eclipse juno中的maven安装错误

Question

当我尝试在 eclipse juno 中安装 maven 时，出现此错误。
错误详情:

Multiple annotations found at this line:
    - Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (execution: default-compile, phase: 
     compile)
    - CoreException: Could not calculate build plan: Plugin org.apache.maven.plugins:maven-compiler-plugin:2.5.1 or one of its dependencies could not be resolved: 
     Failed to read artifact descriptor for org.apache.maven.plugins:maven-compiler-plugin:jar:2.5.1: ArtifactResolutionException: The repository system is offline but the 
     artifact org.apache.maven.plugins:maven-compiler-plugin:pom:2.5.1 is not available in the local repository.
    - Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:2.5.1:testCompile (execution: default-testCompile, 
     phase: test-compile)

如果知道正确答案，请帮助我。
谢谢

Answer 1

如果您使用代理，请务必在 maven 的 settings.xml 中定义它.我猜你正在使用外部 maven 安装，所以你可以在 MAVEN_HOME/conf 中找到这个文件.在此文件中搜索 <proxies> </proxies>标签并查看这些标签之间的示例，了解如何设置代理。
还要确保在 Eclipse ( Preferences > Maven > Installations ) 中选择外部 maven 安装。最后一步是将用户设置( Preferences > Maven > User Setting )配置为指向 settings.xml (全局和用户)。运行更新项目，错误应该消失。

请注意，如果您移动到没有代理的网络，您应该在 settings.xml 中注释掉定义的代理。或设置 <active>false</active> <proxy> 中的标签标签。