解决IDEA无法下载maven依赖的问题

<?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>
      <id>nexus</id>
      <name>internal nexus repository</name>
      <!-- <url>http://192.168.1.100:8081/nexus/content/groups/public/</url>-->
      <url>http://repo.maven.apache.org/maven2</url>
      <mirrorOf>central</mirrorOf>
    </mirror>
  </mirrors>

</settings>

<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://192.168.1.100:8081/nexus/content/groups/public/</url>-->
  <url>http://repo.maven.apache.org/maven2</url>
  <mirrorOf>central</mirrorOf>
 </mirror>

 </mirrors>