java redis 实现简单的用户签到功能
业务需求是用户每天只能签到一次,而且签到后用户增加积分,所以把用户每次签到时放到redis 缓存里面,然后每天凌晨时再清除缓存,大概简单思想是这样的
直接看代码吧如下
@Transactional @Override public void signIn(Integer memberId) throws BizException { if(memberId==null){ throw new BizException(ErrorCode.BIZ_EXCEPTION.getErrcode(), "签到用户id 不能为null"); } String day = DateFormatUtils.format(new Date(), "yyyyMMdd"); String key = "signin:"+day; Boolean sismember = redisClient.sismember(key, memberId.toString()); if(sismember){ throw new BizException(ErrorCode.BIZ_EXCEPTION.getErrcode(), "今天已经签到了"); }else{ redisClient.sadd(key, memberId.toString()); redisClient.expire(key, getRefreshTime()); addPointsRecord(memberId,IntegralType.SIGN_IN);//给用户增加积分 } }
获取离凌晨 还有多久
/** * 获取当前时间离明天凌晨还有多少小时 * @return */ public static int getRefreshTime(){ Calendar calendar = Calendar.getInstance(); int now = (int) (calendar.getTimeInMillis()/1000); calendar.add(Calendar.DATE, 1); calendar.set(Calendar.SECOND, 0); calendar.set(Calendar.MINUTE, 0); calendar.set(Calendar.HOUR_OF_DAY , 0); return (int) (calendar.getTimeInMillis()/1000-now); }
Controller
/** * 签到 * @return */ @WeiXinLogin @RequestMapping("/signIn") public ResponseModel signIn(){ try { Integer memberId = RequestContext.getContext().getUser().getMemberId(); memberApi.signIn(memberId); return new ResponseModel(); } catch (BizException e) { LOGGER.error("signIn error"); return new ResponseModel(e.getErrcode(), e.getErrm(), null); } }
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