Can't execute jar- file: “no main manifest attribute”

Then again, you can utilize an expert gathering plugin, as demonstrated in the underneath example:

<plugin>

    <artifactId>maven-assembly-plugin</artifactId>

    <executions>

      <execution>

        <phase>package</phase>

        <goals>

          <goal>single</goal>

        </goals>

      </execution>

    </executions>

    <configuration>

      <archive>

        <manifest>

          <addClasspath>true</addClasspath>

          <mainClass>com.package.MainClass</mainClass>

        </manifest>

      </archive>

      <descriptorRefs>

        <descriptorRef>jar-with-dependencies</descriptorRef>

      </descriptorRefs>

    </configuration>

  </plugin>

In this model, all the reliance containers as indicated in the segment will be automatically remembered for your single container. Note that container with conditions ought to be in a real sense put as, not to be supplanted with the container document names you need to incorporate.

4 years ago

That should have been java -jar app.jar instead of java -jar "app".

The -jar option only works if the JAR file is an executable JAR file, which means it must have a manifest file with a Main-Class attribute in it. See Packaging Programs in JAR Files to learn how to create an executable JAR.

If it's not an executable JAR, then you'll need to run the program with something like:

java -cp app.jar com.somepackage.SomeClass
where com.somepackage.SomeClass is the class that contains the main method to run the program. (What that class is depends on the program, it's impossible to tell from the information you've supplied).

4 years ago