Maven阴影多模块聚合和继承

时间：2020-04-10 01:08:10

标签： java maven maven-shade-plugin

上下文

我有一个带有多个模块的IntelliJ项目。我正在使用maven-shade-plugin来添加具有依赖性的jar，同时减小jar的大小。项目结构如下；

  • 顶级父项（pom）（汇总api和world-portleport）
    • api（继承其父级）
    • world-teleport（继承其父级api）

绒球

父母

   <groupId>com.jsonmack</groupId>
    <artifactId>mcplugins</artifactId>
    <packaging>pom</packaging>
    <version>1.10-SNAPSHOT</version>

    <repositories>
        <repository>
            <id>spigot-repo</id>
            <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
        </repository>
    </repositories>

    <modules>
        <module>api</module>
        <module>world-teleport</module>
    </modules>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
                <version>3.8.1</version>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.2</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <minimizeJar>true</minimizeJar>
                            <artifactSet>
                                <excludes>
                                    <exclude>junit:junit</exclude>
                                </excludes>
                            </artifactSet>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>io.github.classgraph</groupId>
                <artifactId>classgraph</artifactId>
                <version>4.8.68</version>
            </dependency>

            <dependency>
                <groupId>org.spigotmc</groupId>
                <artifactId>spigot-api</artifactId>
                <version>1.15.2-R0.1-SNAPSHOT</version>
            </dependency>

            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.13</version>
                <scope>test</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

api 

    <parent>
        <artifactId>mcplugins</artifactId>
        <groupId>com.jsonmack</groupId>
        <version>1.10-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>
    <artifactId>api</artifactId>
    <packaging>jar</packaging>

    <dependencies>
        <dependency>
            <groupId>io.github.classgraph</groupId>
            <artifactId>classgraph</artifactId>
        </dependency>

        <dependency>
            <groupId>org.spigotmc</groupId>
            <artifactId>spigot-api</artifactId>
        </dependency>
    </dependencies>

世界电信

   <parent>
        <groupId>com.jsonmack</groupId>
        <artifactId>mcplugins</artifactId>
        <version>1.10-SNAPSHOT</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>com.jsonmack</groupId>
            <artifactId>api</artifactId>
            <version>1.10-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>io.github.classgraph</groupId>
            <artifactId>classgraph</artifactId>
        </dependency>

        <dependency>
            <groupId>org.spigotmc</groupId>
            <artifactId>spigot-api</artifactId>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>
    </dependencies>

