如何在eclipse中导入一个maven项目

> An internal error occurred during: "Updating Maven Project".> Unsupported IClasspathEntry kind=4

此时可以用如下方法解决：
Right-click on your project, select Maven -> Remove Maven Nature.
Open you terminal, go to your project folder and do “mvn eclipse:clean”
Right click on your Project and select “Configure -> Convert into Maven Project”