解决

• 找见setting.xml进行修改，如果没有Open 'setting.xml’则进行创建create ‘setting.xml’。

1. 直接在idea中进行查找
   
2. 在自己下载的apache-maven-3.5.2中的config中找见打开
   

• 将下面的代码复制（覆盖）到该文件中

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

  </mirrors>
</settings>

• 如果导入依赖还是比较慢的话，重启idea

原因

我们可以直接使用idea自带有maven。但是当添加依赖的时候中央仓库位于国外，所以下载速度极慢，这时，我们需要将其更改为国内的镜像，比如阿里云的。