Type Java compiler level does not match the version of the installed Java project facet.项目内容没错但是项目上报...

1、Window->Show View->Problems 2、在项目上右键properties->project Facets->修改右侧的version  保持一致 3、window->preferences->Java->Compiler->设置右侧的Compiler compliance level 4、window->preferences->java->Installed JREs->

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