springmvc异常拦截器

springmvc异常拦截器

1. 列表内容

实现HandlerExceptionResolver接口

package com.gaofei.web.exception;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.core.PriorityOrdered;import org.springframework.http.HttpStatus;import org.springframework.http.MediaType;import org.springframework.web.servlet.HandlerExceptionResolver;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;/** * Created by GaoQingming on 2017/11/9 0009. */public class DefaultExceptionHandler implements HandlerExceptionResolver, PriorityOrdered {    Logger logger = LoggerFactory.getLogger(DefaultExceptionHandler.class);    public int getOrder() {        return 0;    }    //X-Requested-With:XMLHttpRequest这种就是ajax请求    //    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object o, Exception e) {        logger.error("系统出错url:{},params:{},userHost:{}",request.getRequestURL(),request.getParameterMap(),request.getRemoteHost(),e);        if(isAjax(request)) {            ModelAndView modelAndView = new ModelAndView();            /*  使用response返回    */            response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value()); //设置状态码            response.setContentType(MediaType.APPLICATION_JSON_VALUE); //设置ContentType            response.setCharacterEncoding("UTF-8"); //避免乱码            response.setHeader("Cache-Control", "no-cache, must-revalidate");            try {                response.getWriter().write("{\"status\":0,\"success\":false,\"msg\":\"" + e.getMessage() + "\"}");            } catch (IOException ex) {                logger.error("与客户端通讯异常:"+ ex.getMessage(), ex);            }            return modelAndView;        } else {            return new ModelAndView("500");            //这里要加http://，否则会在当前请求下拼接，导致找不到            //return new ModelAndView("redirect:" + "http://www.gaofei.com/dubboweb/login/error");        }    }    private boolean isAjax(HttpServletRequest request) {        String requestType = request.getHeader("X-Requested-With");        if("XMLHttpRequest".equals(requestType)){            return true;            //System.out.println("AJAX请求..");        }else{            return false;            //System.out.println("非AJAX请求..");            //此时requestType为null        }    }}

2.配置

 <bean id="exceptionHandler" class="com.gaofei.web.exception.DefaultExceptionHandler"/>