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用maven构建可执行jar?

executable-jar build-process maven-2 eclipse java

117

RMorrisey · 技术社区 · 16 年前

我正在尝试使用maven为一个名为“logmanager”的小型家庭项目生成一个可执行jar,如下所示:

How can I create an executable JAR with dependencies using Maven?

我将这里显示的代码片段添加到pom.xml中,并运行mvn assembly:assembly。它在logmanager/target中生成两个jar文件:logmanager-0.1.0.jar和logmanager-0.1.0-jar-with-dependencies.jar。我双击第一个jar时出错:

Could not find the main class: com.gorkwobble.logmanager.LogManager. Program will exit.

双击jar-with-dependencies.jar时出现了一个稍微不同的错误:

Failed to load Main-Class manifest attribute from: C:\EclipseProjects\logmanager\target\logmanager-0.1.0-jar-with-dependencies.jar

pom.xml ,供参考:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.gorkwobble</groupId>
  <artifactId>logmanager</artifactId>
  <name>LogManager</name>
  <version>0.1.0</version>
  <description>Systematically renames specified log files on a scheduled basis. Designed to help manage MUSHClient logging and prevent long, continuous log files.</description>
  <build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <version>2.2</version>
            <!-- nothing here -->
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>2.2-beta-4</version>
            <configuration>
              <descriptorRefs>
                <descriptorRef>jar-with-dependencies</descriptorRef>
              </descriptorRefs>
              <archive>
                <manifest>
                  <mainClass>com.gorkwobble.logmanager.LogManager</mainClass>
                </manifest>
              </archive>
            </configuration>
            <executions>
              <execution>
                <phase>package</phase>
                <goals>
                  <goal>single</goal>
                </goals>
              </execution>
            </executions>
          </plugin>
          <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
              <source>1.6</source>
              <target>1.6</target>
            </configuration>
          </plugin>
    </plugins>
  </build>
  <dependencies>
    <!-- commons-lang -->
    <dependency>
        <groupId>commons-lang</groupId>
        <artifactId>commons-lang</artifactId>
        <version>2.4</version>
    </dependency> 

    <!-- Quartz scheduler -->
    <dependency>
        <groupId>opensymphony</groupId>
        <artifactId>quartz</artifactId>
        <version>1.6.3</version>
    </dependency>
    <!-- Quartz 1.6.0 depends on commons collections -->
    <dependency>
      <groupId>commons-collections</groupId>
      <artifactId>commons-collections</artifactId>
      <version>3.1</version>
    </dependency>
    <!-- Quartz 1.6.0 depends on commons logging -->
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.1</version>
    </dependency>
    <!-- Quartz 1.6.0 requires JTA in non J2EE environments -->
    <dependency>
      <groupId>javax.transaction</groupId>
      <artifactId>jta</artifactId>
      <version>1.1</version>
      <scope>runtime</scope>
    </dependency>

    <!-- junitx test assertions -->
    <dependency>
        <groupId>junit-addons</groupId>
        <artifactId>junit-addons</artifactId>
        <version>1.4</version>
        <scope>test</scope>
    </dependency>

    <!-- junit dependency; FIXME: make this a separate POM -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.1</version>
    </dependency>

  </dependencies>
  <dependencyManagement>
  </dependencyManagement>
</project>

4 回复 | 直到 8 年前

1

247

Community Mohan Dere 6 年前

事实上,我认为 question 你提到的只是 更新-20101106: 有人修好了, 答案是指 version preceding the edit

它在logmanager/target中生成两个jar文件:logmanager-0.1.0.jar和logmanager-0.1.0-jar-with-dependencies.jar。

package 逐步 jar:jar (因为模块的包装类型为 jar assembly:assembly 并且应该包含来自当前模块及其依赖项的类(如果使用描述符 jar-with-dependencies

Could not find the main class: com.gorkwobble.logmanager.LogManager. Program will exit.

