How Can I Use the Maven Assembly Plugin to Create a Single JAR with Dependencies?

Maven jar-with-dependencies Plugin for Consolidating Dependencies

Maven provides a powerful feature to combine all project dependencies into a single jar file, offering convenience and enhanced portability.

Unpacking Dependencies into a Single Jar

The maven-assembly plugin plays a crucial role in this process. By utilizing the "jar-with-dependencies" descriptor, you can unpack the classes from dependency jars and bundle them into your main jar.

Configuring the Assembly Plugin

To leverage this functionality, include the maven-assembly-plugin in your pom.xml with the necessary configuration:

  <build>
    <plugins>
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>single</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
      </plugin>
    </plugins>
  </build>

The "jar-with-dependencies" descriptor ensures that the resulting single jar contains all the necessary class files, making your application self-contained and easy to deploy.

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