If uploading on the windows command line:

You need to set it in the global setting.xml file:
 

setting The configuration is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
  
  <localRepository>C:\Development\Library\Maven\repository\XHealthSystem-Dev</localRepository>
  
  <pluginGroups></pluginGroups>

  <proxies></proxies>

  <servers>
    <server>
      <!-- id You can write at will,，Corresponding to the id -->
      <id>maven-public</id>
      <!-- Login with user name and password -->
      <username>admin</username>
      <password>huanqiu888</password>
    </server>

    <server>
      <id>maven-snapshots</id>
      <username>admin</username>
      <password>huanqiu888</password>
    </server>
  </servers>


  <!--Requested download address,It's usually a central warehouse.-->
  <mirrors>
	  <mirror>
	    <id>mirrorId</id>
	      <name>nexus</name>
	      <url>http://47.166.191.218:8081/repository/maven-public/</url>
	      <mirrorOf>*</mirrorOf>
	      <!--Requested download address,It's usually a central warehouse.*All requests go private-->
	  </mirror>
  </mirrors>
  <!--Requested download address,It's usually a central warehouse.-->
  <profiles>
    <profile>
      <id>nexus</id>
      <repositories>
        <repository>
          <id>nexus</id>
          <name>Nexus</name>
          <url>http://47.166.191.218:8081/repository/maven-releases/</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </repository>
      </repositories>
      <pluginRepositories>
        <pluginRepository>
          <id>nexus</id>
          <name>Nexus</name>
          <url>http://47.166.191.218:8081/repository/maven-snapshots/</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </pluginRepository>
      </pluginRepositories>
    </profile>
  </profiles>




  <activeProfiles>
    <activeProfile>nexus</activeProfile>
  </activeProfiles>
</settings>

Project code:

<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">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.jesse.test</groupId>
  <artifactId>project-c</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
  
     
     <!-- End of setting private server warehouse -->
     
     <!-- Test whether to download on Alibaba cloud or start downloading on private server -->
     <dependencies>
     	<dependency>
		  <groupId>antlr</groupId>
		  <artifactId>antlr</artifactId>
		  <version>2.7.7</version>
		</dependency>
     </dependencies>
     
     <!-- Test whether to download on Alibaba cloud or end downloading on private server -->
     <!-- Deploy remote management -->
     <distributionManagement>
           <!-- Release deployment -->
           <repository>
                <id>maven-public</id>   
                <!-- this ID Must and setting.xml Medium id equally -->
                <name>Proj Release Repository</name>
                <url>http://47.166.191.218:8081/repository/maven-releases</url>
                <!-- Actual internal warehouse address -->
           </repository>
           <!-- Snapshot version deployment -->
           <snapshotRepository>
                <id>maven-snapshots</id>
                <!-- this ID Must and setting.xml Medium id equally -->
                <name>Proj Release snapshot</name>
                <url>http://47.166.191.218:8081/repository/maven-snapshots</url>  
                <!-- Actual internal warehouse address -->
           </snapshotRepository>
     </distributionManagement>
     
</project>

====
1.project-c is the package name of jar. Before publishing, you can search whether it exists.
2.mvn install
3.mvn deploy deployment
4. Check whether there is a package name with. project-c as jar in the remote warehouse. If so, the deployment is successful.

Pit: if an error is encountered, check the setting.xml configuration file. If the sub configuration file is configured, it may go to the general configuration file.