Spring 3 exception handling using JSON

Question

I have a Controller , and I want to get user feedback on what went wrong. An error callback is performed, but the error message is not sent back to the client.

JQuery call:

 var validateButton = $('#validateSteps'); validateButton.bind('click', function() { var stepsInput = $(':input').serializeArray(); $.postJSON('validate.htm', stepsInput, function(data) { alert(data); var steps = $('#steps'); var i = 0; for(i=0;i<data.length;i++) { steps.stepWidget('setValidationStatus', {testStepId: data[i].testStepId, interactionType: data[i].interactionType, validationStatus: data[i].validationStatus} ); steps.stepWidget('setErrorDescriptions', {testStepId: data[i].testStepId, interactionType: data[i].interactionType, errorDescriptions: data[i].errorDescriptions} ); } return false; }, { error: function (XMLHttpRequest, textStatus, errorThrown, data) { alert("error function"); alert(textStatus); alert(errorThrown); alert("Internal Server Error: " + data); return false; } }); return false; }); 

Controller:

 @RequestMapping(value = "validate.htm", method = RequestMethod.POST) public @ResponseBody List<ValidationBean> validateSteps( @RequestBody List<Map<String, String>> testCaseInputs, HttpServletResponse response) throws MalformedMessageException, MalformedProfileException, XmlException, IOException, MissingDependencyException, MessageValidationException { List<ValidationBean> validations = new ArrayList<ValidationBean>(); ... return validations; } 

The exception handler in the controller:

 @ExceptionHandler(Exception.class) public @ResponseBody String handleException(Exception e, HttpServletResponse response) { response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); return e.getMessage(); } 

I want to show the user String that should be returned by the handleException method. In the error callback, the data parameter is undefined .

Answer 1

Mark your answer to a very similar question: Spring MVC returns JSONS and exception handling