用户登录时出现服务器异常，并且IDEA没有提示异常信息
Controller

    @ResponseBody
    public Result<MiaoshaUser> doLogin( HttpServletResponse response,@Valid LoginVo loginVo){
        logger.info(loginVo.toString());
        MiaoshaUser user=miaoshaUserService.getUser(response,loginVo);
        if(user!=null){
            logger.info("登录成功");
            return Result.success(user);
        }
        //throw new GlobleException(CodeMsg.USER_NULL);
        return null;
    }在这里输入代码

Service

 public MiaoshaUser getUser(HttpServletResponse response,LoginVo loginVo) {
        MiaoshaUser user=new MiaoshaUser();
        user.setNickname(loginVo.getMobile());
        user.setPassword(MD5Util.inputPassToDbPass(loginVo.getPassword(),"1a2b3c4d"));
        MiaoshaUser miaoshaUser=miaoshaUserDao.getUser(user);
        String token= UUIDItil.uuid();
        redisService.set(MiaoshaUserKey.token,token,miaoshaUser);
        Cookie cookie=new Cookie(COOKIE_NAME_TOKEN,token);
        cookie.setMaxAge(MiaoshaUserKey.token.expireSeconds());
        cookie.setPath("/");
        response.addCookie(cookie);
        return miaoshaUser;
    }