@ExceptionHandler with parameters not working

Question

I am trying to capture all exceptions of some class in my Controller class. It works fine when I define it like this:

@ExceptionHandler(NoSearchResultException.class) public String handleNoSearchResultException() { return "someView"; }

But not if I add any parameters:

@ExceptionHandler(NoSearchResultException.class) public String handleNoSearchResultException(Exception e) { return "someView"; }

What could possibly be happening? Also, I've read @ExceptionHandler does not support Model arguments, so how would I pass a parameter (like the error message for instance) to the view in order to offer a dynamic error page?

@ExceptionHandler does support the Model but only as a return value NOT as an argument. So you can put whatever you like in there (you could even return a ModelAndView with everything in it, instead of only a view name). More information about supported method argument types and return value types in the javadoc. Could you post your mvc configuration and which Spring version are you using. — M. Deinum
– M. Deinum, Commented Sep 2, 2013 at 11:20

Krešimir Nesek · Accepted Answer · 2013-09-02 11:31:07Z

To pass a parameter to the view I would create a custom Exception class in which you can store any required model parameters (such as error messages). Then in @ExceptionHandler method you can extract those model parameters and make them available in the view. For example:

class RequestException extends RuntimeException { ... public void setErrorMessages(List<String> errorMsgs) { this.errorMessages = errorMsgs } ... } @ExceptionHandler(RequestException.class) public ModelAndView handleNoSearchResultException(RequestException ex) { ModelAndView mav = new ModelAndView("someView"); mav.addObject("errors", ex.getErrorMessages()); //fetch error messages return mav; }

As for parameters, try specifying NoSearchResultException as method parameter instead of it's Exception superclass.

EDIT: Had a bug in 2nd example return value.

Community · Accepted Answer · 2017-05-23 12:20:50Z

I Solved the problem by passing the custom arguments in request itself.

code is as below :

Controller

@RequestMapping(method = RequestMethod.GET, value = "/exception2") public String getException1(ModelMap model, @CRequestParam("p") String p, HttpServletRequest request) { System.out.println("Exception 2 " + p); request.setAttribute("p", p); throw new CustomGenericException("1", "2"); }

Exception Handler

@ExceptionHandler(CustomGenericException.class) public ModelAndView handleCustomException(CustomGenericException ex, HttpServletRequest request) { ModelAndView model2 = new ModelAndView("error/generic_error"); model2.addObject("exception", ex); System.out.println(request.getAttribute("p")); System.out.println("CustomGenericException "); return model2; }

here is Sackoverflow question and its answer and

Complete source code is available at git

Collectives™ on Stack Overflow

@ExceptionHandler with parameters not working

2 Answers 2

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Linked

Related