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

这个是因为Facted Project中的Java版本设定与项目的Java版本设定不一致。

解决：查看Project属性，使Java Compiler和Project Facets显示的java版本号一致。