Building and testing Java with Ant

You can create a continuous integration (CI) workflow in GitHub Actions to build and test your Java project with Ant.

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Introduction

This guide shows you how to create a workflow that performs continuous integration (CI) for your Java project using the Ant build system. The workflow you create will allow you to see when commits to a pull request cause build or test failures against your default branch; this approach can help ensure that your code is always healthy. You can extend your CI workflow to upload artifacts from a workflow run.

GitHub-hosted runners have a tools cache with pre-installed software, which includes Java Development Kits (JDKs) and Ant. For a list of software and the pre-installed versions for JDK and Ant, see Using GitHub-hosted runners.

Prerequisites

You should be familiar with YAML and the syntax for GitHub Actions. For more information, see:

We recommend that you have a basic understanding of Java and the Ant framework. For more information, see the Apache Ant Manual.

Using an Ant workflow template

Para uma introdução rápida, adicione um modelo de fluxo de trabalho ao diretório .github/workflows do repositório.

GitHub provides a workflow template for Ant that should work for most Java with Ant projects. The subsequent sections of this guide give examples of how you can customize this workflow template.

  1. Em GitHub, acesse a página principal do repositório.

  2. No nome do repositório, clique em Ações.

    Captura de tela das guias do repositório "github/docs". A guia "Ações" está realçada com um contorno laranja.

  3. Se você já tiver um fluxo de trabalho no repositório, clique em Novo fluxo de trabalho.

  4. The "Choose a workflow" page shows a selection of recommended workflow templates. Search for "Java with Ant".

  5. On the "Java with Ant" workflow, click Configure.

  6. Edit the workflow as required. For example, change the Java version.

  7. Click Commit changes.

    The ant.yml workflow file is added to the .github/workflows directory of your repository.

Como especificar a versão e a arquitetura da JVM

O modelo de fluxo de trabalho configura o PATH para conter OpenJDK 8 para a plataforma x64. Se você quiser usar uma versão diferente do Java, ou escolher uma arquitetura diferente (x64 ou x86), você pode usar a ação setup-java para escolher um ambiente de execução Java diferente.

Por exemplo, para usar a versão 11 do JDK fornecida pelo Adoptium para a plataforma x64, você poderá usar a ação setup-java e configurar os parâmetros java-version, distribution e architecture para '11', 'temurin' e x64.

YAML
steps:
  - uses: actions/checkout@v4
  - name: Set up JDK 11 for x64
    uses: actions/setup-java@v4
    with:
      java-version: '11'
      distribution: 'temurin'
      architecture: x64

Para obter mais informações, confira a ação setup-java.

Building and testing your code

You can use the same commands that you use locally to build and test your code.

The workflow template will run the default target specified in your build.xml file. Your default target will commonly be set to build classes, run tests and package classes into their distributable format, for example, a JAR file.

If you use different commands to build your project, or you want to run a different target, you can specify those. For example, you may want to run the jar target that's configured in your build-ci.xml file.

YAML
steps:
  - uses: actions/checkout@v4
  - uses: actions/setup-java@v4
    with:
      java-version: '17'
      distribution: 'temurin'
  - name: Run the Ant jar target
    run: ant -noinput -buildfile build-ci.xml jar

Packaging workflow data as artifacts

After your build has succeeded and your tests have passed, you may want to upload the resulting Java packages as a build artifact. This will store the built packages as part of the workflow run, and allow you to download them. Artifacts can help you test and debug pull requests in your local environment before they're merged. For more information, see Storing and sharing data from a workflow.

Ant will usually create output files like JARs, EARs, or WARs in the build/jar directory. You can upload the contents of that directory using the upload-artifact action.

YAML
steps:
  - uses: actions/checkout@v4
  - uses: actions/setup-java@v4
    with:
      java-version: '17'
      distribution: 'temurin'

  - run: ant -noinput -buildfile build.xml
  - uses: actions/upload-artifact@v4
    with:
      name: Package
      path: build/jar