MAVEN包默认地址设置
<mirror>
<id>alimaven</id>
<name>aliyun maven</name>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<mirrorOf>central</mirrorOf>
</mirror>
MAVEN阿里云镜像地址
MAVEN库地址
http://search.maven.org/#search%7Cga%7C1%7CSpring