parse("&<#AAAAAA>&l我&r真&(#666666)的&<#BBBBBB>&o爱死&<#111111>你&<#FFFFFF>了&r！"));
+        System.out.println(parse("&r正常的颜色理应&c&l不受影响&r。"));
+
+        System.out.println(clear("&f测试&<#AAAAAA>清理颜色代码&<#111111> &&这样应该&(#666666)不被影响 &f。"));
+    }
+
+    @Test
+    public void formatReadTest() {
+        LinkedHashMap<Integer, String> formats = new LinkedHashMap<>();
+        String text = "&k&l &m&1我&k爱你爱你爱你&o吗？";
+        Matcher matcher = ColorParser.FORMAT_PATTERN.matcher(text);
+        while (matcher.find()) {
+            String code = matcher.group();
+            formats.put(matcher.start(), code);
+            text = matcher.replaceFirst("");
+            matcher.reset(text);
+        }
+
+        formats.forEach((index, code) -> System.out.println(index + " -> " + code));
+
+        String[] parts = text.split("");
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < parts.length; i++) {
+            String format = formats.get(i);
+            if (format != null) builder.append(ColorParser.parseBaseColor(format));
+            builder.append(parts[i]);
+        }
+
+        System.out.println(builder);
+    }
+
+}

base/command-alias/pom.xml

@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>cc.carm.lib</groupId>
+        <artifactId>easyplugin-parent</artifactId>
+        <version>1.5.5</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+    <properties>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
+    </properties>
+    <artifactId>easyplugin-command-alias</artifactId>
+    <packaging>jar</packaging>
+
+    <name>EasyPlugin-Command-Alias</name>
+    <description>轻松插件指令别名映射模块，支持将插件内复杂的子指令简化为一个单独的指令，方便玩家使用。</description>
+    <url>https://github.com/CarmJos/EasyPlugin</url>
+
+    <developers>
+        <developer>
+            <id>CarmJos</id>
+            <name>Carm Jos</name>
+            <email>carm@carm.cc</email>
+            <url>https://www.carm.cc</url>
+        </developer>
+    </developers>
+
+    <licenses>
+        <license>
+            <name>The MIT License</name>
+            <url>https://opensource.org/licenses/MIT</url>
+        </license>
+    </licenses>
+
+    <issueManagement>
+        <system>GitHub Issues</system>
+        <url>https://github.com/CarmJos/EasyPlugin/issues</url>
+    </issueManagement>
+
+    <ciManagement>
+        <system>GitHub Actions</system>
+        <url>https://github.com/CarmJos/EasyPlugin/actions/workflows/maven.yml</url>
+    </ciManagement>
+
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

base/command-alias/src/main/java/cc/carm/lib/easyplugin/command/alias/AliasCommand.java

@@ -0,0 +1,51 @@
+package cc.carm.lib.easyplugin.command.alias;
+
+import org.bukkit.Location;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.SimpleCommandMap;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+
+public class AliasCommand extends Command {
+
+    protected final AliasCommandManager aliasCommandManager;
+    protected final String targetCommand;
+
+    public AliasCommand(String name, AliasCommandManager aliasCommandManager, String targetCommand) {
+        super(name);
+        this.aliasCommandManager = aliasCommandManager;
+        this.targetCommand = targetCommand;
+    }
+
+    protected SimpleCommandMap getCommandMap() {
+        return this.aliasCommandManager.getCommandMap();
+    }
+
+    protected String buildCommand(String[] args) {
+        return this.targetCommand + " " + String.join(" ", args);
+    }
+
+    @Override
+    public boolean execute(@NotNull CommandSender sender, @NotNull String commandLabel, @NotNull String[] args) {
+        return getCommandMap().dispatch(sender, buildCommand(args));
+    }
+
+    @NotNull
+    @Override
+    public List<String> tabComplete(@NotNull CommandSender sender, @NotNull String alias,
+                                    @NotNull String[] args, @Nullable Location location) throws IllegalArgumentException {
+        return Optional.ofNullable(getCommandMap().tabComplete(sender, buildCommand(args))).orElse(Collections.emptyList());
+    }
+
+    @NotNull
+    @Override
+    public List<String> tabComplete(@NotNull CommandSender sender, @NotNull String alias, @NotNull String[] args) throws IllegalArgumentException {
+        return tabComplete(sender, alias, args, null);
+    }
+
+}

base/command-alias/src/main/java/cc/carm/lib/easyplugin/command/alias/AliasCommandManager.java

@@ -0,0 +1,88 @@
+package cc.carm.lib.easyplugin.command.alias;
+
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import org.bukkit.command.SimpleCommandMap;
+import org.bukkit.plugin.SimplePluginManager;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * 指令简化别名(简化映射)管理器
+ * <br>支持将插件内复杂的子指令简化为一个单独的指令，方便玩家使用。
+ */
+public class AliasCommandManager {
+
+    protected final @NotNull JavaPlugin plugin;
+    protected final @NotNull String prefix;
+
+    protected final @NotNull SimpleCommandMap commandMap;
+    protected final @NotNull Field knownCommandsFiled;
+
+    protected final @NotNull Map<String, AliasCommand> registeredCommands = new HashMap<>();
+
+    public AliasCommandManager(@NotNull JavaPlugin plugin) throws Exception {
+        this(plugin, plugin.getName());
+    }
+
+    public AliasCommandManager(@NotNull JavaPlugin plugin, @NotNull String prefix) throws Exception {
+        this.plugin = plugin;
+        this.prefix = prefix.trim();
+
+        SimplePluginManager manager = (SimplePluginManager) Bukkit.getPluginManager();
+        Field commandMapField = SimplePluginManager.class.getDeclaredField("commandMap");
+        commandMapField.setAccessible(true);
+        this.commandMap = (SimpleCommandMap) commandMapField.get(manager);
+
+        this.knownCommandsFiled = SimpleCommandMap.class.getDeclaredField("knownCommands");
+        this.knownCommandsFiled.setAccessible(true);
+    }
+
+    @SuppressWarnings("unchecked")
+    protected Map<String, Command> getKnownCommands() {
+        try {
+            return (Map<String, Command>) knownCommandsFiled.get(commandMap);
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        return new HashMap<>();
+    }
+
+    protected @NotNull SimpleCommandMap getCommandMap() {
+        return commandMap;
+    }
+
+    public String getCommandPrefix() {
+        return this.prefix;
+    }
+
+    public void register(@NotNull String alias, @NotNull String subCommand) {
+        AliasCommand current = this.registeredCommands.get(alias);
+        if (current != null) current.unregister(getCommandMap());
+
+        AliasCommand cmd = new AliasCommand(alias, this, getCommandPrefix() + " " + subCommand);
+        this.registeredCommands.put(alias, cmd);
+        getCommandMap().register(plugin.getName(), cmd);
+    }
+
+    public void unregister(@NotNull String alias) {
+        AliasCommand current = this.registeredCommands.remove(alias);
+        if (current != null) {
+            getKnownCommands().remove(alias);
+            current.unregister(getCommandMap());
+        }
+    }
+
+    public void unregisterAll() {
+        registeredCommands.forEach((k, v) -> {
+            getKnownCommands().remove(k);
+            v.unregister(getCommandMap());
+        });
+        registeredCommands.clear();
+    }
+
+}

base/command/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyplugin-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>1.4.10</version>
+        <version>1.5.5</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -48,4 +48,14 @@
         <url>https://github.com/CarmJos/EasyPlugin/actions/workflows/maven.yml</url>
     </ciManagement>
 
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

base/command/src/main/java/cc/carm/lib/easyplugin/command/CommandHandler.java

@@ -11,13 +11,14 @@ import org.jetbrains.annotations.Nullable;
 import java.util.*;
 import java.util.stream.Collectors;
 
+@SuppressWarnings("UnusedReturnValue")
 public abstract class CommandHandler implements TabExecutor, NamedExecutor {
 
     protected final @NotNull JavaPlugin plugin;
     protected final @NotNull String cmd;
     protected final @NotNull List<String> aliases;
 
-    protected final @NotNull Map<String, SubCommand> registeredCommands = new HashMap<>();
+    protected final @NotNull Map<String, SubCommand<?>> registeredCommands = new HashMap<>();
     protected final @NotNull Map<String, CommandHandler> registeredHandlers = new HashMap<>();
 
     protected final @NotNull Map<String, String> aliasesMap = new HashMap<>();
@@ -36,13 +37,19 @@ public abstract class CommandHandler implements TabExecutor, NamedExecutor {
         this.aliases = Arrays.asList(aliases);
     }
 
-    public abstract void noArgs(CommandSender sender);
+    public abstract Void noArgs(CommandSender sender);
 
-    public void unknownCommand(CommandSender sender, String[] args) {
-        noArgs(sender);
+    public Void unknownCommand(CommandSender sender, String[] args) {
+        return noArgs(sender);
     }
 
-    public abstract void noPermission(CommandSender sender);
+    public abstract Void noPermission(CommandSender sender);
+
+    public Void onException(CommandSender sender, SubCommand<?> cmd, Exception ex) {
+        sender.sendMessage("Error occurred when executing " + cmd.getIdentifier() + ": " + ex.getLocalizedMessage());
+        ex.printStackTrace();
+        return null;
+    }
 
     @Override
     public @NotNull List<String> getAliases() {
@@ -50,52 +57,59 @@ public abstract class CommandHandler implements TabExecutor, NamedExecutor {
     }
 
     @Override
-    public String getName() {
+    public @NotNull String getIdentifier() {
         return this.cmd;
     }
 
-    public void registerSubCommand(SubCommand command) {
-        String name = command.getName().toLowerCase();
+    public void registerSubCommand(SubCommand<?> command) {
+        String name = command.getIdentifier().toLowerCase();
         this.registeredCommands.put(name, command);
         command.getAliases().forEach(alias -> this.aliasesMap.put(alias.toLowerCase(), name));
     }
 
     public void registerHandler(CommandHandler handler) {
-        String name = handler.getName().toLowerCase();
+        String name = handler.getIdentifier().toLowerCase();
         this.registeredHandlers.put(name, handler);
         handler.getAliases().forEach(alias -> this.aliasesMap.put(alias.toLowerCase(), name));
     }
 
     @Override
     public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (!this.hasPermission(sender)) {
+            noPermission(sender);
+            return true;
+        }
+
         if (args.length == 0) {
             this.noArgs(sender);
-        } else {
-            String input = args[0].toLowerCase();
+            return true;
+        }
 
-            CommandHandler handler = getHandler(input);
-            if (handler != null) {
-                if (!handler.hasPermission(sender)) {
-                    this.noPermission(sender);
-                } else {
-                    handler.onCommand(sender, command, label, this.shortenArgs(args));
-                }
-            }
+        String input = args[0].toLowerCase();
 
