使用jquery从ajax响应中获取Http状态代码

在我目前的春季项目中，当我向服务器提交表单时，响应由此方法处理：

In my current spring project, when I submit a form to server, the response is handled by this method:

    $('form.form').each(function () {
        var form = this;
        $(form).ajaxForm(function (data) {
            form.reset();
            $(".alert-info").find("#alert").html(data);
            $(".alert-info").show();
        });
    });

在我的控制器中，提交是通过以下方法处理的：

In my controller, the submission is handled by a method like this:

@RequestMapping(value="cadastra", method=RequestMethod.POST)
@ResponseBody
@ResponseStatus(HttpStatus.CREATED)
public void cadastra(@ModelAttribute("object") E object, BindingResult result, @RequestParam(value="file", required=false) MultipartFile file, @RequestParam(value="icone", required=false) MultipartFile icone, @RequestParam(value="screenshot", required=false) MultipartFile screenshot[]) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, IOException {
    serv.cadastra(object);
    serv.upload_picture(object, file, "picture");
    serv.upload_picture(object, icone, "icone");
}

来自控制器的方法的错误响应由此ControllerAdvice类处理：

Error responses from the methods from the controller are handled by this ControllerAdvice class:

@ControllerAdvice
@PropertySource({"classpath:error.properties"})
public class GlobalDefaultExceptionHandler {

    @Autowired
    private Environment env;

    @ExceptionHandler(value = Exception.class)
    public ModelAndView defaultErrorHandler(HttpServletRequest req, Exception e) throws Exception {
        // If the exception is annotated with @ResponseStatus rethrow it and let
        // the framework handle it - like the OrderNotFoundException example
        // at the start of this post.
        // AnnotationUtils is a Spring Framework utility class.
        if (AnnotationUtils.findAnnotation(e.getClass(), ResponseStatus.class) != null)
            throw e;
        // Otherwise setup and send the user to a default error-view.
        ModelAndView mav = new ModelAndView();
        mav.addObject("exception", e);
        mav.addObject("url", req.getRequestURL());
        mav.addObject("msg", e.getLocalizedMessage());
        mav.setViewName("erro");
        return mav;
    }

}

我正在寻找一种方法在我的jquery代码中从响应中读取http状态代码（可以是1xx，2xx，3xx，4xx或5xx），并根据此代码显示相关消息。

I am looking for a way to read the http status code from response (which can be 1xx, 2xx, 3xx, 4xx or 5xx) in my jquery code, and display a related message according to this code.

在浏览器的网络监视器中，我可以看到成功的响应已经在方法中实现了代码HTTP 201;当发生错误时，响应应该有一个代码4xx或5xx，具体取决于触发的异常。

In the network monitor from browser, I can see a successful response already have the code HTTP 201 as implemented in the method; when an error occurs, the response should have a code 4xx or 5xx, depending from exception triggered.

这样，我想知道是否有人可以提示如何修改我的jquery代码和我的COntrollerAdvice来完成这个。

In this way, I wonder if anyone can give a hint of how modify my jquery code and my COntrollerAdvice to accomplish this.