Packaging jar is invalid Aggregator project need pom as packaging

• In My project I have different modules.
• Each module have pom.xml in which packaging is a jar. 
• And each pom refer to common parent.

• In parent module there is also a pom.xml which includes all the modules.

  But when i tried to make the packaging in the pom.xml of parent module it shows the error that is "Packaging jar is invalid Aggregator project need pom as packaging".

  I want to make the executable jar of the application from maven so,what is the solution for this problem or is there is any other solution.

解決方法：

To make things short: if your parent-aggregator project don't contains source code (and it's a good practice), just add this to your parent pom.xml:

<packaging>pom</packaging>

If the parent project contains source code, I strongly suggest you to:

• move this code in a new module (let's call it commons)
• make commons a child module of your parent project
• add the commons module as a dependency of all other modules requiring it (maybe all of them)
• add <packaging>pom</packaging> in the parent pom.xml