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copied!<p>As said:</p> <blockquote> <p>What I want is the <strong>specific error message generated by the PropertyEditor</strong> to surface to the error message on the Spring form</p> </blockquote> <p>Behind the scenes, Spring MVC uses a BindingErrorProcessor strategy for processing missing field errors, and <strong>for translating a PropertyAccessException to a FieldError</strong>. So if you want to override default Spring MVC BindingErrorProcessor strategy, you must provide a BindingErrorProcessor strategy according to:</p> <pre><code>public class CustomBindingErrorProcessor implements DefaultBindingErrorProcessor { public void processMissingFieldError(String missingField, BindException errors) { super.processMissingFieldError(missingField, errors); } public void processPropertyAccessException(PropertyAccessException accessException, BindException errors) { if(accessException.getCause() instanceof IllegalArgumentException) errors.rejectValue(accessException.getPropertyChangeEvent().getPropertyName(), "<SOME_SPECIFIC_CODE_IF_YOU_WANT>", accessException.getCause().getMessage()); else defaultSpringBindingErrorProcessor.processPropertyAccessException(accessException, errors); } } </code></pre> <p>In order to test, Let's do the following</p> <pre><code>protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder) { binder.registerCustomEditor(SSN.class, new PropertyEditorSupport() { public String getAsText() { if(getValue() == null) return null; return ((SSN) getValue()).toString(); } public void setAsText(String value) throws IllegalArgumentException { if(StringUtils.isBlank(value)) return; boolean somethingGoesWrong = true; if(somethingGoesWrong) throw new IllegalArgumentException("Something goes wrong!"); } }); } </code></pre> <p>Now our Test class</p> <pre><code>public class PersonControllerTest { private PersonController personController; private MockHttpServletRequest request; @BeforeMethod public void setUp() { personController = new PersonController(); personController.setCommandName("command"); personController.setCommandClass(Person.class); personController.setBindingErrorProcessor(new CustomBindingErrorProcessor()); request = new MockHttpServletRequest(); request.setMethod("POST"); request.addParameter("ssn", "somethingGoesWrong"); } @Test public void done() { ModelAndView mav = personController.handleRequest(request, new MockHttpServletResponse()); BindingResult bindingResult = (BindingResult) mav.getModel().get(BindingResult.MODEL_KEY_PREFIX + "command"); FieldError fieldError = bindingResult.getFieldError("ssn"); Assert.assertEquals(fieldError.getMessage(), "Something goes wrong!"); } } </code></pre> <p>regards,</p>

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