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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