分兩步：
STEP 1：配置maven；
STEP 2：配置IDEA。區分預設配置和專案級配置。

STEP 1：maven中央庫配置

國內常用的maven庫主要是阿里雲maven庫、華為雲maven。

其中阿里雲maven庫配置如下：

配置檔案路徑為conf/settings.xml

<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.
     |
    
     
 
-->
        <!-- 阿里雲倉庫 -->
        <mirror>
            <id>alimaven</id>
            <mirrorOf>central</mirrorOf>
            <name>aliyun maven</name>
            <url>http://maven.aliyun.com/nexus/content/repositories/central/</url>
        </
 
mirror>
    
        <!-- 中央倉庫1 -->
        <mirror>
            <id>repo1</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://repo1.maven.org/maven2/</url>
        </
 
mirror>
    
        <!-- 中央倉庫2 -->
        <mirror>
            <id>repo2</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://repo2.maven.org/maven2/</url>
        </mirror>
         <mirror>
              <id>nexus-aliyun</id>
             <mirrorOf>*</mirrorOf>
             <name>Nexus aliyun</name>
             <url>http://maven.aliyun.com/nexus/content/groups/public</url>
        </mirror>
  </mirrors>

STEP 2：IDEA配置

開啟IDEA，按下Ctrl+Alt+S，進入配置選項介面