-            SubCommand subCommand = getSubCommand(input);
-            if (subCommand == null) {
-                this.unknownCommand(sender, args);
-            } else if (!subCommand.hasPermission(sender)) {
+        CommandHandler handler = getHandler(input);
+        if (handler != null) {
+            if (!handler.hasPermission(sender)) {
                 this.noPermission(sender);
             } else {
-                try {
-                    subCommand.execute(this.plugin, sender, this.shortenArgs(args));
-                } catch (ArrayIndexOutOfBoundsException var9) {
-                    this.unknownCommand(sender, args);
-                }
+                handler.onCommand(sender, command, label, this.shortenArgs(args));
             }
-
+            return true;
         }
+
+        SubCommand<?> sub = getSubCommand(input);
+        if (sub == null) {
+            this.unknownCommand(sender, args);
+        } else if (!sub.hasPermission(sender)) {
+            this.noPermission(sender);
+        } else {
+            try {
+                sub.execute(this.plugin, sender, this.shortenArgs(args));
+            } catch (Exception ex) {
+                this.onException(sender, sub, ex);
+            }
+        }
+
         return true;
     }
 
@@ -107,7 +121,7 @@ public abstract class CommandHandler implements TabExecutor, NamedExecutor {
         if (args.length == 1) {
             return getExecutors().stream()
                     .filter(e -> e.hasPermission(sender))
-                    .map(NamedExecutor::getName)
+                    .map(NamedExecutor::getIdentifier)
                     .filter(s -> StringUtil.startsWithIgnoreCase(s, input))
                     .collect(Collectors.toList());
         } else {
@@ -117,9 +131,9 @@ public abstract class CommandHandler implements TabExecutor, NamedExecutor {
                 return handler.onTabComplete(sender, command, alias, this.shortenArgs(args));
             }
 
-            SubCommand subCommand = getSubCommand(input);
-            if (subCommand != null && subCommand.hasPermission(sender)) {
-                return subCommand.tabComplete(this.plugin, sender, this.shortenArgs(args));
+            SubCommand<?> sub = getSubCommand(input);
+            if (sub != null && sub.hasPermission(sender)) {
+                return sub.tabComplete(this.plugin, sender, this.shortenArgs(args));
             }
 
             return Collections.emptyList();
@@ -131,7 +145,7 @@ public abstract class CommandHandler implements TabExecutor, NamedExecutor {
         executors.addAll(this.registeredHandlers.values());
         executors.addAll(this.registeredCommands.values());
         List<NamedExecutor> sortedExecutors = new ArrayList<>(executors);
-        sortedExecutors.sort(Comparator.comparing(NamedExecutor::getName));
+        sortedExecutors.sort(Comparator.comparing(NamedExecutor::getIdentifier));
         return sortedExecutors;
     }
 
@@ -144,8 +158,8 @@ public abstract class CommandHandler implements TabExecutor, NamedExecutor {
         else return this.registeredHandlers.get(nameFromAlias);
     }
 
-    protected @Nullable SubCommand getSubCommand(@NotNull String name) {
-        SubCommand fromName = this.registeredCommands.get(name);
+    protected @Nullable SubCommand<?> getSubCommand(@NotNull String name) {
+        SubCommand<?> fromName = this.registeredCommands.get(name);
         if (fromName != null) return fromName;
 
         String nameFromAlias = this.aliasesMap.get(name);

base/command/src/main/java/cc/carm/lib/easyplugin/command/NamedExecutor.java

@@ -1,7 +1,6 @@
 package cc.carm.lib.easyplugin.command;
 
 import org.bukkit.command.CommandSender;
-import org.bukkit.permissions.Permissible;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -12,16 +11,16 @@ import java.util.function.Function;
 
 public interface NamedExecutor {
 
-    String getName();
+    @NotNull String getIdentifier();
 
-    List<String> getAliases();
+    @NotNull List<String> getAliases();
 
-    default boolean hasPermission(Permissible permissible) {
+    default boolean hasPermission(@NotNull CommandSender sender) {
         return true;
     }
 
     default Void sendMessage(@NotNull CommandSender sender, @NotNull String... messages) {
-        return sendMessage(sender, (Function<String, String>) null, messages);
+        return sendMessage(sender, Function.identity(), messages);
     }
 
     default Void sendMessage(@NotNull CommandSender sender,

base/command/src/main/java/cc/carm/lib/easyplugin/command/SubCommand.java

@@ -2,42 +2,46 @@ package cc.carm.lib.easyplugin.command;
 
 import org.bukkit.command.CommandSender;
 import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Unmodifiable;
 
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
 @SuppressWarnings("UnusedReturnValue")
-public abstract class SubCommand implements NamedExecutor {
+public abstract class SubCommand<C extends CommandHandler> implements NamedExecutor {
 
-    private final String name;
+    private final @NotNull C parent;
+
+    private final String identifier;
     private final List<String> aliases;
 
-    public SubCommand(String name) {
-        this(name, new String[0]);
-    }
-
-    public SubCommand(String name, String... aliases) {
-        this.name = name;
+    public SubCommand(@NotNull C parent, String identifier, String... aliases) {
+        this.parent = parent;
+        this.identifier = identifier;
         this.aliases = Arrays.asList(aliases);
     }
 
-
-    @Override
-    public String getName() {
-        return this.name;
+    public @NotNull C getParent() {
+        return parent;
     }
 
     @Override
-    public List<String> getAliases() {
+    public @NotNull String getIdentifier() {
+        return this.identifier;
+    }
+
+    @Override
+    @Unmodifiable
+    public @NotNull List<String> getAliases() {
         return this.aliases;
     }
 
-    public abstract Void execute(JavaPlugin plugin, CommandSender sender, String[] args);
+    public abstract Void execute(JavaPlugin plugin, CommandSender sender, String[] args) throws Exception;
 
     public List<String> tabComplete(JavaPlugin plugin, CommandSender sender, String[] args) {
         return Collections.emptyList();
     }
 
-
 }

base/gui/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyplugin-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>1.4.10</version>
+        <version>1.5.5</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -59,4 +59,13 @@
         </dependency>
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

base/gui/src/main/java/cc/carm/lib/easyplugin/gui/GUI.java

@@ -13,10 +13,7 @@ import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.UUID;
+import java.util.*;
 import java.util.stream.IntStream;
 
 public class GUI {
@@ -56,9 +53,9 @@ public class GUI {
      */
     boolean cancelOnOuter = true;
 
-    Map<String, Object> flags;
+    protected final Map<String, Object> flags = new LinkedHashMap<>();
 
-    GUIListener listener;
+    protected GUIListener listener;
 
     public GUI(GUIType type, String name) {
         this.type = type;
@@ -131,24 +128,15 @@ public class GUI {
         this.cancelOnOuter = b;
     }
 
-    public void addFlag(String flag, Object obj) {
-        if (this.flags == null) this.flags = new HashMap<>();
-        this.flags.put(flag, obj);
-    }
-
     public Object getFlag(String flag) {
-        if (this.flags == null) return null;
-        else
-            return this.flags.get(flag);
+        return this.flags.get(flag);
     }
 
     public void setFlag(String flag, Object obj) {
-        if (this.flags == null) this.flags = new HashMap<>();
-        this.flags.replace(flag, obj);
+        this.flags.put(flag, obj);
     }
 
     public void removeFlag(String flag) {
-        if (this.flags == null) this.flags = new HashMap<>();
         this.flags.remove(flag);
     }
 
@@ -193,6 +181,13 @@ public class GUI {
     public void onClose() {
     }
 
+    public GUIType getGUIType() {
+        return type;
+    }
+
+    public String getGUIName() {
+        return name;
+    }
 
     public static void setOpenedGUI(Player player, GUI gui) {
         getOpenedGUIs().put(player.getUniqueId(), gui);

base/gui/src/main/java/cc/carm/lib/easyplugin/gui/GUIItem.java

@@ -37,12 +37,24 @@ public class GUIItem {
     }
 
     /**
-     * 玩家点击GUI后执行的代码
+     * 玩家点击该物品后执行的代码
+     * 可以使用 {@link #onClick(Player, ClickType)} 操作点击者
      *
      * @param type 点击的类型
      */
+    @Deprecated
+    @SuppressWarnings("DeprecatedIsStillUsed")
     public void onClick(ClickType type) {
+    }
 
+    /**
+     * 玩家点击GUI后执行的代码
+     *
+     * @param clicker 点击的玩家
+     * @param type    点击的类型
+     */
+    public void onClick(Player clicker, ClickType type) {
+        this.onClick(type); // Deprecated method support
     }
 
     public void addClickAction(GUIClickAction action) {
@@ -58,7 +70,7 @@ public class GUIItem {
     }
 
     /**
-     * 玩家点击GUI后执行的代码
+     * 自定义点击事件代码 (须自行触发)
      *
      * @param player 点击GUI的玩家
      */

base/gui/src/main/java/cc/carm/lib/easyplugin/gui/GUIListener.java

@@ -45,7 +45,7 @@ public class GUIListener implements Listener {
                 GUIItem clickedItem = getCurrentGUI().getItem(event.getSlot());
                 if (clickedItem != null) {
                     if (clickedItem.isActionActive()) {
-                        clickedItem.onClick(event.getClick());
+                        clickedItem.onClick(player, event.getClick());
                         clickedItem.rawClickAction(event);
                         clickedItem.actions.forEach(action -> action.run(event.getClick(), player));
                     }

base/gui/src/main/java/cc/carm/lib/easyplugin/gui/GUIType.java

@@ -14,8 +14,8 @@ public enum GUIType {
     SIX_BY_NINE(6, 54),
     CANCEL(0, 0);
 
-    int lines;
-    int size;
+    private final int lines;
+    private final int size;
 
     GUIType(int lines, int size) {
         this.lines = lines;

base/gui/src/main/java/cc/carm/lib/easyplugin/gui/configuration/GUIConfiguration.java

@@ -6,19 +6,26 @@ import cc.carm.lib.easyplugin.utils.ColorParser;
 import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.entity.Player;
 import org.bukkit.event.inventory.ClickType;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.*;
-import java.util.stream.Collectors;
+import java.util.Arrays;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Optional;
 
 public class GUIConfiguration {
 
-    String title;
-    int lines;
+    protected String title;
+    protected int lines;
 
-    List<GUIItemConfiguration> guiItems;
+    protected Map<String, GUIItemConfiguration> guiItems;
 
-    public GUIConfiguration(String title, int lines, List<GUIItemConfiguration> guiItems) {
+    public GUIConfiguration(String title, int lines) {
+        this(title, lines, new LinkedHashMap<>(1));
+    }
+
+    public GUIConfiguration(String title, int lines, Map<String, GUIItemConfiguration> guiItems) {
         this.title = title;
         this.lines = lines;
         this.guiItems = guiItems;
@@ -38,31 +45,50 @@ public class GUIConfiguration {
                 .get();
     }
 
