Maven多模块情况下只编译单个子模块

  4.0.0

  org.example
  Parent
  pom
  1.0-SNAPSHOT
  
    ../Son1
    ../Son2
  

  Parent
  http://www.example.com

  
    UTF-8
    1.8
    1.8
  

  
    
      
        junit
        junit
        4.11
      
    
  

  4.0.0


  org.example
  Son1
  1.0-SNAPSHOT

  Son1
  
  http://www.example.com

  
    UTF-8
    1.8
    1.8
  

  
    
      junit
      junit
      4.11
      test
    
  

  4.0.0

  org.example
  Son2
  1.0-SNAPSHOT

  Son2
  
  http://www.example.com

  
    UTF-8
    1.8
    1.8
  

  
    
      junit
      junit
      4.11
      test
    
    
      org.example
      Son1
      1.0-SNAPSHOT
    
  

分别编译这三个模块，会是下面的现象：

1.编译Parent，同时会编译Son1和Son2。

[INFO] Reactor Build Order:
[INFO] 
[INFO] Son1                                                               [jar]
[INFO] Son2                                                               [jar]
[INFO] Parent                                                             [pom]

2.编译Son1，则只会编译Son1。

[INFO] Building Son1 1.0-SNAPSHOT

3.编译Son2，如果先Son1先install，再编译Son2则成功。

如果不先install Son1，那么编译Son2的时候会因为找不到Son1失败。

[INFO] Building Son2 1.0-SNAPSHOT
[WARNING] The POM for org.example:Son1:jar:1.0-SNAPSHOT is missing, no dependency information available
[INFO] BUILD FAILURE

所以针对这种情况可以在Parent.pom层级下执行：

mvn clean install -pl ../Son2 -am 或者 mvn clean install -pl :Son2 -am 

[INFO] Reactor Build Order:
[INFO] 
[INFO] Son1                                                               [jar]
[INFO] Son2                                                               [jar]

-pl, --projects
        Build specified reactor projects instead of all projects
-am, --also-make
        If project list is specified, also build projects required by the list
        (Maven 将构建指定项目所依赖的所有项目（直接或间接）)

Ref：

java - Maven Modules + Building a Single Specific Module - Stack Overflowhttps://stackoverflow.com/questions/1114026/maven-modules-building-a-single-specific-moduleMaven Tips and Tricks: Advanced Reactor Optionshttps://blog.sonatype.com/2009/10/maven-tips-and-tricks-advanced-reactor-options/