修改idea使用本地maven配置

1.解决的问题

在idea中新创建了springboot项目，但pom中依赖的包总是无法导入。工作的网络不能直接访问外网，需要配置代理。
本地的maven已经做了配置，并把资料库改为了淘宝的。
需要把idea的默认maven改为本地maven。

2.本地maven配置

maven的安装和配置，不在赘述，见：
maven的配置文件：MAVEN_HOME\conf\settings.xml。关键内容如下：

  <!-- localRepository
   | The path to the local repository maven will use to store artifacts.
   |
   | Default: ${user.home}/.m2/repository
  <localRepository>/path/to/local/repo</localRepository>
  -->
<localRepository>D:\Maven\local-repo</localRepository>

<proxies>
    <!-- proxy
     | Specification for one proxy, to be used in connecting to the network.
     |
    <proxy>
      <id>optional</id>
      <active>true</active>
      <protocol>http</protocol>
      <username>proxyuser</username>
      <password>proxypass</password>
      <host>proxy.host.net</host>
      <port>80</port>
      <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
    </proxy>
    -->
    <proxy>
      <id>optional</id>
      <active>true</active>
      <protocol>http</protocol>
      <host>********</host>
      <port>80</port>
      <nonProxyHosts>*******.com.cn</nonProxyHosts>
    </proxy>
  </proxies>

<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>
      <!--This sends everything else to /public -->
      <id>nexus-aliyun</id>
      <mirrorOf>*</mirrorOf>
      <name>Nexus aliyun</name>
      <url>http://maven.aliyun.com/nexus/content/groups/public</url>
    </mirror>
  </mirrors>

3.设置idea的maven

Ctrl+Alt+s，【设置】，搜索maven：定位到【Build,Execution,Deployment】【Build Tools】【Maven】,【User setting file】，选定本地maven的配置文件。本地资料库会自动配置中的地址。

4.导入包检查效果

pom文件一修改，idea会自动提示是否导入，选择导入即可。
导入前【External Libraries】只有JDK的包，成功后，就有Maven自动导入的包了。