 <repositories>
  <repository>
   <id>local-nexus</id>
   <url>http://xxx.xxx.xxx.135:8081/nexus/repository/maven-group-snapshots/</url>
   <releases>
    <enabled>true</enabled>
   </releases>
   <snapshots>
    <enabled>true</enabled>
   </snapshots>
  </repository>
  <repository>
   <id>ali-maven</id>
   <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
   <releases>
    <enabled>true</enabled>
   </releases>
   <snapshots>
    <enabled>true</enabled>
   </snapshots>
  </repository>
 </repositories>

setting.xml配置倉庫：

   <!-- 這里配置的阿里云的鏡像倉庫來替代maven中央倉庫 -->
  <mirrors>
    <mirror>  
      <id>alimaven</id>  
      <name>aliyun maven</name>  
      <url>http://maven.aliyun.com/nexus/content/groups/public/</url>  
      <mirrorOf>central</mirrorOf>          
    </mirror>
  </mirrors>

compile一下：

...
//優(yōu)先加載本地倉庫
[DEBUG] Using local repository at D:\programs\apache-maven-3.6.1-bin\notify_repo
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10.0 for D:\programs\apache-maven-3.6.1-bin\notify_repo
[INFO] Scanning for projects...
//這里使用setting.xml配置的阿里云中央倉庫代替maven中央倉庫
[DEBUG] Using mirror alimaven (http://maven.aliyun.com/nexus/content/groups/public/) for central (https://repo.maven.apache.org/maven2).

...

...

//可以看到這是遠(yuǎn)程倉庫加載的順序，先是加載pom.xml配置的135私服，然后是ali-maven，最后才是setting.xml中的alimavn,在pom.xml中，可以通過調(diào)整<repository>的順序來調(diào)整私服的加載順序
[DEBUG] Repositories (dependencies): 
[local-nexus (http://xxx.xxx.xxx.135:8081/nexus/repository/maven-group-snapshots/, default, releases+snapshots), 
ali-maven (http://maven.aliyun.com/nexus/content/groups/public/, default, releases+snapshots), 
alimaven (http://maven.aliyun.com/nexus/content/groups/public/, default, releases)]

...

這里說的、以及setting.xml中的并不能代表實際中出現(xiàn)的所有配置，具體加載順序還是得看具體的項目和maven配置，這些都不是重點，重點是可以通過日志來知道實際是什么情況的。

最后，如何在idea中開啟maven的debug級別日志：