你有没有试过:

如果您有导入项目到eclipse 4，请删除它。 在maven consol中，运行:mvn eclipse:clean Eclipse 4: File -> Import -> Maven ->现有Maven项目

如果更新命令用于用于Clover代码覆盖的项目，也会抛出此错误。

在此情况下解决: 取消要更新的项目文件夹。 再次运行maven更新，然后使用工具进行代码覆盖。

从开普勒升级到卢娜对我来说很管用。

我刚刚为Java 1.8支持添加了一些组件。似乎它们不像我想的那样兼容，或者是我把它们混错了。这真的引起了很多问题。尝试更新系统时报告错误，因为它们无法满足某些依赖项。Maven升级不起作用。我尝试了很多东西。

因此，如果没有理由避免升级，只需将luna存储库添加到可用的软件站点(luna http://download.eclipse.org/releases/luna/)并“检查更新”。最好所有的组件都使用相同的版本，并且有一些不错的新功能。

这个问题(https://bugs.eclipse.org/394042)在m2e 1.5.0中得到修复，该版本可用于Eclipse Kepler和Luna:

http://download.eclipse.org/technology/m2e/releases/1.5

如果你也使用m2e-wtp，你还需要安装m2e-wtp 1.1.0:

http://download.eclipse.org/m2e-wtp/releases/luna/1.1

确保您正在运行的m2e(clipse)插件的版本至少为1.1.0 关闭maven项目-右键单击“关闭项目” 手动删除。classpath文件中所有带有kind="var"的classpathentry 开放项目

or

删除maven项目 手动清除.classpath 4再导入项目

有时，即使重新导入Maven项目也无法工作。在eclipse中正确地更新项目并不是一个确定的过程。 我发现的唯一100%安全的程序是:

Disable Maven Nature, run mvn eclipse:clean, restart, cross your fingers and Pray 3 times. If this won't work, delete the project, run mvn eclipse:clean, re-import refresh, pray and use the force. If this still doesn't work, restart Eclipse, or even better your computer. While waiting for the reboot, you can make a random donation to fix your Karma. Repeat step 2 and don't forget to pray and control your anger. Anger leads to hate. Hate leads to suffering. Try all the other answers posted in this thread. You might need to try them all for 3 times at least before giving up. Format your Computer, re-install Eclipse and Maven. No need to pray anymore, all gods hate you anyway Delete your git project, burn the physical drive that stored the remote repository, and write your project from scratch. Find a time machine, travel to the past and convince yourself to follow another, non-programming career or at least to avoid Java