Maven - 无法执行JAR [英] Maven - Can't Execute JAR

问题描述

在构建一个示例mvn项目之后，我添加了 org.restlet 依赖项& Java代码。

After building a sample mvn project, I added my org.restlet dependencies & Java code.

然后，我通过 mvn install 成功构建了我的JAR。最后，我在尝试运行JAR时遇到了错误。

Then, I successfully built my JAR via mvn install. Finally, I ran into an error when trying to run the JAR.

vagrant$ java -jar target/my-app-1.0-SNAPSHOT.jar 
Failed to load Main-Class manifest attribute from
target/my-app-1.0-SNAPSHOT.jar

加载Main-Class清单属性

推荐答案

您需要使用 maven-jar-plugin

    <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <configuration>
            <archive>
                <manifest>
                    <mainClass>com.someclass.Main</mainClass>
                </manifest>
            </archive>
        </configuration>
    </plugin>

取自此处。

编辑

如果你想打包带有依赖关系的结果jar，你可以使用这个

If you want to package the resulting jar with dependencies you can use this

<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>
      <phase>package</phase>
      <goals>
        <goal>single</goal>
      </goals>
    </execution>
  </executions>
</plugin>

取自这里。

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