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

Use:

mvn clean install -U dependency:copy-dependencies

jar文件将在名为“target”的文件夹中生成,该文件夹与“src”文件夹位于同一根目录中。

其他回答

在我看来,Ken Liu是对的。Maven依赖插件允许您扩展所有依赖项,然后可以将其视为资源。这允许您将它们包含在主工件中。使用汇编插件会创建一个很难修改的辅助工件——在我的例子中,我想添加自定义清单条目。我的POM文件最终为:

<project>
  ...
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-dependency-plugin</artifactId>
        <executions>
          <execution>
            <id>unpack-dependencies</id>
            <phase>package</phase>
            <goals>
              <goal>unpack-dependencies</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
    ...
    <resources>
      <resource>
        <directory>${basedir}/target/dependency</directory>
        <targetPath>/</targetPath>
      </resource>
    </resources>
  </build>
  ...
</project>
<build>
  <plugins>
    <plugin>
      <artifactId>maven-assembly-plugin</artifactId>
      <configuration>
        <archive>
          <manifest>
            <mainClass>fully.qualified.MainClass</mainClass>
          </manifest>
        </archive>
        <descriptorRefs>
          <descriptorRef>jar-with-dependencies</descriptorRef>
        </descriptorRefs>
      </configuration>
    </plugin>
  </plugins>
</build>

你用

mvn clean compile assembly:single

编译目标应在组装之前添加:单个或其他项目的代码不包含在内。

请在评论中查看更多详细信息。


通常,此目标与自动执行的构建阶段相关联。这确保在执行mvn安装或执行部署/发布时构建JAR。

<build>
  <plugins>
    <plugin>
      <artifactId>maven-assembly-plugin</artifactId>
      <configuration>
        <archive>
          <manifest>
            <mainClass>fully.qualified.MainClass</mainClass>
          </manifest>
        </archive>
        <descriptorRefs>
          <descriptorRef>jar-with-dependencies</descriptorRef>
        </descriptorRefs>
      </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>

您可以使用maven shade插件构建如下的über JAR文件:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-shade-plugin</artifactId>
    <executions>
        <execution>
            <phase>package</phase>
            <goals>
                <goal>shade</goal>
            </goals>
        </execution>
    </executions>
</plugin>

这是我找到的最好的方法:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-jar-plugin</artifactId>
  <version>2.4</version>
  <configuration>
    <archive>
      <manifest>
      <addClasspath>true</addClasspath>
      <mainClass>com.myDomain.etc.MainClassName</mainClass>
      <classpathPrefix>dependency-jars/</classpathPrefix>
      </manifest>
    </archive>
  </configuration>
</plugin>

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-dependency-plugin</artifactId>
  <version>2.5.1</version>
  <executions>
    <execution>
      <id>copy-dependencies</id>
      <phase>package</phase>
      <goals>
        <goal>copy-dependencies</goal>
      </goals>
      <configuration>
        <outputDirectory>
          ${project.build.directory}/dependency-jars/
        </outputDirectory>
      </configuration>
    </execution>
  </executions>
</plugin>

使用此配置,所有依赖项都将位于依赖项jar中。我的应用程序没有Main类,只有上下文类,但我的一个依赖项确实有一个Main类(com.myDomain.ec.MainClassName),它启动JMX服务器,并接收start或stop参数。因此,我可以这样启动我的应用程序:

java -jar ./lib/TestApp-1.0-SNAPSHOT.jar start

对我有用的是:

  <plugin>
    <artifactId>maven-dependency-plugin</artifactId>
    <executions>
      <execution>
        <id>unpack-dependencies</id>
        <phase>prepare-package</phase>
        <goals>
          <goal>unpack-dependencies</goal>
        </goals>
        <configuration>
          <outputDirectory>${project.build.directory}/classes</outputDirectory>
        </configuration>
      </execution>

    </executions>
  </plugin>

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <executions>
      <execution>
        <id>unpack-dependencies</id>
        <phase>package</phase>
      </execution>
    </executions>
    <configuration>
      <archive>
        <manifest>
          <addClasspath>true</addClasspath>
          <classpathPrefix>lib/</classpathPrefix>
          <mainClass>SimpleKeyLogger</mainClass>
        </manifest>
      </archive>
    </configuration>
  </plugin>

我有一个特殊的案例,因为我的依赖是系统一:

<dependency>
  ..
  <scope>system</scope>
  <systemPath>${project.basedir}/lib/myjar.jar</systemPath>
</dependency>

我已经更改了user189057提供的代码,并进行了更改:

maven依赖插件在“准备包”阶段执行我将解压缩的类直接提取到“目标/类”