How to Create a Self-Contained JAR File with Maven and its Dependencies?

Creating a Jar File with Maven and Dependencies

When constructing a project that generates a standalone jar file, the inclusion of external dependencies is crucial. Yet, Maven doesn't readily provide this functionality, leaving developers searching for solutions.

Fortunately, the maven-assembly plugin offers an elegant solution with its "jar-with-dependencies" descriptor. This extension empowers developers to package dependencies along with the project's classes within a single jar file. To achieve this:

<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>

By incorporating this configuration, Maven generates a comprehensive jar file that encapsulates both the project's code and its required dependencies, making deployment and distribution seamless.

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