Maven执行目标org.apache.maven.plugins:maven-jar-plugin失败。

就像下面,我在运行 mvn package

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-jar-plugin:2.3.1:jar (default-jar) on project hello-world: Execution default-jar of goal org.apache.maven.plugins:maven-jar-plugin:2.3.1:jar failed: Unable to load the mojo 'jar' in the plugin 'org.apache.maven.plugins:maven-jar-plugin:2.3.1'. A required class is missing: org/codehaus/plexus/components/io/resources/PlexusIoResourceCollection
[ERROR] -----------------------------------------------------
[ERROR] realm =    plugin>org.apache.maven.plugins:maven-jar-plugin:2.3.1
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/C:/maven/repository/org/apache/maven/plugins/maven-jar-plugin/2.3.1/maven-jar-plugin-2.3.1.jar
[ERROR] urls[1] = file:/C:/maven/repository/junit/junit/3.8.1/junit-3.8.1.jar
[ERROR] urls[2] = file:/C:/maven/repository/org/apache/maven/maven-archiver/2.4.1/maven-archiver-2.4.1.jar
[ERROR] urls[3] = file:/C:/maven/repository/org/codehaus/plexus/plexus-archiver/1.0/plexus-archiver-1.0.jar
[ERROR] urls[4] = file:/C:/maven/repository/commons-lang/commons-lang/2.1/commons-lang-2.1.jar
[ERROR] urls[5] = file:/C:/maven/repository/org/codehaus/plexus/plexus-utils/2.0.5/plexus-utils-2.0.5.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import  from realm ClassRealm[maven.api, parent: null]]
[ERROR] 
[ERROR] -----------------------------------------------------: org.codehaus.plexus.components.io.resources.PlexusIoResourceCollection
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException

这是我的pom.xml。我去掉了一些不必要的东西,但还是不行。

<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/maven-v4_0_0.xsd">

<modelVersion>4.0.0</modelVersion>
<groupId>sds.jetty.simple</groupId>
<artifactId>hello-world</artifactId>
<version>1.0</version>
<packaging>jar</packaging>
<name>Jetty HelloWorld</name>

<properties>
    <jettyVersion>8.1.2.v20120308</jettyVersion>
</properties>

<dependencies>
    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-server</artifactId>
        <version>${jettyVersion}</version>
    </dependency>
</dependencies>

<build>
</build>
</project>

解决方案:

尝试删除到文件夹

.m2\repository\org\apache\maven\plugins\maven-jar-plugin

您的文件系统上。你的插件jar可能已经损坏了。

如果这样不行,请尝试删除jetty-server文件夹(同样的原因)。

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