maven创建可执行jar（Executable JAR）

使用maven创建可执行的jar。

插件：maven-shade-plugin，它可以让用户配置Main-Class的值，然后在打包的时候将值填入/META-INF/MANIFEST.MF文件。关于项目的依赖，它很聪明地将依赖JAR文件全部解压后，再将得到的.class文件连同当前项目的.class文件一起合并到最终的CLI包中，这样，在执行CLI JAR文件的时候，所有需要的类就都在Classpath中了。

maven-shade-plugin 插件的地址： http://maven.apache.org/plugins/maven-shade-plugin/

Executable JAR的例子： http://maven.apache.org/plugins/maven-shade-plugin/examples/executable-jar.html

例子的XML：

To create an executable uber JAR, one simply needs to set the main class that serves as the application entry point:

<project>
  ...
  <build>
    <!-- 指定最终package的jar的名称 -->
    <finalName>mysql-backup</finalName>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-shade-plugin</artifactId>
        <version>2.2</version>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>shade</goal>
            </goals>
            <configuration>
              <transformers>
                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                  <mainClass>org.sonatype.haven.HavenCli</mainClass>
                </transformer>
              </transformers>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
  ...
</project>

 

This snippet configures a special resource transformer which sets the Main-Class entry in the MANIFEST.MF of the shaded JAR. Other entries can be added to the MANIFEST.MF as well via key-value pairs in the <manifestEntries> section:

<project>
  ...
  <build>
    <!-- 指定最终package的jar的名称 -->
    <finalName>mysql-backup</finalName>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-shade-plugin</artifactId>
        <version>2.2</version>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>shade</goal>
            </goals>
            <configuration>
              <transformers>
                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                  <manifestEntries>
                    <Main-Class>org.sonatype.haven.ExodusCli</Main-Class>
                    <Build-Number>123</Build-Number>
                  </manifestEntries>
                </transformer>
              </transformers>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
  ...
</project>