报错信息：
Error:Maven Resources Compiler: Maven project configuration required for module 'user-web' isn't available.
Compilation of Maven projects is supported only if external build is started from an IDE.
解决办法：
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