Identifying and Removing Unused Dependencies in pom.xml

When working with Maven projects, it’s important to keep your pom.xml file clean and efficient. Unused dependencies can slow down your builds, especially if you are using Docker, as it downloads all dependencies every time. Here's how you can identify and remove unused dependencies from your pom.xml.

Steps to Identify Unused Dependencies
Add the Maven Dependency Plugin to your pom.xml: Ensure that the Maven Dependency Plugin is included in your build plugins section.

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>3.1.2</version>
            <executions>
                <execution>
                    <goals>
                        <goal>analyze</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

Run the Dependency Analysis: Execute the following Maven command to analyze your project and identify unused dependencies.

mvn dependency:analyze

Review the Output: The output will show you a list of dependencies that are declared in your pom.xml but are not used in your project. It will also show you dependencies that are used but not declared.

Warning: The plugin only detects statically linked dependencies and may incorrectly show dynamically linked dependencies as unused.