一分鐘之內(nèi)只能發(fā)送一次短信,

若用戶刷新頁面,然后輸入原來的手機號,則繼續(xù)計時

方案:服務(wù)器端要記錄時間戳

方法名:sMSWaitingTime

功能:返回倒計時剩余時間,單位秒

?

Java代碼??

/***?

?????*?倒計時還剩余多長時間?

?????*?@param?mobile?:?手機號?

?????*?@return?:?second?

?????*/??

????public?int?sMSWaitingTime(String?mobile)?{??

????????HttpServletRequest?request?=?((ServletRequestAttributes)?RequestContextHolder.getRequestAttributes()).getRequest();??

????????HttpServletResponse?response?=?((ServletRequestAttributes)?RequestContextHolder.getRequestAttributes()).getResponse();??

????????RedisHelper?rdsHelper?=?RedisHelper.getInstance();??

????????String?cid?=?getCid(request,?response);??

??????????

????????String?lastSendSMSTime?=?rdsHelper.getCache(cid+mobile);//getKeyCache(request,?response,?mobile)?;??

??

????????if(StringUtil.isNullOrEmpty(lastSendSMSTime))?{??

????????????saveExpxKeyCache(request,?response,?mobile,?String.valueOf(DateTimeUtil.getCurrentTimeSecond()),60);??

????????????return?0;??

????????}?else?{??

????????????long?lastSendSMSTimeSecond=Long.parseLong(lastSendSMSTime);??

????????????long?currentTimeSecond=DateTimeUtil.getCurrentTimeSecond();??

????????????int?delter=(int)?(currentTimeSecond-lastSendSMSTimeSecond);??

????????????System.out.println("delter:"+delter);??

????????????if(delter>=60){??

????????????????return?0;??

????????????}else{??

????????????????return?60-delter;??

????????????}??

????????}??

????}??

?

jedis 可以設(shè)置key的超時時間:

Java代碼??

public?/*synchronized*/?void?saveExpxKeyCache(HttpServletRequest?request,?HttpServletResponse?response,?String?k,?String?v,long?time)?{??

??

????????String?cid?=?getCid(request,?response);??

??

//????????logger.debug("cid?is?"?+?cid);??

//????????logger.debug("set?"?+?k?+?"?to?value?:?"?+?v);??

??

????????RedisHelper?helper?=?RedisHelper.getInstance();??

????????helper.saveExpxKeyCache(cid+k,??v,time);??

??

//????????jedis.hset(httpSession.getId(),?k,?v);??

//????????jedis.expire(httpSession.getId(),?3600);??

??

??

????}??

??

?/***?

?????*?Only?set?the?key?if?it?does?not?already?exist?

?????*?

?????*?@param?k?

?????*?@param?v?

?????*?@param?time?:?second?

?????*/??

????public?void?saveExpxKeyCache(String?k,?String?v,?long?time)?{??

????????saveExpxKeyCache(k,?v,?"NX",?time);??

????}??

??

????/***?

?????*?@param?k?

?????*?@param?v?

?????*?@param?nxxx?:??NX|XX,?NX?--?Only?set?the?key?if?it?does?not?already?exist.?XX?--?Only?set?the?key?

?????*?????????????if?it?already?exist.?

?????*?@param?time?:?second?

?????*/??

????public?void?saveExpxKeyCache(String?k,?String?v,?String?nxxx,?long?time)?{??

????????Jedis?jedis?=?Const.pool.getResource();??

????????try?{??

????????????jedis.set(k,?v,?nxxx,?"EX"/*seconds*/,?time);??

????????}?catch?(Exception?e)?{??

????????????e.printStackTrace();??

????????????logger.error("saveKeyCache",?e);??

????????????Const.pool.returnBrokenResource(jedis);??

????????????jedis?=?null;??

????????}?finally?{??

????????????if?(jedis?!=?null)?{??

????????????????Const.pool.returnResource(jedis);??

????????????}??

????????}??

????}??

?

?

參考:

http://hw1287789687.iteye.com/blog/2225130

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