-    public List<GUIItemConfiguration> getGuiItems() {
+    public Map<String, GUIItemConfiguration> getGUIItems() {
         return guiItems;
     }
 
     public void setupItems(Player player, GUI gui) {
-        getGuiItems().forEach(itemConfiguration -> itemConfiguration.setupItems(player, gui));
+        getGUIItems().values().forEach(itemConfiguration -> itemConfiguration.setupItems(player, gui));
+    }
+
+    public @NotNull Map<String, Object> serialize() {
+        LinkedHashMap<String, Object> map = new LinkedHashMap<>();
+
+        map.put("title", this.title);
+        map.put("lines", this.lines);
+        if (!this.guiItems.isEmpty()) {
+            LinkedHashMap<String, Object> items = new LinkedHashMap<>();
+            this.guiItems.forEach((key, value) -> items.put(key, value.serialize()));
+            map.put("items", items);
+        }
+        return map;
     }
 
 
     public static GUIConfiguration readConfiguration(@Nullable ConfigurationSection section) {
-        if (section == null) return new GUIConfiguration("name", 6, new ArrayList<>());
-
-        String title = section.getString("title", "");
-        int lines = section.getInt("lines", 6);
-        ConfigurationSection itemsSection = section.getConfigurationSection("items");
-        if (itemsSection == null) return new GUIConfiguration(title, lines, new ArrayList<>());
+        if (section == null) return new GUIConfiguration("name", 6);
 
         return new GUIConfiguration(
-                title, lines, itemsSection.getKeys(false).stream()
-                .map(key -> GUIItemConfiguration.readFrom(itemsSection.getConfigurationSection(key)))
-                .filter(Objects::nonNull)
-                .collect(Collectors.toList())
+                section.getString("title", ""),
+                section.getInt("lines", 6),
+                readItems(section.getConfigurationSection("items"))
         );
     }
 
+    public static Map<String, GUIItemConfiguration> readItems(ConfigurationSection itemsSection) {
+        Map<String, GUIItemConfiguration> items = new LinkedHashMap<>();
+        if (itemsSection == null) return items;
+
+        for (String key : itemsSection.getKeys(false)) {
+            GUIItemConfiguration item = GUIItemConfiguration.readFrom(itemsSection.getConfigurationSection(key));
+            if (item != null) items.put(key, item);
+        }
+
+        return items;
+    }
+
     public static ClickType readClickType(String type) {
         return Arrays.stream(ClickType.values())
                 .filter(click -> click.name().equalsIgnoreCase(type))

base/gui/src/main/java/cc/carm/lib/easyplugin/gui/configuration/GUIItemConfiguration.java

@@ -2,11 +2,14 @@ package cc.carm.lib.easyplugin.gui.configuration;
 
 import cc.carm.lib.easyplugin.gui.GUI;
 import cc.carm.lib.easyplugin.gui.GUIItem;
+import cc.carm.lib.easyplugin.utils.ColorParser;
 import cc.carm.lib.easyplugin.utils.ItemStackFactory;
 import cc.carm.lib.easyplugin.utils.MessageUtils;
 import org.bukkit.Material;
 import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -15,6 +18,8 @@ import java.util.stream.Collectors;
 
 public class GUIItemConfiguration {
 
+    @Nullable ItemStack original;
+
     @NotNull Material type;
     int amount;
     int data;
@@ -28,6 +33,15 @@ public class GUIItemConfiguration {
                                 @Nullable String name, @NotNull List<String> lore,
                                 @NotNull List<GUIActionConfiguration> actions,
                                 @NotNull List<Integer> slots) {
+        this(null, type, amount, data, name, lore, actions, slots);
+    }
+
+    public GUIItemConfiguration(@Nullable ItemStack original,
+                                @NotNull Material type, int amount, int data,
+                                @Nullable String name, @NotNull List<String> lore,
+                                @NotNull List<GUIActionConfiguration> actions,
+                                @NotNull List<Integer> slots) {
+        this.original = original;
         this.type = type;
         this.amount = amount;
         this.data = data;
@@ -38,22 +52,58 @@ public class GUIItemConfiguration {
     }
 
     public void setupItems(Player player, GUI gui) {
-        ItemStackFactory icon = new ItemStackFactory(this.type, this.amount, this.data);
-        if (this.name != null) icon.setDisplayName(this.name);
-        icon.setLore(MessageUtils.setPlaceholders(player, this.lore));
+        ItemStack itemStack;
+        if (original != null) {
+            ItemStack tmp = original.clone();
+            ItemMeta originalMeta = original.getItemMeta();
+            if (originalMeta != null) {
+                if (originalMeta.hasDisplayName()) {
+                    originalMeta.setDisplayName(parseText(player, originalMeta.getDisplayName()));
+                }
+                if (originalMeta.getLore() != null) {
+                    originalMeta.setLore(parseTexts(player, originalMeta.getLore()));
+                }
 
-        GUIItem item = new GUIItem(icon.toItemStack());
+            }
+
+            tmp.setItemMeta(originalMeta);
+            itemStack = tmp;
+        } else {
+            ItemStackFactory icon = new ItemStackFactory(this.type, this.amount, this.data);
+            if (this.name != null) {
+                icon.setDisplayName(parseText(player, this.name));
+            }
+            if (!this.lore.isEmpty()) {
+                icon.setLore(parseTexts(player, this.lore));
+            }
+            itemStack = icon.toItemStack();
+        }
+
+
+        GUIItem item = new GUIItem(itemStack);
         this.actions.stream().map(GUIActionConfiguration::toClickAction).forEach(item::addClickAction);
         this.slots.forEach(slot -> gui.setItem(slot, item));
     }
 
+    private List<String> parseTexts(Player player, List<String> lore) {
+        return ColorParser.parse(MessageUtils.setPlaceholders(player, lore));
+    }
+
+    @NotNull
+    private String parseText(Player player, @NotNull String name) {
+        return ColorParser.parse(MessageUtils.setPlaceholders(player, name));
+    }
+
     public @NotNull Map<String, Object> serialize() {
         LinkedHashMap<String, Object> map = new LinkedHashMap<>();
+        if (original != null) map.put("original", original);
+        else {
+            map.put("type", this.type.name());
+            if (this.data != 0) map.put("data", this.data);
+        }
 
-        map.put("type", this.type.name());
         if (this.name != null) map.put("name", this.name);
         if (this.amount != 1) map.put("amount", this.amount);
-        if (this.data != 0) map.put("data", this.data);
         if (!this.lore.isEmpty()) map.put("lore", this.lore);
         if (this.slots.size() > 1) {
             map.put("slots", this.slots);
@@ -69,6 +119,10 @@ public class GUIItemConfiguration {
     @Nullable
     public static GUIItemConfiguration readFrom(@Nullable ConfigurationSection itemSection) {
         if (itemSection == null) return null;
+
+        ItemStack original = null;
+        if (itemSection.contains("original")) original = itemSection.getItemStack("original");
+
         String material = Optional.ofNullable(itemSection.getString("type")).orElse("STONE");
         Material type = Optional.ofNullable(Material.matchMaterial(material)).orElse(Material.STONE);
         int data = itemSection.getInt("data", 0);
@@ -88,7 +142,7 @@ public class GUIItemConfiguration {
         }
 
         return new GUIItemConfiguration(
-                type, amount, data, name, lore, actions,
+                original, type, amount, data, name, lore, actions,
                 slots.size() > 0 ? slots : Collections.singletonList(slot)
         );
     }

base/gui/src/main/java/cc/carm/lib/easyplugin/gui/paged/AutoPagedGUI.java

@@ -49,7 +49,7 @@ public class AutoPagedGUI extends CommonPagedGUI {
                 setItem(previousPageSlot, new GUIItem(
                         previousPageUI == null ? getDefaultPreviousPage(user) : previousPageUI) {
                     @Override
-                    public void onClick(ClickType type) {
+                    public void onClick(Player clicker, ClickType type) {
                         if (type == ClickType.RIGHT) {
                             goFirstPage();
                         } else {
@@ -68,7 +68,7 @@ public class AutoPagedGUI extends CommonPagedGUI {
                 setItem(nextPageSlot, new GUIItem(
                         nextPageUI == null ? getDefaultNextPage(user) : nextPageUI) {
                     @Override
-                    public void onClick(ClickType type) {
+                    public void onClick(Player clicker, ClickType type) {
                         if (type == ClickType.RIGHT) {
                             goLastPage();
                         } else {

base/gui/src/main/java/cc/carm/lib/easyplugin/gui/paged/CommonPagedGUI.java

@@ -117,7 +117,7 @@ public class CommonPagedGUI extends PagedGUI {
      * @return 最后一页的页码
      */
     public int getLastPageNumber() {
-        return (this.container.size() / range.length) + 1;
+        return (this.container.size() / range.length) + ((this.container.size() % range.length) == 0 ? 0 : 1);
     }
 
     /**

base/main/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyplugin-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>1.4.10</version>
+        <version>1.5.5</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -22,7 +22,7 @@
     <packaging>jar</packaging>
 
     <name>EasyPlugin-Main</name>
-    <description>轻松插件主要接口模块，包含方便的插件入口类与相关工具类。</description>
+    <description>轻松插件主要接口模块，包含便捷的插件入口类与相关工具类。</description>
     <url>https://github.com/CarmJos/EasyPlugin</url>
 
     <developers>
@@ -53,6 +53,13 @@
 
     <dependencies>
 
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>easyplugin-utils</artifactId>
+            <version>${project.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
         <dependency>
             <groupId>me.clip</groupId>
             <artifactId>placeholderapi</artifactId>
@@ -61,4 +68,13 @@
 
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

base/main/src/main/java/cc/carm/lib/easyplugin/EasyPlugin.java

@@ -22,6 +22,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
+import java.util.function.Supplier;
 
 public abstract class EasyPlugin extends JavaPlugin {
 
@@ -145,22 +146,64 @@ public abstract class EasyPlugin extends JavaPlugin {
         if (isDebugging()) print("&8[DEBUG] &r", messages);
     }
 
-    public @NotNull <T extends Event> CompletableFuture<T> callSync(T event) {
+    /**
+     * 在主线程执行操作，并支持获取其结果。
+     *
+     * @param <T>    结果类型
+     * @param action 需要执行的内容
+     * @return CompletableFuture
+     */
+    public @NotNull <T> CompletableFuture<T> supplySync(@NotNull Supplier<T> action) {
         CompletableFuture<T> future = new CompletableFuture<>();
-        getScheduler().run(() -> {
-            Bukkit.getPluginManager().callEvent(event);
-            future.complete(event);
-        });
+        getScheduler().run(() -> future.complete(action.get()));
         return future;
     }
 
-    public @NotNull <T extends Event> CompletableFuture<T> callAsync(T event) {
-        return CompletableFuture.supplyAsync(() -> {
+    /**
+     * 在异步线程中执行一个操作，并获取操作的结果。
+     *
+     * @param <T>    事件类型
+     * @param action 需要执行的内容
+     * @return CompletableFuture
+     */
+    public @NotNull <T> CompletableFuture<T> supplyAsync(@NotNull Supplier<T> action) {
+        CompletableFuture<T> future = new CompletableFuture<>();
+        getScheduler().runAsync(() -> future.complete(action.get()));
+        return future;
+    }
+
+    /**
+     * 在主线程唤起一个事件，并支持获取事件的结果。
+     *
+     * @param event 同步事件 (isAsync=false)
+     * @param <T>   事件类型
+     * @return CompletableFuture
+     */
+    public @NotNull <T extends Event> CompletableFuture<T> callSync(T event) {
+        return supplySync(() -> {
             Bukkit.getPluginManager().callEvent(event);
             return event;
         });
     }
 
