我想将我的项目打包在一个可执行的JAR中进行分发。

如何使Maven项目将所有依赖JAR打包到输出JAR中?


当前回答

要从命令行本身创建可执行JAR,只需从项目路径运行以下命令:

mvn assembly:assembly

其他回答

我仔细阅读了这些响应中的每一个,希望创建一个包含所有依赖项的可执行JAR文件,但没有一个能正常工作。答案是shade插件,它非常简单明了。

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-shade-plugin</artifactId>
  <version>2.3</version>

  <executions>
    <!-- Run shade goal on package phase -->
    <execution>
      <phase>package</phase>
      <goals>
        <goal>shade</goal>
      </goals>

      <configuration>
        <transformers>
          <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
            <mainClass>path.to.MainClass</mainClass>
          </transformer>
        </transformers>
      </configuration>
    </execution>
  </executions>

</plugin>

请注意,您的依赖项需要有编译或运行时的范围才能正常工作。

这个例子来自mkyong.com

您可以使用依赖插件在包阶段之前在单独的目录中生成所有依赖项,然后将其包含在清单的类路径中:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-dependency-plugin</artifactId>
    <executions>
        <execution>
            <id>copy-dependencies</id>
            <phase>prepare-package</phase>
            <goals>
                <goal>copy-dependencies</goal>
            </goals>
            <configuration>
                <outputDirectory>${project.build.directory}/lib</outputDirectory>
                <overWriteReleases>false</overWriteReleases>
                <overWriteSnapshots>false</overWriteSnapshots>
                <overWriteIfNewer>true</overWriteIfNewer>
            </configuration>
        </execution>
    </executions>
</plugin>
<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <configuration>
        <archive>
            <manifest>
                <addClasspath>true</addClasspath>
                <classpathPrefix>lib/</classpathPrefix>
                <mainClass>theMainClass</mainClass>
            </manifest>
        </archive>
    </configuration>
</plugin>

或者,使用${project.build.directory}/classes/lib作为OutputDirectory将所有JAR文件集成到主JAR文件中,但随后需要添加自定义类加载代码来加载JAR文件。

您可以将以下内容添加到pom.xml文件中:

<build>
<defaultGoal>install</defaultGoal>
<plugins>
  <plugin>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>2.3.2</version>
    <configuration>
      <source>1.6</source>
      <target>1.6</target>
    </configuration>
  </plugin>
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <version>2.3.1</version>
    <configuration>
      <archive>
        <manifest>
          <addClasspath>true</addClasspath>
          <mainClass>com.mycompany.package.MainClass</mainClass>
        </manifest>
      </archive>
    </configuration>
  </plugin>
  <plugin>
    <artifactId>maven-assembly-plugin</artifactId>
    <configuration>
      <descriptorRefs>
        <descriptorRef>jar-with-dependencies</descriptorRef>
      </descriptorRefs>
      <archive>
        <manifest>
          <mainClass>com.mycompany.package.MainClass</mainClass>
        </manifest>
      </archive>
    </configuration>
    <executions>
      <execution>
        <id>make-my-jar-with-dependencies</id>
        <phase>package</phase>
        <goals>
          <goal>single</goal>
        </goals>
      </execution>
    </executions>
  </plugin>
</plugins>
</build>

然后,您必须通过控制台切换到pom.xml文件所在的目录。然后,您必须执行mvn assembly:single,然后希望构建具有依赖关系的可执行JAR文件。您可以在切换到带有cd的输出(目标)目录时检查它/目标并使用类似于java-jarmavenproject1-1.0-SNAPSHOT-JAR-with-dependencies.JAR的命令启动JAR。

我用Apache Maven 3.0.3测试了这一点。

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>2.4.1</version>
            <configuration>
                <!-- get all project dependencies -->
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
            </configuration>
            <executions>
                <execution>
                    <id>make-assembly</id>
                    <!-- bind to the packaging phase -->
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

要从命令行本身创建可执行JAR,只需从项目路径运行以下命令:

mvn assembly:assembly