Java 使用响应状态代码处理Spring MVC错误

请在这个问题上帮助我。 我正在处理的项目是旧的mvc，不会更改为rest，因此必须处理我们所拥有的：。 这是我的控制器方法，它的类是anotated@controller

这是handleError方法体

    private String handleError(Exception ex, String operation, SomeCustomListenerClass listener) {
    if (!listener.hasErrors()) {
        log.error("Unexpected error getting notification detail", ex);
        listener.error("notification.controllerException", operation);
    }
    return "error";
}

现在我在客户端得到了正确的错误，比如在浏览器中，但也得到了状态代码500

现在我的老板说，当验证错误出现时，我们必须得到400，而不是现在的500。

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所以，请帮助我，伙计们，如何克服这个问题。

尝试@ExceptionHandler注释或@ControllerAdvice创建自定义异常处理机制：

将@ResponseStatusHttpStatus.BAD_请求添加到handleError顶部。。。方法

@ExceptionHandler({ Throwable.class })
@ResponseStatus(HttpStatus.BAD_REQUEST)
public String handleError(...) {
   ...
}

---

您可以扩展异常并将其抛出控制器：

@ResponseStatus(value=HttpStatus.BAD_REQUEST, reason="Your exception message")  
public class YourCustomException extends RuntimeException {
}

或者，您可以使用ExceptionControllerHandler：

@Controller
public class ExceptionHandlingController {

  // @RequestHandler methods
  ...
  
  // Exception handling methods
  
  // Convert a predefined exception to an HTTP Status code
  @ResponseStatus(value=HttpStatus.CONFLICT,
                  reason="Data integrity violation")  // 409
  @ExceptionHandler(DataIntegrityViolationException.class)
  public void conflict() {
    // Nothing to do
  }
  
  // Specify name of a specific view that will be used to display the error:
  @ExceptionHandler({SQLException.class,DataAccessException.class})
  public String databaseError() {
    // Nothing to do.  Returns the logical view name of an error page, passed
    // to the view-resolver(s) in usual way.
    // Note that the exception is NOT available to this view (it is not added
    // to the model) but see "Extending ExceptionHandlerExceptionResolver"
    // below.
    return "databaseError";
  }

  // Total control - setup a model and return the view name yourself. Or
  // consider subclassing ExceptionHandlerExceptionResolver (see below).
  @ExceptionHandler(Exception.class)
  public ModelAndView handleError(HttpServletRequest req, Exception ex) {
    logger.error("Request: " + req.getRequestURL() + " raised " + ex);

    ModelAndView mav = new ModelAndView();
    mav.addObject("exception", ex);
    mav.addObject("url", req.getRequestURL());
    mav.setViewName("error");
    return mav;
  }
}

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我确实像你说的那样，但无论如何，它返回500，不知道为什么它不起作用。你的方法上有@ExceptionHandler吗。你能试一下更新的答案吗。您是否能够调试，调试器点是否进入此方法？它不是spring boot应用程序，它是mvc，而不是rest，如果我喜欢您所显示的，我将不会填充所需的错误字段，只会向客户端提供状态，但我还需要提供错误和状态。请尝试以下操作：

@Controller
public class ExceptionHandlingController {

  // @RequestHandler methods
  ...
  
  // Exception handling methods
  
  // Convert a predefined exception to an HTTP Status code
  @ResponseStatus(value=HttpStatus.CONFLICT,
                  reason="Data integrity violation")  // 409
  @ExceptionHandler(DataIntegrityViolationException.class)
  public void conflict() {
    // Nothing to do
  }
  
  // Specify name of a specific view that will be used to display the error:
  @ExceptionHandler({SQLException.class,DataAccessException.class})
  public String databaseError() {
    // Nothing to do.  Returns the logical view name of an error page, passed
    // to the view-resolver(s) in usual way.
    // Note that the exception is NOT available to this view (it is not added
    // to the model) but see "Extending ExceptionHandlerExceptionResolver"
    // below.
    return "databaseError";
  }

  // Total control - setup a model and return the view name yourself. Or
  // consider subclassing ExceptionHandlerExceptionResolver (see below).
  @ExceptionHandler(Exception.class)
  public ModelAndView handleError(HttpServletRequest req, Exception ex) {
    logger.error("Request: " + req.getRequestURL() + " raised " + ex);

    ModelAndView mav = new ModelAndView();
    mav.addObject("exception", ex);
    mav.addObject("url", req.getRequestURL());
    mav.setViewName("error");
    return mav;
  }
}