+    /**
+     * 在异步线程中唤起一个事件，并支持获取事件的结果。
+     *
+     * @param event 异步事件 (isAsync=true)
+     * @param <T>   事件类型
+     * @return CompletableFuture
+     */
+    public @NotNull <T extends Event> CompletableFuture<T> callAsync(T event) {
+        return supplyAsync(() -> {
+            Bukkit.getPluginManager().callEvent(event);
+            return event;
+        });
+    }
+
+    protected void setMessageProvider(@NotNull EasyPluginMessageProvider provider) {
+        this.messageProvider = provider;
+    }
+
     @SuppressWarnings("BooleanMethodIsAlwaysInverted")
     private boolean hasOverride(String methodName) {
         Map<Method, Method> methodMap = new HashMap<>();

base/main/src/main/java/cc/carm/lib/easyplugin/utils/ColorParser.java

@@ -1,31 +1,90 @@
 package cc.carm.lib.easyplugin.utils;
 
-import java.util.Arrays;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.awt.*;
 import java.util.List;
+import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
+import java.util.stream.IntStream;
 
+/**
+ * 颜色解析器。
+ * <br> 普通颜色 格式 {@code &+颜色代码 }，如 {@literal &c} 、{@literal &a}
+ * <br> RGB颜色(版本需要≥1.14) 格式 {@code &(#XXXXXX) }，如 {@literal &(#aaaaaa)}
+ * <br> 渐变RBG颜色(版本需要≥1.14) 格式 {@code &<#XXXXXX>FOOBAR&<#XXXXXX> }
+ * <p> 注意：当使用渐变RGB颜色时，普通颜色代码与RGB颜色代码将失效。
+ */
 public class ColorParser {
 
     public static final Pattern HEX_PATTERN = Pattern.compile("&\\(&?#([\\da-fA-F]{6})\\)");
+    public static final Pattern GRADIENT_PATTERN = Pattern.compile("&<&?#([\\da-fA-F]{6})>");
+    public static final Pattern COLOR_PATTERN = Pattern.compile("([&§][0-9a-fA-FrRxX])+"); // 会影响颜色的代码
+    public static final Pattern FORMAT_PATTERN = Pattern.compile("([&§][0-9a-fA-Fk-oK-OrRxX])+"); // MC可用的格式化代码
 
-    public static String parse(String text) {
-        return parseBaseColor(parseHexColor(text));
+    /**
+     * 清除一条消息中的全部颜色代码 (包括RGB颜色代码与渐变颜色代码)
+     *
+     * @param text 源消息内容
+     * @return 清理颜色后的消息
+     */
+    public static @NotNull String clear(@NotNull String text) {
+        text = HEX_PATTERN.matcher(text).replaceAll("");
+        text = GRADIENT_PATTERN.matcher(text).replaceAll("");
+        text = COLOR_PATTERN.matcher(text).replaceAll("");
+        return text;
     }
 
-    public static String[] parse(String... texts) {
+    /**
+     * 对一条消息进行颜色解析，包括普通颜色代码、RGB颜色代码与RBG渐变代码。
+     *
+     * @param text 源消息内容
+     * @return 解析后的消息
+     */
+    public static @NotNull String parse(@NotNull String text) {
+        return parseBaseColor(parseGradientColor(parseHexColor(text)));
+    }
+
+    /**
+     * 对多条消息进行颜色解析，包括普通颜色代码、RGB颜色代码与RBG渐变代码。
+     *
+     * @param texts 源消息内容
+     * @return 解析后的消息
+     */
+    public static @NotNull String[] parse(@NotNull String... texts) {
         return parse(Arrays.asList(texts)).toArray(new String[0]);
     }
 
-    public static List<String> parse(List<String> texts) {
+    /**
+     * 对多条消息进行颜色解析，包括普通颜色代码、RGB颜色代码与RBG渐变代码。
+     *
+     * @param texts 源消息内容
+     * @return 解析后的消息
+     */
+    public static @NotNull List<String> parse(@NotNull Collection<String> texts) {
         return texts.stream().map(ColorParser::parse).collect(Collectors.toList());
     }
 
+    /**
+     * 解析消息中的基本颜色代码格式 {@code &+颜色代码 }，如 {@literal &c} 、{@literal &a}
+     *
+     * @param text 消息内容
+     * @return RGB处理后的消息
+     * @see net.md_5.bungee.api.ChatColor
+     */
     public static String parseBaseColor(final String text) {
         return text.replaceAll("&", "§").replace("§§", "&");
     }
 
+    /**
+     * 解析消息中的RGB颜色代码(版本需要≥1.14) 格式 {@code &(#XXXXXX) }，如 {@literal &(#aaaaaa)}
+     *
+     * @param text 消息内容
+     * @return RGB处理后的消息
+     */
     public static String parseHexColor(String text) {
         Matcher matcher = HEX_PATTERN.matcher(text);
         while (matcher.find()) {
@@ -35,9 +94,114 @@ public class ColorParser {
         return text;
     }
 
-    private static String buildHexColor(String hexCode) {
-        return Arrays.stream(hexCode.split(""))
-                .map(s -> '§' + s)
+    /**
+     * 对一条消息进行RGB渐变处理(版本需要≥1.14)，格式 {@code &<#XXXXXX>FOOBAR&<#XXXXXX> }。
+     *
+     * @param text 消息内容
+     * @return RGB渐变处理后的消息
+     */
+    public static @NotNull String parseGradientColor(@NotNull String text) {
+        List<String> colors = new ArrayList<>();
+
+        Matcher matcher = ColorParser.GRADIENT_PATTERN.matcher(text);
+        while (matcher.find()) colors.add(matcher.group(1));
+
+        if (colors.isEmpty()) return text; // 无渐变颜色，直接跳出
+
+        String[] parts = ColorParser.GRADIENT_PATTERN.split(text);
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < parts.length; i++) {
+            String startHex = i - 1 >= 0 && colors.size() > i - 1 ? colors.get(i - 1) : null; // 本条消息的起始颜色
+            String endHex = colors.size() > i ? colors.get(i) : null; // 本条消息的结束颜色
+            builder.append(gradientText(parts[i], startHex, endHex));
+        }
+
+        return builder.toString();
+    }
+
+    public static @NotNull String gradientText(@NotNull String text,
+                                               @Nullable Color startColor, @Nullable Color endColor) {
+        Objects.requireNonNull(text, "Text to be gradient should not be null!");
+        if (startColor == null || endColor == null || text.isEmpty()) {
+            // 起始颜色有任一为空，则不进行渐变上色。
+            // 若有起始颜色，则代表其跟在某个渐变之后，应当添加"&r"阻断前面的渐变。
+            return (startColor != null ? "&r" : "") + text;
+        }
+
+        // 用于记录消息中特殊格式的位置
+        // 在渐变中，允许使用格式字符与颜色字符来改变其中某个字的颜色/格式，以支持更多形式内容。
+        LinkedHashMap<Integer, String> extraFormats = new LinkedHashMap<>();
+        Matcher matcher = ColorParser.FORMAT_PATTERN.matcher(text);
+        while (matcher.find()) {
+            extraFormats.put(matcher.start(), matcher.group());
+            text = matcher.replaceFirst("");
+            matcher.reset(text);
+        }
+
+        if (text.length() == 1) {
+            // 当只有一个实际字符时，无需进行渐变计算，直接返回 中间颜色+起始格式(如果有)+消息 即可。
+            return colorText(text, extraFormats.get(0), buildHexColor(mediumHex(startColor, endColor)));
+        }
+
+        String[] characters = text.split("");
+        int step = characters.length; // 变换次数
+
+        // 决定每种颜色变换的方向
+        int rDirection = startColor.getRed() < endColor.getRed() ? 1 : -1;
+        int gDirection = startColor.getGreen() < endColor.getGreen() ? 1 : -1;
+        int bDirection = startColor.getBlue() < endColor.getBlue() ? 1 : -1;
+
+        // 决定每种颜色每次变换的度
+        int rStep = Math.abs(startColor.getRed() - endColor.getRed()) / (step - 1);
+        int gStep = Math.abs(startColor.getGreen() - endColor.getGreen()) / (step - 1);
+        int bStep = Math.abs(startColor.getBlue() - endColor.getBlue()) / (step - 1);
+
+        String[] hexes = IntStream.range(0, step).mapToObj(i -> colorToHex(
+                startColor.getRed() + rStep * i * rDirection,
+                startColor.getGreen() + gStep * i * gDirection,
+                startColor.getBlue() + bStep * i * bDirection
+        )).toArray(String[]::new);
+
+        return IntStream.range(0, characters.length)
+                .mapToObj(i -> colorText(characters[i], extraFormats.get(i), buildHexColor(hexes[i])))
+                .collect(Collectors.joining());
+    }
+
+    protected static String gradientText(@NotNull String text, @Nullable String startHex, @Nullable String endHex) {
+        return gradientText(text,
+                startHex == null ? null : Color.decode("0x" + startHex),
+                endHex == null ? null : Color.decode("0x" + endHex)
+        );
+    }
+
+    private static String mediumHex(@NotNull Color start, @NotNull Color end) {
+        return colorToHex(
+                Math.abs(start.getRed() - end.getRed()) / 2,
+                Math.abs(start.getGreen() - end.getGreen()) / 2,
+                Math.abs(start.getBlue() - end.getBlue()) / 2
+        );
+    }
+
+    private static String colorText(String message, @Nullable String format, @Nullable String color) {
+        if (format != null && COLOR_PATTERN.matcher(format).find()) {
+            // format中存在影响颜色的内容，则当前消息的颜色会被覆盖。
+            // 为了减少最终消息的长度，故直接返回键入的FORMAT和对应消息的内容。
+            return format + message;
+        }
+        return (color == null ? "" : color) + (format == null ? "" : parseBaseColor(format)) + message;
+    }
+
+    protected static String colorToHex(Color color) {
+        return colorToHex(color.getRed(), color.getGreen(), color.getBlue());
+    }
+
+    protected static String colorToHex(int r, int g, int b) {
+        // 将R、G、B转换为16进制(若非2位则补0)输出
+        return String.format("%02X%02X%02X", r, g, b);
+    }
+
+    protected static String buildHexColor(String hexCode) {
+        return Arrays.stream(hexCode.split("")).map(s -> '§' + s)
                 .collect(Collectors.joining("", '§' + "x", ""));
     }
 

base/messages/pom.xml

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>cc.carm.lib</groupId>
+        <artifactId>easyplugin-parent</artifactId>
+        <version>1.5.5</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+    <properties>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
+        <maven.deploy.skip>true</maven.deploy.skip>
+    </properties>
+    <artifactId>easyplugin-messages</artifactId>
+
+    <name>EasyPlugin-Messages</name>
+    <description>
+        轻松插件消息配置模块，支持多种消息配置，包括文本消息、ActionBar消息、Title消息、声音、粒子效果播放等。
+    </description>
+    <url>https://github.com/CarmJos/EasyPlugin</url>
+
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>easyplugin-color</artifactId>
+            <version>${project.version}</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+    <developers>
+        <developer>
+            <id>CarmJos</id>
+            <name>Carm Jos</name>
+            <email>carm@carm.cc</email>
+            <url>https://www.carm.cc</url>
+        </developer>
+    </developers>
+
+    <licenses>
+        <license>
+            <name>The MIT License</name>
+            <url>https://opensource.org/licenses/MIT</url>
+        </license>
+    </licenses>
+
+    <issueManagement>
+        <system>GitHub Issues</system>
+        <url>https://github.com/CarmJos/EasyPlugin/issues</url>
+    </issueManagement>
+
+    <ciManagement>
+        <system>GitHub Actions</system>
+        <url>https://github.com/CarmJos/EasyPlugin/actions/workflows/maven.yml</url>
+    </ciManagement>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

base/storage/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyplugin-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>1.4.10</version>
+        <version>1.5.5</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -23,5 +23,13 @@
     <description>轻松插件存储接口模块，包含存储相关的统一接口。</description>
     <url>https://github.com/CarmJos/EasyPlugin</url>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
 
 </project>

base/user/pom.xml

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>cc.carm.lib</groupId>
+        <artifactId>easyplugin-parent</artifactId>
+        <version>1.5.5</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+    <properties>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
+    </properties>
+    <artifactId>easyplugin-user</artifactId>
+
+    <developers>
+        <developer>
+            <id>CarmJos</id>
+            <name>Carm Jos</name>
+            <email>carm@carm.cc</email>
+            <url>https://www.carm.cc</url>
+        </developer>
+    </developers>
+
+    <licenses>
+        <license>
+            <name>The MIT License</name>
+            <url>https://opensource.org/licenses/MIT</url>
+        </license>
+    </licenses>
+
+    <issueManagement>
+        <system>GitHub Issues</system>
+        <url>https://github.com/CarmJos/EasyPlugin/issues</url>
+    </issueManagement>
+
+    <ciManagement>
+        <system>GitHub Actions</system>
+        <url>https://github.com/CarmJos/EasyPlugin/actions/workflows/maven.yml</url>
+    </ciManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>${project.parent.groupId}</groupId>
+            <artifactId>easyplugin-main</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

base/user/src/main/java/cc/carm/lib/easyplugin/user/UserData.java

@@ -0,0 +1,32 @@
+package cc.carm.lib.easyplugin.user;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Objects;
+
+public abstract class UserData<K> {
+
+    protected final @NotNull K key;
+
+    protected UserData(@NotNull K key) {
+        this.key = key;
+    }
+
+    public @NotNull K getKey() {
+        return key;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        UserData<?> userData = (UserData<?>) o;
+        return key.equals(userData.key);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(key);
+    }
+
+}

base/user/src/main/java/cc/carm/lib/easyplugin/user/UserDataManager.java

@@ -0,0 +1,245 @@
+package cc.carm.lib.easyplugin.user;
+
+import cc.carm.lib.easyplugin.EasyPlugin;
+import com.google.common.collect.ImmutableSet;
+import org.bukkit.Bukkit;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.*;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.function.Consumer;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import java.util.function.Supplier;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
+
+public abstract class UserDataManager<K, U extends UserData<K>> {
+
+    protected final @NotNull EasyPlugin plugin;
+
+    protected final @NotNull ExecutorService executor;
+    protected final @NotNull Map<K, U> dataCache;
+
+    public UserDataManager(@NotNull EasyPlugin plugin) {
+        this(plugin, Executors.newCachedThreadPool((r) -> {
+            Thread t = new Thread(r);
+            t.setDaemon(true);
+            t.setName(plugin.getName() + "-UserManager");
+            return t;
+        }), new ConcurrentHashMap<>());
+    }
+
+    public UserDataManager(@NotNull EasyPlugin plugin, @NotNull ExecutorService executor) {
+        this(plugin, executor, new ConcurrentHashMap<>());
+    }
+
+    public UserDataManager(@NotNull EasyPlugin plugin, @NotNull ExecutorService executor, @NotNull Map<K, U> cacheMap) {
+        this.plugin = plugin;
+        this.executor = executor;
+        this.dataCache = cacheMap;
+    }
+
+    public void shutdown() {
+        this.executor.shutdown();
+    }
+
+    protected @NotNull EasyPlugin getPlugin() {
+        return plugin;
+    }
+
+    protected @NotNull Logger getLogger() {
+        return getPlugin().getLogger();
+    }
+
+    public String serializeKey(@NotNull K key) {
+        return key.toString();
+    }
+
+    public abstract @NotNull U empty(@NotNull K key);
+
+    protected abstract @Nullable U loadData(@NotNull K key) throws Exception;
+
+    protected abstract void saveData(@NotNull U data) throws Exception;
+
+    public @NotNull CompletableFuture<U> load(@NotNull K key) {
+        return load(key, false);
+    }
+
+    public @NotNull CompletableFuture<U> load(@NotNull K key, boolean cache) {
+        return load(key, () -> cache);
+    }
+
+    public @NotNull Map<K, U> getDataCache() {
+        return dataCache;
+    }
+
+    @Unmodifiable
+    public @NotNull Set<U> list() {
+        return ImmutableSet.copyOf(getDataCache().values());
+    }
+
+    public @NotNull U get(@NotNull K key) {
+        return Optional.ofNullable(getNullable(key)).orElseThrow(() -> new NullPointerException("User " + key + " not found."));
+    }
+
+    public @Nullable U getNullable(@NotNull K key) {
+        return getDataCache().get(key);
+    }
+
+    public @NotNull Optional<@Nullable U> getOptional(@NotNull K key) {
+        return Optional.ofNullable(getNullable(key));
+    }
+
+    public @NotNull CompletableFuture<U> load(@NotNull K key, @NotNull Supplier<Boolean> cacheCondition) {
+        return CompletableFuture.supplyAsync(() -> {
+            String identifier = serializeKey(key);
+
+            try {
+                long s1 = System.currentTimeMillis();
+                getPlugin().debug("开始加载用户 " + identifier + " 的数据...");
+                U data = loadData(key);
+                if (data == null) {
+                    getPlugin().debug("数据库内不存在用户 " + identifier + " 的数据，视作新档案。");
+                    return empty(key);
+                } else {
+                    getPlugin().debug("加载用户 " + identifier + " 的数据完成，耗时 " + (System.currentTimeMillis() - s1) + " ms.");
+                    return data;
+                }
+            } catch (Exception ex) {
+                getPlugin().error("加载用户 " + serializeKey(key) + " 数据失败，请检查相关配置！");
+                ex.printStackTrace();
+                return empty(key);
+            }
+
+        }, executor).thenApply((data) -> {
+            if (cacheCondition.get()) dataCache.put(key, data);
+            return data;
+        });
+    }
+
+    public @NotNull CompletableFuture<Boolean> save(@NotNull U user) {
+        return CompletableFuture.supplyAsync(() -> {
+            String identifier = serializeKey(user.getKey());
+
+            try {
+                long s1 = System.currentTimeMillis();
+                getPlugin().debug("开始保存用户 " + identifier + " 的数据...");
+                saveData(user);
+                getPlugin().debug("保存用户 " + identifier + " 的数据完成，耗时 " + (System.currentTimeMillis() - s1) + " ms.");
+                return true;
+            } catch (Exception ex) {
+                getPlugin().error("保存用户 " + identifier + " 数据失败，请检查相关配置！");
+                ex.printStackTrace();
+                return false;
+            }
+
+        }, executor);
+    }
+
+    public @NotNull CompletableFuture<Boolean> unload(@NotNull K key) {
+        return unload(key, true);
+    }
+
+    public @NotNull CompletableFuture<Boolean> unload(@NotNull K key, boolean save) {
+        U data = getNullable(key);
+        if (data == null) return CompletableFuture.completedFuture(false);
+
+        if (save) {
+            return save(data).thenApply(result -> {
+                this.dataCache.remove(key);
+                return result;
+            });
+        } else {
+            this.dataCache.remove(key);
+            return CompletableFuture.completedFuture(true);
+        }
+
+    }
+
+    public @NotNull CompletableFuture<Boolean> modify(@NotNull K key, @NotNull Consumer<U> consumer) {
+        U cached = getNullable(key);
+        if (cached != null) {
+            return CompletableFuture.supplyAsync(() -> {
+                consumer.accept(cached);
+                return true;
+            }, executor);
+        } else {
+            return load(key, false).thenApply((data) -> {
+                consumer.accept(data);
+                return data;
+            }).thenCompose(this::save);
+        }
+    }
+
+    public <V> @NotNull CompletableFuture<V> peek(@NotNull K key, @NotNull Function<U, V> function) {
+        U cached = getNullable(key);
+        if (cached != null) {
+            return CompletableFuture.supplyAsync(() -> function.apply(cached), executor);
+        } else {
+            return load(key, false).thenApply(function);
+        }
+    }
+
+    public @NotNull CompletableFuture<Map<K, U>> loadOnline(@NotNull Function<Player, ? extends K> function) {
+        return loadGroup(Bukkit.getOnlinePlayers(), function, OfflinePlayer::isOnline);
+    }
+
+    public <T> @NotNull CompletableFuture<Map<K, U>> loadGroup(@NotNull Collection<? extends T> users,
+                                                               @NotNull Function<? super T, ? extends K> function,
+                                                               @NotNull Predicate<T> cacheCondition) {
+        CompletableFuture<Map<K, U>> task = CompletableFuture.completedFuture(new ConcurrentHashMap<>());
+        if (users.isEmpty()) return task;
+
+        Map<K, T> usersMap = users.stream().collect(Collectors.toMap(function, Function.identity()));
+        for (Map.Entry<K, T> entry : usersMap.entrySet()) {
+            K key = entry.getKey();
+            T user = entry.getValue();
+            task = task.thenCombine(
+                    load(key, () -> cacheCondition.test(user)),
+                    (map, result) -> {
+                        map.put(key, result);
+                        return map;
+                    }
+            );
+        }
+
+        return task.thenApply(Collections::unmodifiableMap);
+    }
+
+    public @NotNull CompletableFuture<Map<K, U>> loadGroup(@NotNull Collection<K> allKeys,
+                                                           @NotNull Predicate<K> cacheCondition) {
+        return loadGroup(allKeys, Function.identity(), cacheCondition);
+    }
+
+    public @NotNull CompletableFuture<Map<K, U>> loadGroup(@NotNull Collection<K> allKeys) {
+        return loadGroup(allKeys, (v) -> false);
+    }
+
+    public @NotNull CompletableFuture<Integer> saveAll() {
+        CompletableFuture<Integer> future = CompletableFuture.completedFuture(0);
+        if (getDataCache().isEmpty()) return future;
+
+        for (U value : getDataCache().values()) {
+            future = future.thenCombine(save(value), (before, result) -> before + (result ? 1 : 0));
+        }
+
+        return future;
+    }
+
+    public @NotNull CompletableFuture<Integer> unloadAll() {
+        return saveAll().thenApply(result -> {
+            getDataCache().clear();
+            return result;
+        });
+    }
+
+
+}

