Redundant parameter in Spring controller method?

问题

I have createForm, which is displayed to user. As you can presume it is empty form and the user has to fill it with information. In my controller I have, the following code:

     @RequestMapping(value = {"", "/"}, method = RequestMethod.GET, params = "mode=create")
     public ModelAndView showCreatePage(@Nonnull @ModelAttribute("createForm") ApplicationCreateForm form)
                throws ClientException {
            return customMethod("ApplicationController/create");
        }

We do not need to populate the form with the information to be present to the user all fields are empty, so why I need to specify in the metod ApplicationCreateForm form as method parameter? Is it unnecessary, or Spring use in some way?

来源：https://stackoverflow.com/questions/29031282/redundant-parameter-in-spring-controller-method