Build a Java app with Maven

Make sure you are signed in to your GitHub account. If you don’t yet have a GitHub account, sign up for free at GitHub.

Fork the simple-java-maven-app on GitHub into your local GitHub account. If you need help, refer to the GitHub documentation on forking a repo for more information.

Clone the forked simple-java-maven-app repository from GitHub to your machine. To begin this process, do either of the following, where <your-username> is the name of your user account on your operating system:

In Jenkins, sign in again if necessary, and select create new jobs under Welcome to Jenkins!. If your display is different, select New Item at the top left.

Enter your new Pipeline project name in Enter an item name.

Scroll down and select Pipeline, then select OK at the end of the page.

(Optional) Enter a Pipeline Description.

Select Pipeline on the left pane.

Select Definition, and then select the Pipeline script from SCM option. This option instructs Jenkins to obtain your Pipeline from source control management (SCM), which is your locally cloned Git repository.

Select Git from the options in SCM.

Enter the directory path of your locally cloned repository above in Script Path. This directory path from your user account/home directory on your host machine is mapped to the /home directory of the Jenkins container, according to your operating system, below:

Select Save to save your new Pipeline project. You’re now ready create a Jenkinsfile to check into your locally cloned Git repository.

Using your favorite text editor or IDE, create and save a new text file with the name Jenkinsfile at the root of your local simple-java-maven-app Git repository.

Copy the following Declarative Pipeline code and paste it into your empty Jenkinsfile:

pipeline {
    agent {
        docker {
            image 'maven:3.9.5-eclipse-temurin-17-alpine' (1)
            args '-v /root/.m2:/root/.m2' (2)
        }
    }
    stages {
        stage('Build') { (3)
            steps {
                sh 'mvn -B -DskipTests clean package' (4)
            }
        }
    }
}

Save your edited Jenkinsfile and commit it to your local simple-java-maven-app Git repository. Within the simple-java-maven-app directory, run the commands:

In Jenkins, sign in if necessary, and select Open Blue Ocean on the left pane.

Select Run from the This job has not been run options, then quickly select OPEN on the lower-right. If you cannot select OPEN in time, you can alternatively select the top row on the main Blue Ocean interface to display Jenkins running your project. You may need to wait several minutes for this first run to complete. After making a clone of your local simple-java-maven-app Git repository itself, Jenkins:

Select the X at the top-right to return to the main Blue Ocean interface.

Go back to your text editor/IDE and ensure your Jenkinsfile is open.

Copy and paste the following Declarative Pipeline syntax immediately under the Build stage of your Jenkinsfile:

        stage('Test') {
            steps {
                sh 'mvn test'
            }
            post {
                always {
                    junit 'target/surefire-reports/*.xml'
                }
            }
        }

pipeline {
    agent {
        docker {
            image 'maven:3.9.5-eclipse-temurin-17-alpine'
            args '-v /root/.m2:/root/.m2'
        }
    }
    stages {
        stage('Build') {
            steps {
                sh 'mvn -B -DskipTests clean package'
            }
        }
        stage('Test') { (1)
            steps {
                sh 'mvn test' (2)
            }
            post {
                always {
                    junit 'target/surefire-reports/*.xml' (3)
                }
            }
        }
    }
}

Save your edited Jenkinsfile and commit it to your local simple-java-maven-app Git repository. Within the simple-java-maven-app directory, run the commands:

In Jenkins, sign in if necessary, and access the Blue Ocean interface.

Select Run at the top left, then quickly select OPEN, which appears briefly at the lower-right, to display Jenkins running your updated Pipeline project. Alternatively, you can select the top row on the Blue Ocean interface to display Jenkins running your updated Pipeline project.

Go back to your text editor/IDE and ensure your Jenkinsfile is open.

Copy and paste the following Declarative Pipeline syntax immediately under the Test stage of your Jenkinsfile:

        stage('Deliver') {
            steps {
                sh './jenkins/scripts/deliver.sh'
            }
        }

pipeline {
    agent {
        docker {
            image 'maven:3.9.5-eclipse-temurin-17-alpine'
            args '-v /root/.m2:/root/.m2'
        }
    }
    options {
        skipStagesAfterUnstable()
    }
    stages {
        stage('Build') {
            steps {
                sh 'mvn -B -DskipTests clean package'
            }
        }
        stage('Test') {
            steps {
                sh 'mvn test'
            }
            post {
                always {
                    junit 'target/surefire-reports/*.xml'
                }
            }
        }
        stage('Deliver') { (1)
            steps {
                sh './jenkins/scripts/deliver.sh' (2)
            }
        }
    }
}

Save your updated Jenkinsfile and commit it to your local simple-java-maven-app Git repository.

In Jenkins, sign in if necessary, and access Jenkins' Blue Ocean interface.

Select Run at the top left, then quickly select OPEN, which appears briefly at the lower-right, to display Jenkins running your updated Pipeline project. Alternatively, you can select the top row on the Blue Ocean interface to display Jenkins running your updated Pipeline project. The Blue Ocean interface displays as below if a Pipeline runs successfully. Notice the additional "Deliver" stage. Select the previous "Test" and "Build" stage circles to access the outputs from those stages.

Select the X at the top-right to return to the main Blue Ocean interface, which lists your previous Pipeline runs in reverse chronological order.