全局异常处理

package com.mmall.common;

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.json.MappingJacksonJsonView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


@Slf4j
@Component//代表注入到bean
public class ExceptionResolver implements HandlerExceptionResolver{

    @Override
    public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o,

 Exception e) {
        log.error("{} Exception",httpServletRequest.getRequestURI(),e);
        ModelAndView modelAndView = new ModelAndView(new MappingJacksonJsonView());

        //当使用是jackson2.x的时候使用MappingJackson2JsonView，课程中使用的是1.9。
        modelAndView.addObject("status",ResponseCode.ERROR.getCode());
        modelAndView.addObject("msg","接口异常,详情请查看服务端日志的异常信息");
        modelAndView.addObject("data",e.toString());
        return modelAndView;
    }

}

设置个异常：

    @RequestMapping(value = "login1.do",method = RequestMethod.GET)
    @ResponseBody
    public ServerResponse<User> login1(String username, String password, HttpSession session, HttpServletResponse httpServletResponse){
        //测试全局异常
        int i=0;
        int j=999/i;
        ServerResponse<User> response = iUserService.login(username,password);
        if(response.isSuccess()){

//            session.setAttribute(Const.CURRENT_USER,response.getData());
            CookieUtil.writeLoginToken(httpServletResponse,session.getId());
            RedisShardedPoolUtil.setEx(session.getId(), JsonUtil.obj2String(response.getData()),Const.RedisCacheExtime.REDIS_SESSION_EXTIME);

        }
        return response;
    }

启动测试：