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报错信息：
Description Resource Path Location Type
The project was not built due to "Could not read metadata for 'D:\软件\apache-tomcat-7.0.73\apache-tomcat-7.0.73\work\.metadata\.plugins\org.eclipse.core.resources\.projects\zhangling\.indexes\e4\properties.index'. Unexpected version: 0.". Fix the problem, then try refreshing this project and building it since it may be inconsistent zhangling Unknown Java Problem解决方案：
1、打开·报错的文件夹，把这个编译后项目名删除
2、tomcat上面删除项目，然后添加项目，重启tomcat以后就好了！