springmvc 使用jsr303校驗返回400錯誤

如果一個方法中有參數被 @Valid 標註了，但該參數後面沒有緊跟一個 BindingResult 類型的參數，那麼提交到該方法時，將返回 400 錯誤。
錯誤消息將會是：The request sent by the client was syntactically incorrect ().

錯誤的方法定義 1 ：（錯誤原因：沒有 BindingResult 參數）

@RequestMapping({"error400" })
public String error400(@Valid @ModelAttribute("testForm") TestForm testForm) {
return"test";
}
錯誤的方法定義 2 ：（錯誤原因：沒有緊跟在 @Valid 參數之後）

@RequestMapping({"error400" })
public String error400(@Valid @ModelAttribute("testForm") TestForm testForm, Model model, Errors result) {
return"demo/front/test";
}
也可參考 DefaultHandlerExceptionResolver.java 中的方法說明：

/**
* Handle the case where an {@linkplain ModelAttribute @ModelAttribute} method
* argument has binding or validation errors and is not followed by another
* method argument of type {@link BindingResult}.
* By default an HTTP 400 error is sent back to the client.
* @param request current HTTP request
* @param response current HTTP response
* @param handler the executed handler
* @return an empty ModelAndView indicating the exception was handled
* @throws IOException potentially thrown from response.sendError()
*/
protectedModelAndView handleBindException(BindException ex, HttpServletRequest request,
HttpServletResponse response, Object handler)throws IOException {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
returnnew ModelAndView();
}

轉自：http://blog.csdn.net/lougnib/article/details/9973257