'parent.relativePath' points at no local POM @ line 14, column 13

springboot项目多模块开发，在打包时候提示：

Non-resolvable parent POM for com.example:admin:2.0: Failure to find 

com.example:basic:pom:2.0 in http://maven.aliyun.com/nexus/content/groups/public was cached 

in the local repository, resolution will not be reattempted until the update interval of 

nexus-aliyun has elapsed or updates are forced and 'parent.relativePath' points at no local 

POM @ line 5, column 13
 

原因在于在pom中配置时，需指定.

相对路径的默认值是../pom.xml.

maven首先会在当前路径下寻找父项目pom.xml，其次会在relativePath下寻找，然后在本地仓库，最后在远程仓库中寻找。

我在代码里面是写的.所以报错就是上面的那样。把所有子模块的 去掉就OK了