Problems easily ignored by POM

1. distributionManagement： Configuration Management Used for packing
   mvn install The project generated artifacts will be installed locally Maven Warehouse ,
   mvn deploy Used to distribute project generated artifacts to remote Maven Warehouse .
   Local Maven The components of the warehouse can only be used by the current user , On distribution to remote Maven After the warehouse , All users who have access to the repository can use your component .
   We need to configure POM Of distributionManagement To specify the Maven The location of the distribution component , as follows ：

   <project>    
     ...    
     <distributionManagement>    
       <repository>    
         <id>nexus-releases</id>    
         <name>Nexus Release Repository</name>    
         <url>http://127.0.0.1:8080/nexus/content/repositories/releases/</url>    
       </repository> 
       <!--  Mirror warehouse  -->   
       <snapshotRepository>    
         <id>nexus-snapshots</id>    
         <name>Nexus Snapshot Repository</name>    
         <url>http://127.0.0.1:8080/nexus/content/repositories/snapshots/</url>    
       </snapshotRepository>    
     </distributionManagement>    
     ...    
   </project>    
   

2. dependencyManagement： management Maven rely on
   General parent module configuration , Sub modules import dependencies through inheritance or insertion .
   Please refer to this article Dependency management

3. Basic configuration

   <project xmlns = "http://maven.apache.org/POM/4.0.0" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    
       <!--  Model version  -->
       <modelVersion>4.0.0</modelVersion>
       <!--  The sole mark of a company or organization , And the path generated during configuration is also generated from this ,  Such as com.companyname.project-group,maven It's going to be a project jar Package local path ：/com/companyname/project-group -->
       <groupId>com.companyname.project-group</groupId>
    
       <!--  The only one in the project ID, One groupId There may be more than one project , Rely on artifactId Distinguishable  -->
       <artifactId>project</artifactId>
    
       <!--  Version number  -->
       <version>1.0</version>
   </project>
   

 See this article for details  [Maven POM](https://www.runoob.com/maven/maven-pom.html)