maven配置阿里云仓库

找到apache-maven-3.3.9-bin的解压目录，在conf文件夹下存在一个settings.xml文件，打开这个文件，找到<mirrors>一行，修改为如下：

<mirrors>
    <!-- mirror
     | Specifies a repository mirror site to use instead of a given repository. The repository that
     | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
     | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
     |
    <mirror>
      <id>mirrorId</id>
      <mirrorOf>repositoryId</mirrorOf>
      <name>Human Readable Name for this Mirror.</name>
      <url>http://my.repository.com/repo/path</url>
    </mirror>
     -->
    <mirror>  
        <id>nexus-aliyun</id>  
        <mirrorOf>central</mirrorOf>    
        <name>Nexus aliyun</name>  
        <url>http://maven.aliyun.com/nexus/content/groups/public</url>  
    </mirror>
  </mirrors>