从数据库查询 获取 返回list，存在redis小案例

 /**
     *  用户对象
     * @param request 请求
     * @return 结果
     */
    public Map<String,Object> queryUserByOrg1(HttpServletRequest request){
        String key=CookieUtil.getKeyFromTokenCookie(request);
        String org=redisUtil.hashGet(key,"org");

        Long expire=redisUtil.getExpire(org);
        List<UserModel> modelList=new ArrayList<>();
        if(expire>0){
            modelList = JSON.parseArray(redisUtil.get(org).toString(),UserModel.class);
        }else{
            PageHelper.startPage(1, 10);
            PageInfo<User> pageInfo = new PageInfo<>(userMapper.selectByParam(org));
            
            List<User> list=pageInfo.getList();
            for(User user:list){
                UserModel userModel=new UserModel();
                userModel.setId(user.getId());
                userModel.setUserName(user.getUserName());
                userModel.setIsValid(user.getIsValid());
                modelList.add(userModel);
            }
            redisUtil.set(org,JSON.toJSON(modelList).toString());
            redisUtil.expire(org,30L,TimeUnit.MINUTES);
        }

        Map<String, Object> map = new HashMap<>();
        map.put("code",0);
        map.put("msg", "success");
        map.put("count", modelList.size());
        map.put("data",modelList);
        return map;
    }