在Spring MVC中返回NoSuchRequestHandlingMethodException 404错误的自定义视图

Question

Whenever user types a wrong url in browser it results in NoSuchRequestHandlingMethodException I want to return a customize view rather than the default view that spring provides with a message. I have @AdviceController in which I tried to catch it through @ExceptionHAndler(NoSuchRequestHandlingMethodException.class) and return a view but it didn't work. I also inherited DefaultHandlerExceptionResolver and overidden the method that handles NoSuchRequestHandlingMethodException , this also didn't work. I also tried to register view names to exceptions through extending SimpleMappingExceptionResolver setExecptionMapping (in same @AdviceController class) method that also didn't one work. I don't know what I am doing wrong. Am I even right about that spring throws NoSuchRequestHandlingMethodException when it doesn't find any mappings in controller Can somebody tell me how to return custom views for Spring Exceptions that are matched with HTTP error codes.

This is my @ControllerAdvice

@ControllerAdvice
public class ExceptionHandlerController extends     
DefaultHandlerExceptionResolver {

@ExceptionHandler(NoSuchRequestHandlingMethodException.class)
public String handleException(NoSuchRequestHandlingMethodException.class, Model model) {

    String error = th.getMessage();
    model.addAttribute("error", error);
    model.addAttribute(new User());
    return "login";
   }

@override
protected ModelAndView handleNoSuchRequestHandlingMethodException
(NoSuchRequestHandlingMethodException ex, HttpServletRequest request, 
HttpServletResponse response, Object handler) throws Exception {

      ModelAndView mav = new ModelAndView("notfound");
      return mav;
   }
}

UPDATE: Solution

The reason that NoSuchRequestHandlingMethodException does not get raised is because Dispatcher Servlet delegates request to default servlet handler(in my case DefaultServletHttpRequestHandler ) and considered it handled. The workaround that I have implemented is that I have created a handler method with mapping '/*' that is executed when there is no specific mapping found in any controller and there I through new NoSuchRequestHandlingMethodException which can be caught in @ExceptionHandler and then returned a custom view. However, I do not know the downside of handling exception like this. If any let me know.

@Controller
public class HomeController {

...

@RequestMapping(value = "/*", method = RequestMethod.GET )
public void handleAtLast(HttpServletRequest request) throws NoSuchRequestHandlingMethodException {
    throw new NoSuchRequestHandlingMethodException(request);
  }
}

ExceptionHandlerController.java

@ControllerAdvice
public class ExceptionHandlerController extends DefaultHandlerExceptionResolver {
   @ExceptionHandler(NoSuchRequestHandlingMethodException.class)
   public String handleNoSuchMethodtFoundException(NoSuchRequestHandlingMethodException ex){
       return "error/notfound";
    }
}

Answer 1

try this way

@ControllerAdvice
public class AppWideExceptionHandler {

    @ExceptionHandler(Exception.class) // replace with your exception Class
    public String errorHandler(){
        System.out.println("caught exception");
        return "home"; // your view
    }
}

Answer 2

The reason that NoSuchRequestHandlingMethodException does not get raised is because Dispatcher Servlet delegates request to default servlet handler(in my case DefaultServletHttpRequestHandler ) and considered it handled. The workaround that I have implemented is that I have created a handler method with mapping '/*' that is executed when there is no specific mapping found in any controller and there I through new NoSuchRequestHandlingMethodException which can be caught in @ExceptionHandler and then returned a custom view. However, I do not know the downside of handling exception like this. If any let me know.

@Controller
public class HomeController {

...

@RequestMapping(value = "/*", method = RequestMethod.GET )
public void handleAtLast(HttpServletRequest request) throws NoSuchRequestHandlingMethodException {
    throw new NoSuchRequestHandlingMethodException(request);
  }
}

ExceptionHandlerController.java

@ControllerAdvice
public class ExceptionHandlerController extends DefaultHandlerExceptionResolver {
   @ExceptionHandler(NoSuchRequestHandlingMethodException.class)
   public String handleNoSuchMethodtFoundException(NoSuchRequestHandlingMethodException ex){
       return "error/notfound";
    }
}