Question

我正在编写本质上是我的第一个Maven插件，所以这可能只是缺乏Google技能，但这是可行的。

我正在使用maven-plugin-plugin创建插件

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-plugin-plugin</artifactId>
            <version>3.5.2</version>
            <executions>
                <execution>
                    <id>default-descriptor</id>
                    <phase>process-classes</phase>
                </execution>
            </executions>
        </plugin>

我正在使用Maven 3.5.2。版本。

该插件项目构建良好，但是当我尝试在另一个项目中使用它时，此错误失败：

Caused by: java.lang.ClassNotFoundException: org.sonatype.aether.graph.Dependency
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass (SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass (ClassRealm.java:271)
....(Lots of google.inject stuff)....
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo (DefaultMavenPluginManager.java:519)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:121)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:309)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)

进行了一些糊涂之后，我发现了这个stackoverflow post，但我并没有完全理解，但是我确实查看了bugreport并更改了我的Dependency插件版本（在插件项目和Consumer项目中，因为我不知道我在做什么:)）

错误仍然以不变的形式存在。该错误发生在正在运行我的插件的generatesources阶段，删除该插件会使错误消失，所以我可以肯定我的插件应该受到指责。

有人可以简单地解释发生了什么，并帮助我解决问题吗？谢谢你。

这是整个插件POM

<project>
<modelVersion>4.0.0</modelVersion>

<groupId>...</groupId>
<artifactId>...</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>maven-plugin</packaging>

<name>...</name>

<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
</properties>



<dependencies>
    <dependency>
        <groupId>org.apache.maven</groupId>
        <artifactId>maven-plugin-api</artifactId>
        <version>3.5.2</version>
    </dependency>

    <!-- dependencies to annotations -->
    <dependency>
        <groupId>org.apache.maven.plugin-tools</groupId>
        <artifactId>maven-plugin-annotations</artifactId>
        <version>3.5.2</version>
        <scope>provided</scope>
    </dependency>


    <dependency>
        <groupId>org.apache.maven</groupId>
        <artifactId>maven-core</artifactId>
        <version>3.5.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.maven.shared</groupId>
        <artifactId>maven-dependency-tree</artifactId>
        <version>3.0.1</version>
    </dependency>

    <dependency>
        <groupId>org.alfresco</groupId>
        <artifactId>alfresco-data-model</artifactId>
        <version>5.1.g</version>
    </dependency>

    <dependency>
        <groupId>org.apache.maven</groupId>
        <artifactId>maven-project</artifactId>
        <version>2.2.1</version>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>com.squareup</groupId>
        <artifactId>javapoet</artifactId>
        <version>1.11.1</version>
    </dependency>



    <dependency>
        <artifactId>junit</artifactId>
        <groupId>junit</groupId>
        <version>4.11</version>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
    <plugin>
      <artifactId>maven-dependency-plugin</artifactId>
      <version>2.9</version>
    </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-plugin-plugin</artifactId>
            <version>3.5.2</version>
            <executions>
                <execution>
                    <id>default-descriptor</id>
                    <phase>process-classes</phase>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

编辑：我尝试添加

    <dependency>
        <groupId>org.sonatype.aether</groupId>
        <artifactId>aether-api</artifactId>
        <version>1.8</version>
    </dependency>
    <dependency>
        <groupId>org.sonatype.aether</groupId>
        <artifactId>aether-util</artifactId>
        <version>1.8</version>
    </dependency>

但是问题仍然存在。我也尝试将其添加到两个项目中。结果相同。

Answer 1

您应该将以太api依赖项添加到插件pom中：

   <dependency>
      <groupId>org.sonatype.aether</groupId>
      <artifactId>aether-api</artifactId>
    </dependency>

自定义Maven插件执行失败并显示classnotfound

1 个答案: