Installing Maven

Maven is an open source Java project of Apache. It is a project management tool that can be used to build and manage Java projects.
You are not advised to run the ./mvnw clean install command to build the project because even if Maven has been installed, a Maven version will be automatically downloaded after you run this command. To download a specified Maven version, for example, apache-maven-3.5.0-bin.zip:
```
grep -nr https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.5.0/apache-maven-3.5.0-bin.zip
vi .mvn/wrapper/maven-wrapper.properties
```
You are advised to run the mvn clean install command to build a project using the installed Maven version. You can also run the mvn clean install -DskipTests=true command to skip test cases and directly build a project.

Download the Maven installation package.

Download address: https://archive.apache.org/dist/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz
Copy it to the /home directory on the server.

If the server is connected to the Internet, you can run the wget command to download the installation package.

          
               cd /home
wget https://archive.apache.org/dist/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz --no-check-certificate

Decompress the installation package.

       
            tar -zxvf apache-maven-3.6.3-bin.tar.gz

Install Maven in the specified directory, for example, /opt/.
1

mv apache-maven-3.6.3 /opt/
Configure the Maven environment variables.
1. Open the profile file.
```
vim /etc/profile
```
2. Add the content of the corresponding system to the file.
```
export MAVEN_HOME=/opt/apache-maven-3.6.3
export PATH=$MAVEN_HOME/bin:$PATH
```
3. Press Esc, type :wq!, and press Enter to save the file and exit.
4. Make the environment variables take effect.
  1
  
  source /etc/profile
5. View the environment variables.
```
echo $MAVEN_HOME
echo $PATH
```
View the Maven version.
1

mvn -v

Modify the Maven configuration file.

Open the configuration file.

vim /opt/apache-maven-3.6.3/conf/settings.xml

Configure the local repository.
The default address of the local repository is ${user.home}/.m2/repository. If you log in as the root user, the local repository path is /root/.m2/repository.

Configure the remote HUAWEI CLOUD (find <mirrors> and <profiles> and add the corresponding content):

<mirrors>
         <mirror>
                <id>huaweicloud</id>
                <mirrorOf>*</mirrorOf>
                <url>https://mirrors.huaweicloud.com/repository/maven/</url>
         </mirror>
</mirrors>
<profiles>
       <profile>   
         <id>repoId1</id>    
         <activation>     
         <activeByDefault>true</activeByDefault>   
         </activation>    
         <repositories>        
         <repository>       
          <id>huaweimaven</id>        
          <name>huaweimaven</name>        
          <url>https://mirrors.huaweicloud.com/kunpeng/maven</url>        
          <releases>        
               <enabled>true</enabled>     
          </releases>        
          <snapshots>        
               <enabled>false</enabled>      
          </snapshots>     
         </repository>   
         </repositories> 
       </profile>
</profiles>

Configuring a network proxy.

If a proxy is used to access the Internet, you need to configure the network proxy (set host, port, username, and password based on your requirements):

<proxies>
   <proxy>
     <id>my-proxy</id>
     <active>true</active>
     <protocol>https</protocol>
     <host>xxx</host>
     <port>xxx</port>
     <username>xxx</username>
     <password>xxx</password>
     <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
   </proxy>
   <proxy>
     <id>my-proxy1</id>
     <active>true</active>
     <protocol>http</protocol>
     <host>xxx</host>
     <port>xxx</port>
     <username>xxx</username>
     <password>xxx</password>
     <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
   </proxy>
</proxies>

Press Esc, type :wq!, and press Enter to save the file and exit.

Parent topic: Configuring the Compilation Environment