How to handle the bind exception with @ExceptionHandler

My requirement is to perform the server side validation for the form using Spring 3.0 and Hibernate Validator.Remember that I am submitting the form using AJAX call.My Controller class code is like below. ``` public ModelAndView generatePdfReport(@ModelAttribute("reports") @Valid ReportsCommand model, BindingResult result, ModelAndView modelAndView, HttpServletRequest request, HttpServletResponse response) throws Exception { if (result.hasErrors()) { throw new BindException(result); } else{ ... } ``` update... ``` @ExceptionHandler(BindException.class) public @ResponseBody String handleException(BindException e,HttpServletRequest request, HttpServletResponse response) { response.setStatus(HttpServletResponse.SC_BAD_REQUEST); return e.getMessage(); } ``` This is the Handler Method I placed in the controller.I used the @ResponseBody annotation but still it is showing the response in html format not in JSON format... What is the wrong in my code.. And the below is the field I am validating ``` @Size(min = 2, max = 3, message = "calltype must between 2 to 3 Characters.") private String callType; ``` If I give size as more than three, it is entering into the if and throwing the exception.What I want is that, I want to handle this exception and return the json response.May be I can do this using @ExceptionHandler but don't know how.Or any other solution to resolve this problem also will be greatly appreciated.