将Maven项目导入Eclipse时出现错误

Question

将Maven项目导入Eclipse时出现错误

3

java.lang.NullPointerException
        at org.eclipse.m2e.jdt.internal.AbstractJavaProjectConfigurator.isContained(AbstractJavaProjectConfigurator.java:470)
        at org.eclipse.m2e.jdt.internal.AbstractJavaProjectConfigurator.isNonOverlappingResourceDescriptor(AbstractJavaProjectConfigurator.java:461)
        at org.eclipse.m2e.jdt.internal.AbstractJavaProjectConfigurator.addResourceDirs(AbstractJavaProjectConfigurator.java:422)
        at org.eclipse.m2e.jdt.internal.AbstractJavaProjectConfigurator.addProjectSourceFolders(AbstractJavaProjectConfigurator.java:299)
        at org.eclipse.m2e.jdt.internal.AbstractJavaProjectConfigurator.configure(AbstractJavaProjectConfigurator.java:122)
        at org.eclipse.m2e.core.project.configurator.AbstractLifecycleMapping.configure(AbstractLifecycleMapping.java:120)
        at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$3.call(ProjectConfigurationManager.java:501)
        at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$3.call(ProjectConfigurationManager.java:1)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
        at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:494)
        at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.configureNewMavenProjects(ProjectConfigurationManager.java:281)
        at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$1.call(ProjectConfigurationManager.java:168)
        at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$1.call(ProjectConfigurationManager.java:1)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
        at org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:1355)
        at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.importProjects(ProjectConfigurationManager.java:136)
        at org.eclipse.m2e.core.ui.internal.wizards.ImportMavenProjectsJob$1.doCreateMavenProjects(ImportMavenProjectsJob.java:68)
        at org.eclipse.m2e.core.ui.internal.wizards.AbstractCreateMavenProjectsOperation.run(AbstractCreateMavenProjectsOperation.java:62)
        at org.eclipse.m2e.core.ui.internal.wizards.ImportMavenProjectsJob.runInWorkspace(ImportMavenProjectsJob.java:77)
        at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

我尝试了mvn eclipse:eclipse命令，然后在Eclipse中导入（导入现有的maven项目），但仍然抛出NullPointerException异常。

谢谢。

- hdang

@TimBiegeleisen 这个问题与您提到的那个完全不同，您的完整堆栈跟踪在哪里？能否请您进一步澄清？ - hdang

2个回答

1

我在使用 Eclipse MARS/M2E 1.6.2/JDK 1.8u66 时遇到了这个问题。如果您不介意使用较旧的 M2E，降级到 M2E 1.5.2 可以解决此问题。

只需在安装软件时使用以下链接即可。 http://download.eclipse.org/technology/m2e/releases/1.5/1.5.2.20150413-2215

- Bill H.

或者从http://download.eclipse.org/technology/m2e/milestones/1.7/使用m2e 1.7。 - michaldo

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- chuckd · Accepted Answer

这似乎是m2e的一个bug。你的项目可能包含对外部资源的引用。在我的情况下，它是父级项目中的资源:

  <resource>
    <directory>..</directory>
    <includes>
      <include>LICENSE</include>
      <include>NOTICE</include>
    </includes>
  </resource>

将目录规范从“..”更改为“${project.parent.basedir}”后，我摆脱了异常。