How to have a final jar with the dependency inside that jar in the jar format?

Question

I need a configuration for Maven where all the libraries inside the project are in the final jar in the jar format... So i need to have jars inside the final jar. For that i can only use maven. I already tried without success with plugins like one-jar. Thanks

Answer 1

To make a fat jar that includes all you jar files, add the following code to your pom.xml. When you clean and build the project this will automatically make a fat jar file. You need to give your main class inside <mainClass> tag. That's it.

<project>
      <build>
          <plugins>
              <plugin>
                  <artifactId>maven-assembly-plugin</artifactId>
                  <configuration>
                      <archive>
                          <manifest>
                              <addClasspath>true</addClasspath>
                              <mainClass>your.main.class</mainClass>
                          </manifest>
                      </archive>
                      <descriptorRefs>
                          <descriptorRef>jar-with-dependencies</descriptorRef>
                      </descriptorRefs>
                  </configuration>
                  <executions>
                      <execution>
                          <id>final-jar-with-dependencies</id>
                          <phase>package</phase>
                          <goals>
                              <goal>single</goal>
                          </goals>
                      </execution>
                  </executions>
              </plugin>
          </plugins>
      </build>
    </project>

Answer 2

Not sure for nested jar because I haven't tried yet.

But I have created .jar file with all project dependencies(specified in pom file)

Try following mvn command in terminal...

mvn org.apache.maven.plugins:maven-assembly-plugin:2.6:assembly -DdescriptorId=jar-with-dependencies package