如果您应用了作为引用发布的链接的建议配置,那么您将jar插件配置为生成一个可执行工件,如下所示:

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <configuration>
      <archive>
        <manifest>
          <addClasspath>true</addClasspath>
          <mainClass>com.gorkwobble.logmanager.LogManager</mainClass>
        </manifest>
      </archive>
    </configuration>
  </plugin>

所以 logmanager-0.1.0.jar 确实是可执行的,但是1。这不是您想要的(因为它没有所有依赖项)和2。它不包含 com.gorkwobble.logmanager.LogManager (这就是错误所说的,检查jar的内容)。

双击jar-with-dependencies.jar时出现了一个稍微不同的错误:
Failed to load Main-Class manifest attribute from: C:\EclipseProjects\logmanager\target\logmanager-0.1.0-jar-with-dependencies.jar

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-assembly-plugin</artifactId>
    <configuration>
      <descriptorRefs>
        <descriptorRef>jar-with-dependencies</descriptorRef>
      </descriptorRefs>
    </configuration>
  </plugin>

通过这种设置, logmanager-0.1.0-jar-with-dependencies.jar 和 META-INF/MANIFEST.MF 不包含 Main-Class 不可执行文件,这也不是您想要的。

因此,我的建议是删除 configuration 元素,并按如下方式配置maven assembly插件:

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <version>2.2</version>
    <!-- nothing here -->
  </plugin>
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-assembly-plugin</artifactId>
    <version>2.2-beta-4</version>
    <configuration>
      <descriptorRefs>
        <descriptorRef>jar-with-dependencies</descriptorRef>
      </descriptorRefs>
      <archive>
        <manifest>
          <mainClass>org.sample.App</mainClass>
        </manifest>
      </archive>
    </configuration>
    <executions>
      <execution>
        <phase>package</phase>
        <goals>
          <goal>single</goal>
        </goals>
      </execution>
    </executions>
  </plugin>

当然,更换 org.sample.App 使用要执行的类。一点奖金,我保证 assembly:single 到 包裹 这样你就不用跑了 组装:组装 mvn install 并且该组件将在标准构建期间生产。

mvn clean install . 然后,将cd放入 target 目录,然后重试:

java -jar logmanager-0.1.0-jar-with-dependencies.jar

文件及其相关部分 pom.xml (插件配置部分)。另外,请张贴以下结果:

java -cp logmanager-0.1.0-jar-with-dependencies.jar com.gorkwobble.logmanager.LogManager

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <configuration>
      <source>1.6</source>
      <target>1.6</target>
    </configuration>
  </plugin>

2

16

mike 10 年前

答案 帕斯卡Thivent 我也帮了忙。但是如果您在 <pluginManagement> mvn install .

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>jar</packaging>


    <build>
        <pluginManagement>
            <plugins>

                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.1</version>
                    <configuration>
                        <source>1.6</source>
                        <target>1.6</target>
                    </configuration>
                </plugin>

                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-assembly-plugin</artifactId>
                    <version>2.4</version>
                    <configuration>
                        <archive>
                            <manifest>
                                <mainClass>main.App</mainClass>
                            </manifest>
                        </archive>
                        <descriptorRefs>
                            <descriptorRef>jar-with-dependencies</descriptorRef>
                        </descriptorRefs>
                    </configuration>
                    <executions>
                        <execution>
                            <id>make-assembly</id>
                            <phase>package</phase>
                            <goals>
                                <goal>single</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>

            </plugins>

        </pluginManagement>

        <plugins> <!-- did NOT work without this  -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
            </plugin>
        </plugins>

    </build>


    <dependencies>
       <!--  dependencies commented out to shorten example -->
    </dependencies>

</project>

3

5

leonidv 15 年前

如果不希望在包上执行程序集目标,可以使用下一个命令:

mvn package assembly:single

在这里是关键字。

4

-1

dolly doll 10 年前