Maven - 无法执行JAR

Question

在构建了一个示例mvn项目之后,我添加了我的org.restlet依赖项和Java代码.

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

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

Answer 1

您需要使用以下命令在清单中设置主类 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>

取自这里.

编辑

如果要将生成的jar打包为依赖项,可以使用它

<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.