<build>

        <plugins>

            <plugin>

                <artifactId>maven-compiler-plugin</artifactId>

                <configuration>

                    <source>1.7</source>

                    <target>1.7</target>

                    <encoding>${project.build.sourceEncoding}</encoding>

                </configuration>

            </plugin>

            <plugin>

               <artifactId>maven-assembly-plugin</artifactId>

                <configuration>

                  <descriptorRefs>

                    <descriptorRef>jar-with-dependencies</descriptorRef>

                  </descriptorRefs>

                  <archive>

                        <manifest>

                            <mainClass>com.test.Helloworld</mainClass>

                        </manifest>

                   </archive>

                </configuration>

                <executions>

                  <execution>

                    <id>make-assembly</id> <!-- this is used for inheritance merges -->

                    <phase>package</phase> <!-- bind to the packaging phase -->

                    <goals>

                      <goal>single</goal>

                    </goals>

                  </execution>

                </executions>

            </plugin>

        </plugins>

    </build>