java compiler level does not match the version of the installed java project facet，compilerfacet

java compiler level does not match the version of the installed java project facet，compilerfacet

java compiler level does not match the version of the installed java project facet

Java编译器的与安装的Java项目版本匹配问题

解决方案：

右键项目“Properties”，在弹出的“Properties”窗口左侧，单击“Project Facets”，打开“Project Facets”页面，将java想的version选到对应的jdk版本即可