Maven 报错：Compilation of Maven projects is supported only if external build is started from an IDE.

1. Maven 报错：
   Error:Maven Resources Compiler: Maven project configuration required for module 'yourProjectName' isn't available. Compilation of Maven projects is supported only if external build is started from an IDE.
   原因：修改了项目对应的 文件夹名和 module 名。
   解决：
   如果是 idea 的话，右击 pom.xml 文件，选择最下面的 “ Add as maven build file”，然后编译器会重新构建，就好了