base/utils/pom.xml

@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>easyplugin-parent</artifactId>
+        <groupId>cc.carm.lib</groupId>
+        <version>1.5.5</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <properties>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
+    </properties>
+
+    <artifactId>easyplugin-utils</artifactId>
+
+    <name>EasyPlugin-Utils</name>
+    <description>轻松插件工具类模块，该模块中的内容支持在Bungee、Bukkit使用。</description>
+    <url>https://github.com/CarmJos/EasyPlugin</url>
+
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>easyplugin-color</artifactId>
+            <version>${project.version}</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+    <developers>
+        <developer>
+            <id>CarmJos</id>
+            <name>Carm Jos</name>
+            <email>carm@carm.cc</email>
+            <url>https://www.carm.cc</url>
+        </developer>
+    </developers>
+
+    <licenses>
+        <license>
+            <name>The MIT License</name>
+            <url>https://opensource.org/licenses/MIT</url>
+        </license>
+    </licenses>
+
+    <issueManagement>
+        <system>GitHub Issues</system>
+        <url>https://github.com/CarmJos/EasyPlugin/issues</url>
+    </issueManagement>
+
+    <ciManagement>
+        <system>GitHub Actions</system>
+        <url>https://github.com/CarmJos/EasyPlugin/actions/workflows/maven.yml</url>
+    </ciManagement>
+
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

base/utils/src/main/java/cc/carm/lib/easyplugin/utils/EasyCooldown.java

@@ -0,0 +1,93 @@
+package cc.carm.lib.easyplugin.utils;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.text.NumberFormat;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+/**
+ * <a href="https://gist.github.com/CarmJos/402cb5aad0ec14ab25c2fa0d21571703">Easy cooldown time utils.</a>
+ *
+ * @param <P> Cooldown key provider
+ * @param <K> Cooldown key
+ * @author CarmJos
+ */
+public class EasyCooldown<P, K> {
+
+    protected final NumberFormat numberFormatter;
+
+    protected final @NotNull Map<K, Long> cooldown = new HashMap<>();
+    protected final @NotNull Function<P, K> providerToKey;
+
+    protected long defaultDuration;
+
+    public EasyCooldown(@NotNull Function<P, K> providerToKey) {
+        this(defaultFormatter(), providerToKey, 1000L);
+    }
+
+    public EasyCooldown(@NotNull NumberFormat numberFormatter,
+                        @NotNull Function<P, K> providerToKey) {
+        this(numberFormatter, providerToKey, 1000L);
+    }
+
+    public EasyCooldown(@NotNull NumberFormat numberFormatter,
+                        @NotNull Function<P, K> providerToKey,
+                        long defaultDuration) {
+        this.numberFormatter = numberFormatter;
+        this.providerToKey = providerToKey;
+        this.defaultDuration = defaultDuration;
+    }
+
+    public long getCooldown(@NotNull P provider) {
+        Long time = this.cooldown.get(this.providerToKey.apply(provider));
+        if (time == null || time < 0) return 0;
+
+        long duration = getDuration(provider);
+        if (duration <= 0) return 0;
+
+        long past = System.currentTimeMillis() - time;
+        return duration - past;
+    }
+
+    public @NotNull String getCooldownSeconds(@NotNull P provider) {
+        return formatSeconds(getCooldown(provider));
+    }
+
+    public void updateTime(@NotNull P provider) {
+        this.cooldown.put(this.providerToKey.apply(provider), System.currentTimeMillis());
+    }
+
+    public void clear(@NotNull P provider) {
+        clearCooldown(this.providerToKey.apply(provider));
+    }
+
+    public void clearCooldown(@NotNull K key) {
+        this.cooldown.remove(key);
+    }
+
+    public boolean isCoolingDown(@NotNull P provider) {
+        return getCooldown(provider) > 0;
+    }
+
+    public long getDuration(@NotNull P provider) {
+        return this.defaultDuration;
+    }
+
+    public @NotNull String formatSeconds(long cooldownMillis) {
+        return numberFormatter.format((double) cooldownMillis / 1000D);
+    }
+
+    public static NumberFormat createFormatter(@NotNull Consumer<NumberFormat> consumer) {
+        NumberFormat format = NumberFormat.getInstance();
+        consumer.accept(format);
+        return format;
+    }
+
+    public static NumberFormat defaultFormatter() {
+        return createFormatter((f) -> f.setMaximumFractionDigits(2));
+    }
+
+}

collection/all/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyplugin-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>1.4.10</version>
+        <version>1.5.5</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -62,4 +62,14 @@
 
     </dependencies>
 
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

collection/bom/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyplugin-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>1.4.10</version>
+        <version>1.5.5</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -52,6 +52,7 @@
 
     <dependencyManagement>
         <dependencies>
+
             <dependency>
                 <groupId>${project.parent.groupId}</groupId>
                 <artifactId>easyplugin-main</artifactId>
@@ -69,7 +70,12 @@
             </dependency>
             <dependency>
                 <groupId>${project.parent.groupId}</groupId>
-                <artifactId>easyplugin-papi</artifactId>
+                <artifactId>easyplugin-storage</artifactId>
+                <version>${project.parent.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>${project.parent.groupId}</groupId>
+                <artifactId>easyplugin-placeholderapi</artifactId>
                 <version>${project.parent.version}</version>
             </dependency>
             <dependency>
@@ -77,6 +83,13 @@
                 <artifactId>easyplugin-vault</artifactId>
                 <version>${project.parent.version}</version>
             </dependency>
+
+            <dependency>
+                <groupId>${project.parent.groupId}</groupId>
+                <artifactId>easyplugin-githubchecker</artifactId>
+                <version>${project.parent.version}</version>
+            </dependency>
+
         </dependencies>
     </dependencyManagement>
 
@@ -108,4 +121,14 @@
         </dependency>
     </dependencies>
 
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

collection/common/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyplugin-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>1.4.10</version>
+        <version>1.5.5</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -68,10 +68,23 @@
                     <groupId>cc.carm.lib</groupId>
                     <artifactId>easyplugin-vault</artifactId>
                 </exclusion>
+                <exclusion>
+                    <groupId>cc.carm.lib</groupId>
+                    <artifactId>easyplugin-storage</artifactId>
+                </exclusion>
             </exclusions>
 
         </dependency>
 
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

extension/gh-checker/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyplugin-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>1.4.10</version>
+        <version>1.5.5</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -22,6 +22,7 @@
 
     <dependencies>
 
+        <!--suppress VulnerableLibrariesLocal -->
         <dependency>
             <groupId>cc.carm.lib</groupId>
             <artifactId>githubreleases4j</artifactId>
@@ -30,5 +31,13 @@
 
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
 
 </project>

extension/gh-checker/src/main/java/cc/carm/lib/easyplugin/updatechecker/GHUpdateChecker.java

@@ -1,7 +1,9 @@
 package cc.carm.lib.easyplugin.updatechecker;
 
 import cc.carm.lib.githubreleases4j.GithubReleases4J;
+import org.bukkit.Bukkit;
 import org.bukkit.plugin.Plugin;
+import org.bukkit.scheduler.BukkitTask;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
@@ -24,11 +26,15 @@ public class GHUpdateChecker {
     public static @NotNull Runnable runner(@NotNull Logger logger,
                                            @NotNull String owner, @NotNull String repo,
                                            @NotNull String currentVersion) {
-        return of(logger, owner, repo).runner(currentVersion);
+        return of(logger, owner, repo).createRunner(currentVersion);
     }
 
     public static @NotNull Runnable runner(@NotNull Plugin plugin) {
-        return of(plugin).runner(plugin.getDescription().getVersion());
+        return of(plugin).createRunner(plugin.getDescription().getVersion());
+    }
+
+    public static @NotNull BukkitTask run(@NotNull Plugin plugin) {
+        return Bukkit.getScheduler().runTaskAsynchronously(plugin, runner(plugin));
     }
 
     protected final @NotNull Logger logger;
@@ -59,7 +65,7 @@ public class GHUpdateChecker {
         }
     }
 
-    public Runnable runner(@NotNull String currentVersion) {
+    public Runnable createRunner(@NotNull String currentVersion) {
         return () -> checkUpdate(currentVersion);
     }
 

extension/papi/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyplugin-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>1.4.10</version>
+        <version>1.5.5</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -21,6 +21,7 @@
     <packaging>jar</packaging>
 
     <name>EasyPlugin-PlaceholderAPI</name>
+    <description>EasyPlugin的 PlaceholderAPI 扩展模块，提供了方便的 PlaceholderAPI 变量注册方法。</description>
 
