如何在intelliji 14.1.4中构建可运行的jar文件

my-project/
├── src/
│   ├── main/
│   │   ├── java/
│   │   │   └── com/
│   │   │       └── example/
│   │   │           └── Main.java
│   │   └── resources/
│   └── test/
│       └── java/
│           └── com/
│               └── example/
│                   └── MainTest.java
├── pom.xml (for Maven projects)
└── build.gradle (for Gradle projects)

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <version>3.2.0</version>
            <configuration>
                <archive>
                    <manifest>
                        <mainClass>com.example.Main</mainClass>
                    </manifest>
                </archive>
            </configuration>
        </plugin>
    </plugins>
</build>

mvn clean package

jar {
    manifest {
        attributes 'Main-Class': 'com.example.Main'
    }
}

gradle clean build