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Building Java Apps

Java applications often use build tools like Maven or Gradle. Jenkins can integrate with these tools to compile, test, and package your code.

Installing Maven/Gradle Plugins

Install the "Maven Integration" plugin (for Maven) or "Gradle" plugin. Then configure JDK and Maven/Gradle installations under "Manage Jenkins" → "Global Tool Configuration".

Building a Maven Project (Freestyle)

Create a freestyle job, set SCM to Git, then add a build step "Invoke top‑level Maven targets". Enter goals: clean compile test or package.

Maven in Declarative Pipeline

Use the sh step to run Maven, or the withMaven wrapper.
pipeline {
    agent any
    tools {
        maven 'Maven-3.9'
        jdk 'JDK-17'
    }
    stages {
        stage('Build') {
            steps {
                sh 'mvn clean compile'
            }
        }
        stage('Test') {
            steps {
                sh 'mvn test'
            }
        }
        stage('Package') {
            steps {
                sh 'mvn package'
                archiveArtifacts artifacts: 'target/*.jar'
            }
        }
    }
}

Using Gradle

Similarly, you can use the Gradle wrapper (gradlew) in your repository.
stage('Build') {
    steps {
        sh './gradlew build'
    }
}

Publishing Test Reports

Jenkins can parse JUnit‑style XML test reports. After running tests, use the junit step.
post {
    always {
        junit 'target/surefire-reports/*.xml'
    }
}


Two Minute Drill
  • Configure JDK and Maven/Gradle in Global Tool Configuration.
  • Use tools directive to select specific versions.
  • Archive artifacts with archiveArtifacts.
  • Publish JUnit test reports with junit.

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