     <dependencies>
 
@@ -32,4 +33,13 @@
 
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

extension/papi/src/main/java/cc/carm/lib/easyplugin/papi/EasyPlaceholder.java

@@ -0,0 +1,231 @@
+package cc.carm.lib.easyplugin.papi;
+
+import cc.carm.lib.easyplugin.papi.expansion.SectionExpansion;
+import cc.carm.lib.easyplugin.papi.expansion.SubExpansion;
+import cc.carm.lib.easyplugin.papi.handler.PlaceholderHandler;
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
+public class EasyPlaceholder extends PlaceholderExpansion {
+
+    protected final @NotNull String plugin;
+    protected final @NotNull SectionExpansion rootExpansion;
+
+    protected final @NotNull String name;
+    protected final @NotNull String author;
+    protected final @NotNull String version;
+
+    protected final boolean persistent;
+
+    public EasyPlaceholder(@NotNull JavaPlugin plugin, @NotNull String rootIdentifier) {
+        this(
+                plugin.getName(), true, rootIdentifier,
+                plugin.getName(), plugin.getDescription().getVersion(),
+                String.join(", ", plugin.getDescription().getAuthors())
+        );
+    }
+
+    public EasyPlaceholder(@NotNull JavaPlugin plugin, @NotNull SectionExpansion rootExpansion) {
+        this(
+                plugin.getName(), true, rootExpansion,
+                plugin.getName(), plugin.getDescription().getVersion(),
+                String.join(", ", plugin.getDescription().getAuthors())
+        );
+    }
+
+    public EasyPlaceholder(@NotNull String plugin, boolean persistent, @NotNull String rootIdentifier,
+                           @NotNull String name, @NotNull String version, @NotNull String author) {
+        super();
+        this.plugin = plugin;
+        this.name = name;
+        this.author = author;
+        this.version = version;
+        this.persistent = persistent;
+        this.rootExpansion = new SectionExpansion(this, rootIdentifier);
+    }
+
+    public EasyPlaceholder(@NotNull String plugin, boolean persistent,
+                           @NotNull SectionExpansion rootExpansion,
+                           @NotNull String name, @NotNull String version, @NotNull String author) {
+        super();
+        this.plugin = plugin;
+        this.name = name;
+        this.author = author;
+        this.version = version;
+        this.persistent = persistent;
+        this.rootExpansion = rootExpansion;
+    }
+
+    /**
+     * 得到根变量解析器
+     *
+     * @return 根变量解析器
+     */
+    public @NotNull SectionExpansion getRootExpansion() {
+        return rootExpansion;
+    }
+
+    /**
+     * 当未找到对应变量处理器时调用
+     *
+     * @param player 变量解析时的目标玩家，可能为空或不在线。
+     * @return 返回给玩家的内容
+     */
+    public String onErrorParams(@Nullable OfflinePlayer player) {
+        return "Wrong params";
+    }
+
+    /**
+     * 当变量处理器返回 NULL 值时调用
+     *
+     * @param player 变量解析时的目标玩家，可能为空或不在线。
+     * @return 返回给玩家的内容
+     */
+    public String onNullResponse(@Nullable OfflinePlayer player) {
+        return "";
+    }
+
+    /**
+     * 当变量处理器抛出异常时调用
+     *
+     * @param player    变量解析时的目标玩家，可能为空或不在线。
+     * @param expansion 抛出异常的变量处理器
+     * @param exception 异常内容
+     * @return 返回给玩家的内容
+     */
+    public String onException(@Nullable OfflinePlayer player, @NotNull SubExpansion<?> expansion, @NotNull Exception exception) {
+        exception.printStackTrace();
+        return "Error \"" + expansion.getIdentifier() + "\"";
+    }
+
+    /**
+     * 处理变量并返回对应内容。
+     *
+     * @param identifier 该变量的标识符
+     * @param handler    该变量的处理器，返回值将会被转换为字符串。
+     * @param aliases    该变量的别称
+     * @return {@link  EasyPlaceholder}
+     */
+    public final EasyPlaceholder handle(@NotNull String identifier, @NotNull PlaceholderHandler handler,
+                                        @NotNull String... aliases) {
+        this.rootExpansion.handle(identifier, handler, aliases);
+        return this;
+    }
+
+    /**
+     * 处理变量并返回对应内容。
+     *
+     * @param identifier     该变量的标识符
+     * @param handler        该变量的处理器，返回值将会被转换为字符串。
+     * @param paramsConsumer 用于提供该变量的可用参数
+     * @param aliases        该变量的别称
+     * @return {@link  EasyPlaceholder}
+     */
+    public final EasyPlaceholder handle(@NotNull String identifier, @NotNull PlaceholderHandler handler,
+                                        @NotNull Consumer<ArrayList<String>> paramsConsumer, @NotNull String... aliases) {
+        this.rootExpansion.handle(identifier, handler, paramsConsumer, aliases);
+        return this;
+    }
+
+    /**
+     * 处理变量并返回对应内容。
+     *
+     * @param identifier      该变量的标识符
+     * @param handler         该变量的处理器，返回值将会被转换为字符串。
+     * @param availableParams 该变量的可用参数
+     * @param aliases         该变量的别称
+     * @return {@link  EasyPlaceholder}
+     */
+    public final EasyPlaceholder handle(@NotNull String identifier, @NotNull PlaceholderHandler handler,
+                                        @NotNull List<String> availableParams, @NotNull String... aliases) {
+        this.rootExpansion.handle(identifier, handler, availableParams, aliases);
+        return this;
+    }
+
+    /**
+     * 处理变量并返回对应内容。
+     *
+     * @param identifier      该变量的标识符
+     * @param handler         该变量的处理器，返回值将会被转换为字符串。
+     * @param availableParams 该变量的可用参数
+     * @param aliases         该变量的别称
+     * @return {@link  EasyPlaceholder}
+     */
+    public final EasyPlaceholder handle(String identifier, @NotNull PlaceholderHandler handler,
+                                        @NotNull Supplier<List<String>> availableParams, @NotNull String... aliases) {
+        this.rootExpansion.handle(identifier, handler, availableParams, aliases);
+        return this;
+    }
+
+    /**
+     * 处理一组变量。
+     *
+     * @param section  该组变量的标识符
+     * @param consumer 该组变量的处理器操作方法
+     *                 <br> 在其中可调用 {@link SectionExpansion#handle(String, PlaceholderHandler, String...)} 方法处理子变量,
+     *                 <br> 或者调用 {@link SectionExpansion#handleSection(String, Consumer, String...)} 方法处理下一层组变量
+     * @param aliases  该变量的别称
+     * @return {@link  EasyPlaceholder}
+     */
+    public final EasyPlaceholder handleSection(@NotNull String section,
+                                               @NotNull Consumer<SectionExpansion> consumer,
+                                               @NotNull String... aliases) {
+        this.rootExpansion.handleSection(section, consumer, aliases);
+        return this;
+    }
+
+    @Override
+    public String onRequest(@Nullable OfflinePlayer player, @NotNull String params) {
+        String[] args = params.split("_");
+        if (args.length == 0) return onErrorParams(player);
+
+        Object response = rootExpansion.handleRequest(player, args);
+        if (response == null) return onNullResponse(player);
+        else return response.toString();
+    }
+
+    @Override
+    public @Nullable String getRequiredPlugin() {
+        return this.plugin;
+    }
+
+    @Override
+    public @NotNull String getIdentifier() {
+        return this.rootExpansion.getIdentifier();
+    }
+
+    @Override
+    public @NotNull String getAuthor() {
+        return this.author;
+    }
+
+    @Override
+    public @NotNull String getVersion() {
+        return this.version;
+    }
+
+    @Override
+    public @NotNull String getName() {
+        return this.name;
+    }
+
+    @Override
+    public @NotNull List<String> getPlaceholders() {
+        return this.rootExpansion.listPlaceholders();
+    }
+
+    @Override
+    public boolean persist() {
+        return this.persistent;
+    }
+
+
+}

extension/papi/src/main/java/cc/carm/lib/easyplugin/papi/expansion/EasyExpansion.java

@@ -0,0 +1,13 @@
+package cc.carm.lib.easyplugin.papi.expansion;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+public interface EasyExpansion {
+    
+    @NotNull String getIdentifier();
+
+    @NotNull List<String> getAliases();
+
+}

extension/papi/src/main/java/cc/carm/lib/easyplugin/papi/expansion/SectionExpansion.java

@@ -0,0 +1,219 @@
+package cc.carm.lib.easyplugin.papi.expansion;
+
+import cc.carm.lib.easyplugin.papi.EasyPlaceholder;
+import cc.carm.lib.easyplugin.papi.handler.PlaceholderHandler;
+import org.bukkit.OfflinePlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.*;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
+public class SectionExpansion implements EasyExpansion {
+
+    protected final EasyPlaceholder root;
+
+    protected final @NotNull String identifier;
+    protected final @NotNull List<String> aliases;
+
+    protected final @NotNull Map<String, SectionExpansion> registeredSections = new HashMap<>();
+    protected final @NotNull Map<String, SubExpansion<?>> registeredExpansions = new HashMap<>();
+
+    protected final @NotNull Map<String, String> aliasesMap = new HashMap<>();
+
+    public SectionExpansion(@NotNull EasyPlaceholder root,
+                            @NotNull String identifier, @NotNull String... aliases) {
+        this(root, identifier, Arrays.asList(aliases));
+    }
+
+    public SectionExpansion(@NotNull EasyPlaceholder root,
+                            @NotNull String identifier, @NotNull List<String> aliases) {
+        this.root = root;
+        this.identifier = identifier;
+        this.aliases = aliases;
+    }
+
+    public EasyPlaceholder getRoot() {
+        return root;
+    }
+
+    @NotNull
+    @Override
+    public String getIdentifier() {
+        return identifier;
+    }
+
+    @Override
+    public @NotNull List<String> getAliases() {
+        return this.aliases;
+    }
+
+    public void register(@NotNull SubExpansion<?> placeholder) {
+        String name = placeholder.getIdentifier().toLowerCase();
+        this.registeredExpansions.put(name, placeholder);
+        placeholder.getAliases().forEach(alias -> this.aliasesMap.put(alias.toLowerCase(), name));
+    }
+
+    public final void register(@NotNull SectionExpansion placeholder) {
+        String name = placeholder.getIdentifier().toLowerCase();
+        this.registeredSections.put(name, placeholder);
+        placeholder.getAliases().forEach(alias -> this.aliasesMap.put(alias.toLowerCase(), name));
+    }
+
+    /**
+     * 处理变量并返回对应内容。
+     *
+     * @param identifier 该变量的标识符
+     * @param handler    该变量的处理器，返回值将会被转换为字符串。
+     * @param aliases    该变量的别称
+     */
+    public final void handle(@NotNull String identifier, @NotNull PlaceholderHandler handler,
+                             @NotNull String... aliases) {
+        handle(identifier, handler, Collections.emptyList(), aliases);
+    }
+
+    /**
+     * 处理变量并返回对应内容。
+     *
+     * @param identifier     该变量的标识符
+     * @param handler        该变量的处理器，返回值将会被转换为字符串。
+     * @param paramsConsumer 用于提供该变量的可用参数
+     * @param aliases        该变量的别称
+     */
+    public final void handle(@NotNull String identifier, @NotNull PlaceholderHandler handler,
+                             @NotNull Consumer<ArrayList<String>> paramsConsumer, @NotNull String... aliases) {
+        handle(identifier, handler, () -> {
+            ArrayList<String> params = new ArrayList<>();
+            paramsConsumer.accept(params);
+            return params;
+        }, aliases);
+    }
+
+    /**
+     * 处理变量并返回对应内容。
+     *
+     * @param identifier      该变量的标识符
+     * @param handler         该变量的处理器，返回值将会被转换为字符串。
+     * @param availableParams 该变量的可用参数
+     * @param aliases         该变量的别称
+     */
+    public final void handle(@NotNull String identifier, @NotNull PlaceholderHandler handler,
+                             @NotNull List<String> availableParams, @NotNull String... aliases) {
+        handle(identifier, handler, () -> availableParams, aliases);
+    }
+
+    /**
+     * 处理变量并返回对应内容。
+     *
+     * @param identifier      该变量的标识符
+     * @param handler         该变量的处理器，返回值将会被转换为字符串。
+     * @param availableParams 该变量的可用参数
+     * @param aliases         该变量的别称
+     */
+    public final void handle(@NotNull String identifier, @NotNull PlaceholderHandler handler,
+                             @NotNull Supplier<List<String>> availableParams, @NotNull String... aliases) {
+        register(new SubExpansion<SectionExpansion>(this, identifier, aliases) {
+            @Override
+            public Object handle(@Nullable OfflinePlayer player, @NotNull String[] args) throws Exception {
+                return handler.handle(player, args);
+            }
+
+            @Override
+            public List<String> listAvailableParams() {
+                return availableParams.get();
+            }
+        });
+    }
+
+    /**
+     * 处理一组变量。
+     *
+     * @param section  该组变量的标识符
+     * @param consumer 该组变量的处理器操作方法
+     *                 <br> 在其中可调用 {@link SectionExpansion#handle(String, PlaceholderHandler, String...)} 方法处理子变量,
+     *                 <br> 或者调用 {@link SectionExpansion#handleSection(String, Consumer, String...)} 方法处理下一层组变量
+     * @param aliases  该变量的别称
+     */
+    public final void handleSection(@NotNull String section, @NotNull Consumer<SectionExpansion> consumer,
+                                    @NotNull String... aliases) {
+        SectionExpansion sectionExpansion = new SectionExpansion(getRoot(), section, aliases);
+        consumer.accept(sectionExpansion);
+        register(sectionExpansion);
+    }
+
+    public final @Nullable Object handleRequest(@Nullable OfflinePlayer player, @NotNull String[] args) {
+        if (args.length == 0) return getRoot().onErrorParams(player);
+        String input = args[0].toLowerCase();
+
+        SectionExpansion group = getHandler(input);
+        if (group != null) return group.handleRequest(player, this.shortenArgs(args));
+
+        SubExpansion<?> sub = getSubPlaceholder(input);
+        if (sub == null) return getRoot().onErrorParams(player);
+
+        try {
+            return sub.handle(player, this.shortenArgs(args));
+        } catch (Exception ex) {
+            return getRoot().onException(player, sub, ex);
+        }
+    }
+
+    public List<String> listPlaceholders() {
+        List<String> placeholders = new ArrayList<>();
+
+        String currentID = getIdentifier();
+
+        for (SectionExpansion section : this.registeredSections.values()) {
+            for (String groupID : section.listPlaceholders()) {
+                placeholders.add(currentID + "_" + groupID);
+            }
+        }
+
+        for (SubExpansion<?> placeholder : this.registeredExpansions.values()) {
+            String identifier = placeholder.getIdentifier();
+
+            List<String> params = placeholder.listAvailableParams();
+            if (params.isEmpty()) {
+                placeholders.add(currentID + "_" + identifier);
+                continue;
+            }
+
+            for (String param : params) {
+                placeholders.add(currentID + "_" + identifier + "_" + param);
+            }
+
+        }
+
+        return placeholders;
+    }
+
+
+    protected @Nullable SectionExpansion getHandler(@NotNull String name) {
+        SectionExpansion fromName = this.registeredSections.get(name);
+        if (fromName != null) return fromName;
+
+        String nameFromAlias = this.aliasesMap.get(name);
+        if (nameFromAlias == null) return null;
+        else return this.registeredSections.get(nameFromAlias);
+    }
+
+    protected @Nullable SubExpansion<?> getSubPlaceholder(@NotNull String name) {
+        SubExpansion<?> fromName = this.registeredExpansions.get(name);
+        if (fromName != null) return fromName;
+
+        String nameFromAlias = this.aliasesMap.get(name);
+        if (nameFromAlias == null) return null;
+        else return this.registeredExpansions.get(nameFromAlias);
+    }
+
+    protected String[] shortenArgs(String[] args) {
+        if (args.length == 0) {
+            return args;
+        } else {
+            List<String> argList = new ArrayList<>(Arrays.asList(args).subList(1, args.length));
+            return argList.toArray(new String[0]);
+        }
+    }
+
+}

