今天在导入maven工程中遇到一错误，An internal error occurred during: "Updating Maven Project". > Unsupported IClasspathEntry kind=4
解决办法：
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Right-click on your project, select Maven -> Disable Maven Nature.
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Open you terminal, go to your project folder and do “mvn eclipse:clean”
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Right click on your Project and select “Configure -> Convert into Maven Project”