每次拉一个像hadoop这种项目，maven中央仓库慢的整个世界都不好了，然而自从换了阿里云的仓库以后，步行改飞行了！！！爽！！！
在maven安装目录的conf下的setting.xml中配置

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                      http://maven.apache.org/xsd/settings-1.0.0.xsd">
  <localRepository/>
  <interactiveMode/>
  <usePluginRegistry/>
  <offline/>
  <pluginGroups/>
  <servers/>
  <mirrors>
    <mirror>
     <id>aliyunmaven</id>
     <mirrorOf>*</mirrorOf>
     <name>阿里云公共仓库</name>
     <url>https://maven.aliyun.com/repository/public</url>
    </mirror>
     <mirror>
     <id>aliyunmaven</id>
     <mirrorOf>*</mirrorOf>
     <name>阿里云谷歌仓库</name>
     <url>https://maven.aliyun.com/repository/google</url>
    </mirror>
    <mirror>
     <id>aliyunmaven</id>
     <mirrorOf>*</mirrorOf>
     <name>阿里云阿帕奇仓库</name>
     <url>https://maven.aliyun.com/repository/apache-snapshots</url>
    </mirror>
    <mirror>
     <id>aliyunmaven</id>
     <mirrorOf>*</mirrorOf>
     <name>阿里云spring仓库</name>
     <url>https://maven.aliyun.com/repository/spring</url>
    </mirror>
    <mirror>
     <id>aliyunmaven</id>
     <mirrorOf>*</mirrorOf>
     <name>阿里云spring插件仓库</name>
     <url>https://maven.aliyun.com/repository/spring-plugin</url>
    </mirror>
  </mirrors>
  <proxies/>
  <profiles/>
  <activeProfiles/>
</settings>