How can you automate the generation of project documentation using Maven?

Maven can automate project documentation generation using the Maven Site Plugin, which aggregates project metadata, Javadoc, test reports, and other configured reports into a single static website. This keeps documentation current without manual authoring.

Key Points: • The maven-site-plugin generates a documentation site from pom.xml metadata and any configured <reporting> plugins. • Common additions include the Javadoc plugin (API docs) and the Surefire report plugin (test result summaries). • Running mvn site builds the full documentation site into target/site, ready to publish. • The site can be deployed automatically with mvn site-deploy to a configured location, such as an internal wiki or web server. • Because it's generated from the build itself, the documentation stays in sync with the current code and test state rather than going stale.

Example: Adding the Javadoc and Surefire Report plugins under <reporting> in pom.xml means every mvn site run produces an up-to-date site with API documentation and the latest test pass/fail summary, without anyone manually updating a wiki page.

Code Example:

<reporting>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-javadoc-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-report-plugin</artifactId>
        </plugin>
    </plugins>
</reporting>

Interview Tip: A concise interview answer is:

"I use the Maven Site Plugin along with reporting plugins like Javadoc and Surefire Report configured in pom.xml, so a single mvn site command generates an up-to-date documentation website. Because it's generated from the actual build, the docs never go stale the way a manually maintained wiki page does."