java實(shí)現(xiàn)砸金蛋抽獎(jiǎng)功能

更新時(shí)間：2020年11月26日 11:42:58 作者：門(mén)衛(wèi)向大爺

這篇文章主要為大家詳細(xì)介紹了java實(shí)現(xiàn)砸金蛋抽獎(jiǎng)功能，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了java實(shí)現(xiàn)砸金蛋抽獎(jiǎng)的具體代碼，供大家參考，具體內(nèi)容如下

代碼如下

需求：用戶(hù)每一次砸金蛋，抽中一等獎(jiǎng)的概率為2% 二等獎(jiǎng)10% 三等獎(jiǎng)18% 四等獎(jiǎng)70%。

累計(jì)砸第n次時(shí)必抽中x等獎(jiǎng)以上的獎(jiǎng)品。比如，累計(jì)砸第5次，則此次必中二等獎(jiǎng)及以上的獎(jiǎng)品。且配置的此次必中中獎(jiǎng)概率不一樣。

/**
 * 金蛋抽獎(jiǎng)
 * userId : 抽獎(jiǎng)用戶(hù)ID
 * consumeType : 抽獎(jiǎng)消耗的物品 1：金幣 2：次數(shù)
 */
 @Override
 public Map<String, Object> eggsLottery(Integer userId, Integer consumeType) {
   /*******first : check user ************/
   checkUserIsLock(userId);
   logger.info("userId {} start lottery -eggs.", userId);
   Jedis jedis = RedisPool.getJedis();
   try {
     //查詢(xún)活動(dòng)開(kāi)關(guān)
     String hget = jedis.hget(Rkey.SMASH_GOLD_EGGS_GLOBAL_CONFIG, "status");
     if (null == hget || "0".equals(hget)) {
       throw new BusiException(E.INVALID_PARAMETER, "活動(dòng)暫未開(kāi)啟,敬請(qǐng)期待");
     }
     //check lottery type
     Long consumeScore = 0L;

     /**score lottery**/
     consumeScore = jedis.hincrBy(Rkey.SMASH_GOLD_EGGS_GLOBAL_CONFIG, "consumeGoldScore", 0);
     if (consumeScore < 1) {
       throw new BusiException(E.EGGS_ACTIVITY_CONFIG_EXCEPTION, "活動(dòng)配置有誤！");
     }
     long surScore = goldWalletMapper.selectAmountGoldByUserId(userId);
     surScore = surScore - consumeScore;
     if (surScore < 0) {
       throw new BusiException(E.SCORE_NOT_ENOUGH, "您的金幣不足");
     }
     // 砸金蛋之前扣除金幣
     Date now = new Date();
     reduceGold(consumeScore, now, userId);

     /*******second : lottery ************/
     Map<String, Object> map;
     try {
       map = lottery(jedis, now, userId, consumeScore);
       // 抽獎(jiǎng)結(jié)束后 記錄今日總共完成的抽獎(jiǎng)次數(shù) +1
       // 必中 不加
       jedis.hincrBy(Rkey.SMASH_GOLD_EGGS_USER_WIN_TOTAL_COUNT, userId.toString(), 1);
     } catch (Exception e) {
       throw e;
     }
     return map;
   } finally {
     RedisPool.returnJedis(jedis);
   }
 }

 /**
 * 抽獎(jiǎng) begin----
 */
 private Map<String, Object> lottery(Jedis jedis, Date now, Integer userId, Long consumeScore) {
   Map<String, Object> map = new HashMap<String, Object>();
   // 判斷本次是否是必中？ jackpotType=1： 不是 2:是必中
   Integer jackpotType = 1;
   // 剩余次數(shù)
   Integer freeCount = 0;
   String countStr = jedis.hget(Rkey.SMASH_GOLD_EGGS_USER_WIN_COUNT, userId.toString());
   if (StringUtils.isNotEmpty(countStr)) {
     Integer count = Integer.valueOf(countStr);
     String whenAwardCount = jedis.hget(Rkey.SMASH_GOLD_EGGS_GLOBAL_CONFIG, "whenAwardCount");

     if (StringUtils.isEmpty(whenAwardCount)) {
       throw new BusiException(E.INVALID_REQUEST, "請(qǐng)先完善砸金蛋全局配置");
     }
     freeCount = Integer.valueOf(whenAwardCount) - count - 1;

     if (count >= Integer.valueOf(whenAwardCount) - 1) {
       logger.info("此次是必中....");
       // 此次是必中
       jackpotType = 2;
       // 抽獎(jiǎng)結(jié)束后 先把記錄總共完成的抽獎(jiǎng)次數(shù) 置為0次
       jedis.hdel(Rkey.SMASH_GOLD_EGGS_USER_WIN_COUNT, userId.toString());
       jedis.hincrBy(Rkey.SMASH_GOLD_EGGS_USER_WIN_COUNT, userId.toString(), 0);
     } else {
       logger.info("此次不是必中....");
     }

     if (freeCount == 0) {
       freeCount = Integer.valueOf(whenAwardCount);
     }
   }

   // 根據(jù)配置得到總的獎(jiǎng)品數(shù)量
   Integer totalCount = 0;
   if (jackpotType == 1) {
     totalCount = getAwardTotalCount(1);
   } else {
     totalCount = getAwardTotalCount(2);
   }
   Integer award = getRandomNumber(totalCount);
   // 看落在哪個(gè)區(qū)間
   Integer awardId = getWinAwardId(award, jackpotType);
   BsGoldEggsConfig goldEggsConfig = goldEggsConfigMapper.selectById(awardId);
   if (goldEggsConfig == null) {
     throw new BusiException(E.INVALID_REQUEST, "獎(jiǎng)品信息未找到");
   }

   map.put("freeCount", freeCount);
   map.put("userId", userId);
   map.put("awardId", awardId);
   map.put("awardName", goldEggsConfig.getDescribe());
   map.put("goldCount", goldEggsConfig.getGoldCount());
   map.put("awardImg", goldEggsConfig.getAwardImg());
   logger.info("userId {} win award {}, 獎(jiǎng)勵(lì)金幣：{}, 隨機(jī)生成抽獎(jiǎng)數(shù)：{}", userId, goldEggsConfig.getDescribe(), goldEggsConfig.getGoldCount(), award);
   // 抽獎(jiǎng)結(jié)束 action：
   if (jackpotType == 1) {
     // 抽獎(jiǎng)結(jié)束后 記錄累計(jì)抽獎(jiǎng)次數(shù) +1
     // 必中 不加
     jedis.hincrBy(Rkey.SMASH_GOLD_EGGS_USER_WIN_COUNT, userId.toString(), 1);
   }
   // 獎(jiǎng)勵(lì)金幣結(jié)算
   Date now1 = new Date();
   lotteryAddGold(goldEggsConfig.getGoldCount().longValue(), now1, userId);
   return map;
 }

 /**
 * 得到中獎(jiǎng)id
 *
 * @param award ： 隨機(jī)生成的抽獎(jiǎng)數(shù)字
 * @return
 */
 private Integer getWinAwardId(Integer award, Integer jackpotType) {
   List<BsGoldEggsConfig> goldEggsConfigList = goldEggsConfigMapper.queryAllList();
   if (goldEggsConfigList == null || goldEggsConfigList.size() < 4) {
     throw new BusiException(E.INVALID_REQUEST, "請(qǐng)先完成砸金蛋獎(jiǎng)品配置！");
   }

   Integer[] weight = new Integer[4];
   if (jackpotType == 1) {
     // 基礎(chǔ)抽獎(jiǎng)
     for (int i = 0; i < goldEggsConfigList.size(); i++) {
       weight[i] = goldEggsConfigList.get(i).getBaseWeight();
     }
   } else {
     // 必中抽獎(jiǎng)
     for (int i = 0; i < goldEggsConfigList.size(); i++) {
       weight[i] = goldEggsConfigList.get(i).getWinWeight();
     }
   }
   // 判斷隨機(jī)數(shù)落在了哪個(gè)區(qū)間 左開(kāi)右閉   ---------- 這里如果用redis的set來(lái)做區(qū)間？如何實(shí)現(xiàn)？
   Integer awardId = 1;
   if (0 < award && award <= weight[0]) {
     // 一等獎(jiǎng)
     awardId = 1;
   } else if (weight[0] < award && award <= (weight[0] + weight[1])) {
     // 二等獎(jiǎng)
     awardId = 2;

   } else if ((weight[0] + weight[1]) < award && award <= (weight[1] + weight[2])) {
     // 三等獎(jiǎng)
     awardId = 3;
   } else {
     // 四等獎(jiǎng)
     awardId = 4;
   }
   return awardId;
 }
 /**
 * 獲取1-max范圍內(nèi) 一個(gè)隨機(jī)數(shù)
 *
 * @param max
 * @return
 */
 private Integer getRandomNumber(Integer max) {
   int i = (int) (Math.random() * max + 1);

   return i;
 }

下面是用獎(jiǎng)池寫(xiě)的一個(gè)算法讀者可忽略，博主只是記錄一下。

思路：

根據(jù)需求：

1.生成兩類(lèi)獎(jiǎng)池（普通獎(jiǎng)池，和必中獎(jiǎng)池），中獎(jiǎng)概率不一樣！為了保證概率正確，我們生成100組（1-100）的數(shù)字，隨機(jī)打亂放入redis中，作為一個(gè)獎(jiǎng)池。

2.生成中獎(jiǎng)區(qū)間，放入redis

3.每次用戶(hù)砸金蛋，從獎(jiǎng)池里面取一個(gè)數(shù)，

4.判斷該數(shù)在哪個(gè)中獎(jiǎng)區(qū)間

/**
 * 抽獎(jiǎng) begin---- 該方法廢除
 */
 private Map<String, Object> lottery2(Jedis jedis, Date now, Integer userId, Long consumeScore) {
   // 從獎(jiǎng)池中拿出第一個(gè)獎(jiǎng)品
   String jackpotKey = Rkey.SMASH_GOLD_EGGS_JACKPOT_ + "one";
   String baseWinLimitKey = