Example of a simple .gitlab-ci.yml

.gitlab-ci.yml

java:
stage: test
script:
- mvn verify
artifacts:
	when: always
	reports:
		junit:
		- target/surefire-reports/TEST-*.xml
		- target/failsafe-reports/TEST-*.xml

test-jdk11:
  stage: test
  image: maven:3.6.3-jdk-11
  script:
    - 'mvn $MAVEN_CLI_OPTS clean org.jacoco:jacoco-maven-plugin:prepare-agent test jacoco:report'
  artifacts:
    paths:
      - target/site/jacoco/jacoco.xml

coverage-jdk11:
  # Must be in a stage later than test-jdk11's stage.
  # The `visualize` stage does not exist by default.
  # Please define it first, or chose an existing stage like `deploy`.
  stage: visualize
  image: haynes/jacoco2cobertura:1.0.4
  script:
    # convert report from jacoco to cobertura
    - 'python /opt/cover2cover.py target/site/jacoco/jacoco.xml src/main/java > target/site/cobertura.xml'
    # read the <source></source> tag and prepend the path to every filename attribute
    - 'python /opt/source2filename.py target/site/cobertura.xml'
  needs: ["test-jdk11"]
  dependencies:
    - test-jdk11
  artifacts:
    reports:
      cobertura: target/site/cobertura.xml

sonarqube-check:
  image: maven:3.6.3-jdk-11
  variables:
    SONAR_USER_HOME: "${CI_PROJECT_DIR}/.sonar"  # Defines the location of the analysis task cache
    GIT_DEPTH: "0"  # Tells git to fetch all the branches of the project, required by the analysis task
  cache:
    key: "${CI_JOB_NAME}"
    paths:
      - .sonar/cache
  script:
    - mvn verify sonar:sonar -Dsonar.qualitygate.wait=true
  allow_failure: true
  only:
    - merge_requests
    - master
    - develop