eclipse默认的repo.maven.apache.org/maven2太慢-替换为aliyun源解决

eclipse操作步骤：

window=>左侧maven选项-User Settings，创建一个包含下面内容的xml文件，设置之，apply，重启IDE，感受吧！！！
<?xml version="1.0" encoding="UTF-8"?>
<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">
    <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>alimaven</id>
            <name>aliyun maven</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
            <mirrorOf>central</mirrorOf>
        </mirror>
 
        <mirror>
            <id>uk</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://uk.maven.org/maven2/</url>
        </mirror>
 
        <mirror>
            <id>CN</id>
            <name>OSChina Central</name>
            <url>http://maven.oschina.net/content/groups/public/</url>
            <mirrorOf>central</mirrorOf>
        </mirror>
 
        <mirror>
            <id>nexus</id>
            <name>internal nexus repository</name>
            <url>http://repo.maven.apache.org/maven2</url>
            <mirrorOf>central</mirrorOf>
        </mirror>
 
    </mirrors>
</settings>