Integrate in a java action. If you want to use objects in Mendix app, you have to map it to the domain model.
Put those jar files in your Userlib directory and import them in your custom java actions Enzo mentioned.
Not sure if i was clear before,
i know that i can integrate them in a Java action, my point it use them as Entities and displayed in the Moduler the same way when you create a new Entity. Thank you in advance.