问题

每次我执行全新安装或打包时，都会向我表明存在重复的依赖关系。

错误/警告

[INFO] 
[INFO] --------------------< com.jsonmack:world_teleport >---------------------
[INFO] Building world_teleport 1.8-SNAPSHOT                               [7/7]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ world_teleport ---
[INFO] Deleting /Users/Business/Documents/workspace/mcplugins/world_teleport/target
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ world_teleport ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 2 resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ world_teleport ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 19 source files to /Users/Business/Documents/workspace/mcplugins/world_teleport/target/classes
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ world_teleport ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /Users/Business/Documents/workspace/mcplugins/world_teleport/src/test/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ world_teleport ---
[INFO] Changes detected - recompiling the module!
[INFO] 
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ world_teleport ---
[INFO] 
[INFO] --- maven-jar-plugin:3.2.0:jar (default-jar) @ world_teleport ---
[INFO] Building jar: /Users/Business/Documents/workspace/mcplugins/world_teleport/target/world_teleport-1.8-SNAPSHOT.jar
[INFO] 
[INFO] --- maven-shade-plugin:3.2.2:shade (default) @ world_teleport ---
[INFO] Including com.jsonmack:api:jar:1.10-SNAPSHOT in the shaded jar.
[INFO] Including io.github.classgraph:classgraph:jar:4.8.68 in the shaded jar.
[INFO] Including org.spigotmc:spigot-api:jar:1.15.2-R0.1-SNAPSHOT in the shaded jar.
[INFO] Including commons-lang:commons-lang:jar:2.6 in the shaded jar.
[INFO] Including com.google.guava:guava:jar:21.0 in the shaded jar.
[INFO] Including com.google.code.gson:gson:jar:2.8.0 in the shaded jar.
[INFO] Including net.md-5:bungeecord-chat:jar:1.15-SNAPSHOT in the shaded jar.
[INFO] Including org.yaml:snakeyaml:jar:1.25 in the shaded jar.
[INFO] Minimizing jar com.jsonmack:world_teleport:jar:1.8-SNAPSHOT
[WARNING] /Users/Business/Documents/workspace/mcplugins/world_teleport/target/classes (Is a directory)
[WARNING] api-1.10-SNAPSHOT.jar, snakeyaml-1.25.jar define 207 overlapping classes and resources: 
[WARNING]   - META-INF/maven/org.yaml/snakeyaml/pom.properties
[WARNING]   - META-INF/maven/org.yaml/snakeyaml/pom.xml
[WARNING]   - org.yaml.snakeyaml.DumperOptions
[WARNING]   - org.yaml.snakeyaml.DumperOptions$FlowStyle
[WARNING]   - org.yaml.snakeyaml.DumperOptions$LineBreak
[WARNING]   - org.yaml.snakeyaml.DumperOptions$NonPrintableStyle
[WARNING]   - org.yaml.snakeyaml.DumperOptions$ScalarStyle
[WARNING]   - org.yaml.snakeyaml.DumperOptions$Version
[WARNING]   - org.yaml.snakeyaml.LoaderOptions
[WARNING]   - org.yaml.snakeyaml.TypeDescription
[WARNING]   - 197 more...
[WARNING] api-1.10-SNAPSHOT.jar, guava-21.0.jar define 931 overlapping classes and resources: 
[WARNING]   - META-INF/maven/com.google.guava/guava/pom.properties
[WARNING]   - META-INF/maven/com.google.guava/guava/pom.xml
[WARNING]   - com.google.common.annotations.Beta
[WARNING]   - com.google.common.annotations.GwtCompatible
[WARNING]   - com.google.common.annotations.GwtIncompatible
[WARNING]   - com.google.common.annotations.VisibleForTesting
[WARNING]   - com.google.common.base.Absent
[WARNING]   - com.google.common.base.AbstractIterator
[WARNING]   - com.google.common.base.AbstractIterator$1
[WARNING]   - com.google.common.base.AbstractIterator$State
[WARNING]   - 921 more...
[WARNING] api-1.10-SNAPSHOT.jar, gson-2.8.0.jar define 161 overlapping classes and resources: 
[WARNING]   - META-INF/maven/com.google.code.gson/gson/pom.properties
[WARNING]   - META-INF/maven/com.google.code.gson/gson/pom.xml
[WARNING]   - com.google.gson.ExclusionStrategy
[WARNING]   - com.google.gson.FieldAttributes
[WARNING]   - com.google.gson.FieldNamingPolicy
[WARNING]   - com.google.gson.FieldNamingPolicy$1
[WARNING]   - com.google.gson.FieldNamingPolicy$2
[WARNING]   - com.google.gson.FieldNamingPolicy$3
[WARNING]   - com.google.gson.FieldNamingPolicy$4
[WARNING]   - com.google.gson.FieldNamingPolicy$5
[WARNING]   - 151 more...
[WARNING] api-1.10-SNAPSHOT.jar, bungeecord-chat-1.15-SNAPSHOT.jar define 17 overlapping classes and resources: 
[WARNING]   - META-INF/maven/net.md-5/bungeecord-chat/pom.properties
[WARNING]   - META-INF/maven/net.md-5/bungeecord-chat/pom.xml
[WARNING]   - mojang-translations/en_US.properties
[WARNING]   - mojang-translations/en_us.json
[WARNING]   - net.md_5.bungee.api.ChatColor
[WARNING]   - net.md_5.bungee.api.ChatMessageType
[WARNING]   - net.md_5.bungee.api.chat.BaseComponent
[WARNING]   - net.md_5.bungee.api.chat.ClickEvent
[WARNING]   - net.md_5.bungee.api.chat.ClickEvent$Action
[WARNING]   - net.md_5.bungee.api.chat.ComponentBuilder
[WARNING]   - 7 more...
[WARNING] api-1.10-SNAPSHOT.jar, commons-lang-2.6.jar define 63 overlapping classes and resources: 
[WARNING]   - META-INF/LICENSE.txt
[WARNING]   - META-INF/NOTICE.txt
[WARNING]   - META-INF/maven/commons-lang/commons-lang/pom.properties
[WARNING]   - META-INF/maven/commons-lang/commons-lang/pom.xml
[WARNING]   - org.apache.commons.lang.ArrayUtils
[WARNING]   - org.apache.commons.lang.BooleanUtils
[WARNING]   - org.apache.commons.lang.CharRange
[WARNING]   - org.apache.commons.lang.CharRange$1
[WARNING]   - org.apache.commons.lang.CharRange$CharacterIterator
[WARNING]   - org.apache.commons.lang.CharSet
[WARNING]   - 53 more...
[WARNING] api-1.10-SNAPSHOT.jar, bungeecord-chat-1.15-SNAPSHOT.jar, classgraph-4.8.68.jar, commons-lang-2.6.jar, gson-2.8.0.jar, guava-21.0.jar, snakeyaml-1.25.jar, spigot-api-1.15.2-R0.1-SNAPSHOT.jar, world_teleport-1.8-SNAPSHOT.jar define 1 overlapping resources: 
[WARNING]   - META-INF/MANIFEST.MF
[WARNING] api-1.10-SNAPSHOT.jar, spigot-api-1.15.2-R0.1-SNAPSHOT.jar define 710 overlapping classes and resources: 
[WARNING]   - META-INF/maven/org.spigotmc/spigot-api/pom.properties
[WARNING]   - META-INF/maven/org.spigotmc/spigot-api/pom.xml
[WARNING]   - org.bukkit.Art
[WARNING]   - org.bukkit.Axis
[WARNING]   - org.bukkit.BanEntry
[WARNING]   - org.bukkit.BanList
[WARNING]   - org.bukkit.BanList$Type
[WARNING]   - org.bukkit.BlockChangeDelegate
[WARNING]   - org.bukkit.Bukkit
[WARNING]   - org.bukkit.ChatColor
[WARNING]   - 700 more...
[WARNING] api-1.10-SNAPSHOT.jar, classgraph-4.8.68.jar define 228 overlapping classes and resources: 
[WARNING]   - LICENSE-ClassGraph.txt
[WARNING]   - META-INF.versions.9.module-info
[WARNING]   - META-INF/maven/io.github.classgraph/classgraph/pom.properties
[WARNING]   - META-INF/maven/io.github.classgraph/classgraph/pom.xml
[WARNING]   - io.github.classgraph.AnnotationClassRef
[WARNING]   - io.github.classgraph.AnnotationEnumValue
[WARNING]   - io.github.classgraph.AnnotationInfo
[WARNING]   - io.github.classgraph.AnnotationInfo$AnnotationInvocationHandler
[WARNING]   - io.github.classgraph.AnnotationInfoList
[WARNING]   - io.github.classgraph.AnnotationInfoList$AnnotationInfoFilter
[WARNING]   - 218 more...
[WARNING] maven-shade-plugin has detected that some class files are
[WARNING] present in two or more JARs. When this happens, only one
[WARNING] single version of the class is copied to the uber jar.
[WARNING] Usually this is not harmful and you can skip these warnings,
[WARNING] otherwise try to manually exclude artifacts based on
[WARNING] mvn dependency:tree -Ddetail=true and the above output.
[WARNING] See http://maven.apache.org/plugins/maven-shade-plugin/
[INFO] Minimized 6106 -> 4706 (77%)

