Eclipse 构建项目报错：The project was not built due to "xxx(项目名称) dosen't exists"

不知道不小心改动项目的哪个文件，Eclipse构建项目报错： The project was not built due to "xxx(项目名称) dosen't exists"，Fix the problem ，then try refresh this project  and building it since it may be inconsist   如果出现这个错误，倒是不影响项目运

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