解决：Cannot resolve plugin :maven-compiler-plugin:3.1问题

<mirror> <id>alimaven</id> <name>aliyun maven</name> <url>/nexus/content/repositories/central/</url> <mirrorOf>central</mirrorOf> </mirror> <mirror> <id>junit</id> <name>junit Address/</name> <url>/</url> <mirrorOf>central</mirrorOf> </mirror> <mirror> <id>alimaven</id> <name>aliyun maven</name> <url>/maven2</url> <mirrorOf>central</mirrorOf> </mirror>