问题

是什么导致此警告？如果我的Maven Pom结构有问题怎么办？

重复问题

如果这是一个重复的问题，请随时提供任何资源，我们将不胜感激。

4 个答案:

答案 0 :(得分：1)

我认为问题在于您在api和module-1中还添加了io.github.classgraph和org.spigotmc依赖项。

那会发生什么：

  1. api模块将使用以下命令生成jar工件 io.github.classgraph和其中包含的org.spigotmc依赖项。
  2. 取决于api模块的module-1模块将导入 jar文件。
  3. 现在module-1模块具有io.github.classgraph和org.spigotmc依赖性 从jar中，然后在module-1模块的 pom.xml文件。

因此解决方案是从模块1模块pom.xml中删除io.github.classgraph和org.spigotmc依赖项：

<parent>
    <groupId>com.jsonmack</groupId>
    <artifactId>mcplugins</artifactId>
    <version>1.10-SNAPSHOT</version>
</parent>

<dependencies>
    <dependency>
        <groupId>com.jsonmack</groupId>
        <artifactId>api</artifactId>
        <version>1.10-SNAPSHOT</version>
    </dependency>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
    </dependency>
</dependencies>

答案 1 :(得分：1)

在这里，我要感谢您的积极主动，他注意到许多开发人员不断增加标准并且不理会此类警告。

回答我的问题，因为您有三个不同的模块。这些模块会以不同的方式（独立地）部署还是一起部署在一个战争，罐子或包裹中？

如果您的回答是“是”，则无需担心。

如果答案为否，那么 我认为io.github依赖项是多余的，只是摆脱它。

从子模块或引用的模块中删除冗余依赖关系。

很抱歉，如果有错别字，可以通过手机回答，但会为您完成工作。

答案 2 :(得分：1)

另一个想法： 尝试同时从父pom中删除io.github.classgraph和org.spigotmc依赖项。

父母

<groupId>com.jsonmack</groupId>
<artifactId>mcplugins</artifactId>
<packaging>pom</packaging>
<version>1.10-SNAPSHOT</version>

<repositories>
    <repository>
        <id>spigot-repo</id>
        <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
    </repository>
</repositories>

<modules>
    <module>api</module>
    <module>world-teleport</module>
</modules>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
            <version>3.8.1</version>
        </plugin>

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>3.2.2</version>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                    <configuration>
                        <minimizeJar>true</minimizeJar>
                        <artifactSet>
                            <excludes>
                                <exclude>junit:junit</exclude>
                            </excludes>
                        </artifactSet>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

世界电信

<parent>
    <groupId>com.jsonmack</groupId>
    <artifactId>mcplugins</artifactId>
    <version>1.10-SNAPSHOT</version>
</parent>

<dependencies>
    <dependency>
        <groupId>com.jsonmack</groupId>
        <artifactId>api</artifactId>
        <version>1.10-SNAPSHOT</version>
    </dependency>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
    </dependency>
</dependencies>

答案 3 :(得分：1)

谢谢大家的帮助。我已经找到了解决方案，即API模块应该从父类继承诸如spigot和classgraph之类的依赖项，但仅应提供这些依赖项的范围。这样可以编译依赖项，但在着色时将其从包装中排除。这是可能的，因为将不会在这些模块之外使用API​​，因此API将始终具有其他模块所需的依赖关系。

api-module.pom 

    <dependencies>
        <dependency>
            <groupId>io.github.classgraph</groupId>
            <artifactId>classgraph</artifactId>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.spigotmc</groupId>
            <artifactId>spigot-api</artifactId>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
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