Eclipse：Maven项目构建器在构建工作空间时生成NullPointerException

Question

我正在使用STS，其中包含以下版本信息

Spring Tool Suite 
Version: 3.7.0.RELEASE
Build Id: 201506290652
Platform: Eclipse Mars (4.5.0)

我已经导入了许多Maven项目。当Eclipse自动构建我的工作区时，将弹出该对话框

Errors occurred during the build.
Errors running builder 'Maven Project Builder' on project 'myproject'.
java.lang.NullPointerException

当我查看我的workspace / .metadata / .log文件时，我看到了

!ENTRY org.eclipse.core.resources 4 75 2015-07-28 08:40:07.418
!MESSAGE Errors occurred during the build.
!SUBENTRY 1 org.eclipse.m2e.core 4 75 2015-07-28 08:40:07.418
!MESSAGE Errors running builder 'Maven Project Builder' on project 'ebook'.
!STACK 0
java.lang.NullPointerException
        at org.eclipse.wst.common.componentcore.internal.resources.VirtualComponent.setReferences(VirtualComponent.java:501)
        at org.eclipse.m2e.wtp.WebProjectConfiguratorDelegate.setModuleDependencies(WebProjectConfiguratorDelegate.java:282)
        at org.eclipse.m2e.wtp.WTPProjectConfigurator.mavenProjectChanged(WTPProjectConfigurator.java:96)
        at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.mavenProjectChanged(ProjectConfigurationManager.java:1000)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.notifyProjectChangeListeners(ProjectRegistryManager.java:783)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.applyMutableProjectRegistry(ProjectRegistryManager.java:919)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:299)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.getProjectFacade(MavenBuilder.java:154)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1.call(MavenBuilder.java:89)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:86)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:200)
        at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:205)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:245)
        at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:300)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:303)
        at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:359)
        at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:382)
        at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:144)
        at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:235)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

我不知道这意味着什么或如何解决它。感谢帮助， - 戴夫

Answer 1

删除.settings文件夹并重新导入Maven项目解决了我的问题。

Answer 2

转到“概述”，向下滚动选择“ projectxlmns”，滚动至“父org.springframework.boot”。

然后

• 从存储库中选择查找父项
• 右键单击
• 选择行家
• 更新项目

这解决了我在sts中遇到的问题