Jenkinsfile to build a Java Maven Project

Create a Jenkinsfile named 02-Jenkinsfile-maven-build inside cicd folder

pipeline {
  agent any
  stages {
    stage ('Build') {
      steps {
        sh 'mvn clean package'
      }
    }
  }
}

In this Jenkinsfile, you have a single stage named Build and you have a mvn clean package inside the sh step

Push a 02-Jenkinsfile-maven-build file to the GitHub repository

Create the Pipeline named 02-hello-world-maven referring to your GitHub repository and enter Script Path as cicd/02-Jenkinsfile-maven-build

Build the pipeline and check the Console Output

First cicd/02-Jenkinsfile-maven-build is obtained from the GitHub repository

Then the mvn clean package command is executed

Finally, Jenkins creates a hello-world-1.0-SNAPSHOT.war file in the /var/lib/jenkins/workspace/02-hello-world-maven/target folder.