extension/papi/src/main/java/cc/carm/lib/easyplugin/papi/expansion/SubExpansion.java

@@ -0,0 +1,44 @@
+package cc.carm.lib.easyplugin.papi.expansion;
+
+import org.bukkit.OfflinePlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public abstract class SubExpansion<PARENT extends SectionExpansion> implements EasyExpansion {
+
+    protected final @NotNull PARENT parent;
+    protected final @NotNull String identifier;
+    protected final @NotNull List<String> aliases;
+
+    public SubExpansion(@NotNull PARENT parent,
+                        @NotNull String identifier, @NotNull String... aliases) {
+        this.parent = parent;
+        this.identifier = identifier;
+        this.aliases = Arrays.asList(aliases);
+    }
+
+    public abstract Object handle(@Nullable OfflinePlayer player, @NotNull String[] args) throws Exception;
+
+    /**
+     * 用于提示此子变量的全部可用参数
+     *
+     * @return 该子变量的全部可用参数
+     */
+    public List<String> listAvailableParams() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public @NotNull String getIdentifier() {
+        return this.identifier;
+    }
+
+    @Override
+    public @NotNull List<String> getAliases() {
+        return this.aliases;
+    }
+}

extension/papi/src/main/java/cc/carm/lib/easyplugin/papi/handler/PlaceholderHandler.java

@@ -0,0 +1,12 @@
+package cc.carm.lib.easyplugin.papi.handler;
+
+import org.bukkit.OfflinePlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+@FunctionalInterface
+public interface PlaceholderHandler {
+
+    @Nullable Object handle(@Nullable OfflinePlayer player, @NotNull String[] args) throws Exception;
+
+}

extension/papi/src/test/java/cc/carm/tests/easyplugin/papi/DemoPlaceholder.java

@@ -0,0 +1,77 @@
+package cc.carm.tests.easyplugin.papi;
+
+import cc.carm.lib.easyplugin.papi.EasyPlaceholder;
+import cc.carm.lib.easyplugin.papi.expansion.SubExpansion;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.PlayerInventory;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Arrays;
+import java.util.Objects;
+
+public class DemoPlaceholder extends EasyPlaceholder {
+
+    public DemoPlaceholder() {
+        super(
+                "TestPlugin", true, "TestPlaceholder",
+                "TestPlugin", "1.0.0", "Carm"
+        );
+
+        handle("version", (player, args) -> "1.0.0", "ver", "v");
+        handleSection("game", (section) -> {
+
+            // 即处理 %TestPlaceholder_game_items%
+            section.handle("items", ((player, args) -> {
+                if (player == null || !player.isOnline() || !(player instanceof Player)) return -1;
+                PlayerInventory inv = ((Player) player).getInventory();
+                return Arrays.stream(inv.getContents())
+                        .filter(Objects::nonNull)
+                        .mapToInt(ItemStack::getAmount)
+                        .count();
+            }));
+
+            // 即处理 %TestPlaceholder_game_location% 或 %TestPlaceholder_game_loc%
+            section.handle("location", (player, args) -> {
+                if (player == null || !player.isOnline() || !(player instanceof Player)) return "Unknown";
+                return ((Player) player).getLocation();
+            }, "loc" /* 声明此变量的别称*/);
+
+            // 即处理 %TestPlaceholder_game_time%
+            section.handle("time", (player, args) -> System.currentTimeMillis());
+
+            section.handle("random",
+                    (player, args) -> {
+                        if (args.length == 0) return Math.random();
+                        else if (args.length == 1) return Math.random() * Double.parseDouble(args[0]);
+                        else if (args.length == 2) {
+                            return Math.random() * (Double.parseDouble(args[1]) - Double.parseDouble(args[0])) + Double.parseDouble(args[0]);
+                        } else return onErrorParams(player);
+                    },
+                    (params) -> {
+                        params.add("<最小值>_<最大值>");
+                        params.add("<基础值(乘随机数)>");
+                    });
+
+        }, "g");
+
+    }
+
+    @Override
+    public String onErrorParams(@Nullable OfflinePlayer player) {
+        return super.onErrorParams(player);
+    }
+
+    @Override
+    public String onNullResponse(@Nullable OfflinePlayer player) {
+        return super.onNullResponse(player);
+    }
+
+    @Override
+    public String onException(@Nullable OfflinePlayer player, @NotNull SubExpansion<?> expansion, @NotNull Exception exception) {
+        return super.onException(player, expansion, exception);
+    }
+
+}

extension/papi/src/test/java/cc/carm/tests/easyplugin/papi/PlaceholderTest.java

@@ -0,0 +1,37 @@
+package cc.carm.tests.easyplugin.papi;
+
+import cc.carm.lib.easyplugin.papi.EasyPlaceholder;
+import org.junit.Test;
+
+public class PlaceholderTest {
+
+
+    @Test
+    public void onTest() {
+        DemoPlaceholder placeholder = new DemoPlaceholder();
+
+        System.out.println("# Placeholders");
+        placeholder.getPlaceholders().forEach(s -> System.out.println(" -> " + s));
+
+        System.out.println();
+        System.out.println("# Request tests");
+
+        test(placeholder, "game_items");
+        test(placeholder, "g_time");
+        test(placeholder, "game_loc");
+        test(placeholder, "ver");
+
+        test(placeholder, "game_random");
+        test(placeholder, "game_random_0_5");
+        test(placeholder, "game_random_100");
+
+        System.out.println("# Error tests");
+        test(placeholder, "game_random_try");
+    }
+
+    private void test(EasyPlaceholder placeholder, String input) {
+        System.out.println(" " + input + " -> " + placeholder.onRequest(null, input));
+    }
+
+
+}

extension/vault/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyplugin-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>1.4.10</version>
+        <version>1.5.5</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -33,4 +33,14 @@
 
     </dependencies>
 
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

pom.xml

@@ -15,12 +15,18 @@
     <groupId>cc.carm.lib</groupId>
     <artifactId>easyplugin-parent</artifactId>
     <packaging>pom</packaging>
-    <version>1.4.10</version>
+    <version>1.5.5</version>
     <modules>
+        <module>base/color</module>
+        <module>base/utils</module>
 
         <module>base/main</module>
-        <module>base/command</module>
+        <module>base/messages</module>
         <module>base/gui</module>
+        <module>base/command</module>
+        <module>base/command-alias</module>
+        <module>base/storage</module>
+        <module>base/user</module>
 
         <module>extension/papi</module>
         <module>extension/vault</module>
@@ -29,7 +35,6 @@
         <module>collection/all</module>
         <module>collection/bom</module>
         <module>collection/common</module>
-        <module>base/storage</module>
 
     </modules>
 
@@ -103,7 +108,7 @@
 
         <dependency>
             <groupId>org.spigotmc</groupId>
-            <artifactId>spigot</artifactId>
+            <artifactId>spigot-api</artifactId>
             <version>1.13.2-R0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
@@ -141,6 +146,21 @@
                 <artifactId>githubreleases4j</artifactId>
                 <version>1.3.1</version>
             </dependency>
+            <dependency>
+                <groupId>cc.carm.lib</groupId>
+                <artifactId>easylistener</artifactId>
+                <version>2.0.1</version>
+            </dependency>
+            <dependency>
+                <groupId>cc.carm.lib</groupId>
+                <artifactId>mineconfiguration-bukkit</artifactId>
+                <version>2.0.2</version>
+            </dependency>
+            <dependency>
+                <groupId>cc.carm.lib</groupId>
+                <artifactId>easysql-beecp</artifactId>
+                <version>0.4.3</version>
+            </dependency>
         </dependencies>
     </dependencyManagement>
 
@@ -187,6 +207,37 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-gpg-plugin</artifactId>
+                <version>3.0.1</version>
+                <executions>
+                    <execution>
+                        <id>sign-artifacts</id>
+                        <phase>verify</phase>
+                        <goals>
+                            <goal>sign</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <gpgArguments>
+                        <arg>--pinentry-mode</arg>
+                        <arg>loopback</arg>
+                    </gpgArguments>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-release-plugin</artifactId>
+                <version>2.5.3</version>
+                <configuration>
+                    <autoVersionSubmodules>true</autoVersionSubmodules>
+                    <useReleaseProfile>false</useReleaseProfile>
+                    <releaseProfiles>release</releaseProfiles>
+                    <goals>deploy</goals>
+                </configuration>
+            </plugin>
         </plugins>
         <pluginManagement>
             <plugins>