Java compiler level does not match the version of the installed Java project facet
问题: Java compiler level does not match the version of the installed Java project facet
java编译级别与项目编译级别不一致
这种情况经常出现在导入项目中,例如:被导入项目原来的编译级别是jdk 1.7 ,新的eclipse环境编译级别是jdk1.8
解决方法: