自定义全局异常处理器

public class RtopExceptionHandler implements HandlerExceptionResolver{

    private static final Logger logger = LoggerFactory.getLogger(RtopExceptionHandler.class);

    @Override    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object o,                                         Exception ex) {

        //处理buservice的异常        response.setContentType("application/json");        response.setCharacterEncoding("utf-8");

        if(ex instanceof AccessException) {            if(BuserviceConstants.HANDLER_DIGEST_LOGGER.isInfoEnabled()) {                BuserviceConstants.HANDLER_DIGEST_LOGGER.info("The current request failed, the reason:" + ex);            }

            AccessException e = (AccessException)ex;            String redirectUrl = e.getRedirectUrl();            String requestURI = request.getRequestURI();            if(StringUtils.endsWithIgnoreCase(requestURI, ".json")) {                try {                    ErrorCodeEnum errorCode = e.getErrorCode();                    String buserviceErrorCode = errorCode == null? ErrorCodeEnum.UNKNOW.name():errorCode.name();                    String buserviceErrorMsg = errorCode == null? ErrorCodeEnum.UNKNOW.getDescCn():errorCode.getDescCn();

                    RtopHttpResult result = RtopHttpResult.Failure(buserviceErrorCode, buserviceErrorMsg);

                    if(ErrorCodeEnum.USER_NOT_LOGIN == errorCode){                        //如果返回的错误是用户未登录,则将请求强制改为success,为了防止前端弹框展示错误信息.由前端直接跳转到登录页面.                        result.setSuccess(true);                    }

                    PrintWriter pw = response.getWriter();                    String callback = request.getParameter("callback");                    if(StringUtil.isNotBlank(callback)) {                        pw.print(callback + "(" + JSON.toJSONString(result) + ")");                    } else {                        pw.print(JSON.toJSON(result));                    }

                    pw.close();                } catch (Exception var13) {                    BuserviceConstants.HANDLER_DIGEST_LOGGER.info("The current JSON request fails, intercepting failure:" + var13);                }

            } else {                return StringUtil.isNotBlank(redirectUrl)?this.returnPage("redirect:" + redirectUrl, ex, new ModelAndView()):this.returnPage("/error", ex, new ModelAndView());

            }        }else if(ex instanceof ErrorCodeException){            ErrorCodeException errorCodeException = (ErrorCodeException) ex;            LoggerUtil.error(errorCodeException, "");

            String errorCode = errorCodeException.getErrorCode().getCode();            String errorMsg = errorCodeException.getErrorCode().getMessage();            RtopHttpResult result = RtopHttpResult.Failure(errorCode, errorMsg);

            try{                PrintWriter pw = response.getWriter();                pw.print(JSON.toJSON(result));                pw.close();            }catch (Exception e) {                LoggerUtil.info(logger, "response in RtopExceptionHandler error" + e.getMessage());            }

        }else if(ex instanceof RuntimeException){            if(ex instanceof  IllegalStateException){                return null;            }            LoggerUtil.error(ex, "");

            RtopHttpResult result = RtopHttpResult.Failure(RtopAppErrorCode.INTERNAL_ERROR);

            try{                PrintWriter pw = response.getWriter();                pw.print(JSON.toJSON(result));                pw.close();            }catch (Exception e) {                LoggerUtil.info(logger, "response in RtopExceptionHandler error" + e.getMessage());            }

        }

        return null;    }

    public ModelAndView returnPage(String page, Exception ex, ModelAndView view) {        view.addObject("exception", ex);        view.setViewName(page);        return view;    }}

原文地址：https://www.cnblogs.com/wwqwwq/p/10919674.html