运行java jar - 没有主清单属性错误 [英] Run java jar - no main manifest attribute error

问题描述

我创建了简单的java程序（maven with pom），当我用CMD运行一些命令时，它应该在给定路径下创建一个文件...我做 mvn clean install
成功完成，
现在我想从命令行使用这个创建的jar，如下所示：

I’ve created simple java program (maven with pom ) which when I run some command with CMD it should created a file under given path... I do mvn clean install which finish successfully, Now I want to use this created jar from the command line like follwoing:

java -jar   "/Users/i012/IdeaProjects/myproj/target/test.rts-1.0-SNAPSHOT.jar" path2genfile2create 

哪个应该运行我的程序（这是我第一次尝试这样的......）

Which should run my program (this the first time that I try something like this…)

但我得到的错误是：

no main manifest attribute, in /Users/i012/IdeaProjects/myproj/target/test.rts-1.0-SNAPSHOT.jar

这里可能缺少什么？哪个清单属性？

What could be missing here ? which manifest attribute ?

错误不是来自我创建的课程 ......

我创建了一些META-INF / MANIFEST.MF没有帮助，但可能是错误的

i've created some META-INF/MANIFEST.MF not helping but maybe Its wrong

推荐答案

如果您正在使用Maven汇编插件，或者你的IDE工具是，你需要一个 mainClass 元素。这就是我使用的：

If you're using the Maven assembly plug-in, or your IDE tooling is, you need a mainClass element. This is what I use:

<plugin>
    <artifactId>maven-assembly-plugin</artifactId>
    <configuration>
      <archive>
        <manifest>
          <mainClass>com.foo.MyMainClass</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>

这篇关于运行java jar - 没有主清单属性错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！