maven common notes

Switching the default source

1. Edit conf / settings.xml
2. Ali mirrors added nodes in the mirror address (if it has a plurality of first row)

<mirrors>
  <!-- 阿里云仓库 -->
  <mirror>
  <id>alimaven</id>
  <mirrorOf>central</mirrorOf>
  <name>aliyun maven</name>
  <url>http://maven.aliyun.com/nexus/content/repositories/central/</url>
</mirror>