I'm working with WebLogic on a daily basis, and have some experience with WebSphere. Both of those support autodeployment, but only in development mode. In a testing Weblogic environment, you don't even have to shutdown the server - the application placed in the directory will be recognized and deployed automatically. Both Oracle and IBM discourage the use of this features and make them unavailable in production mode.

I had to check how JBoss deals with this concept. It seems that they are calling the feature "hot deployment" and, as far as I have read, they allow it in production environment. Strange practice. But they too have a command line interface that could be helpful to you.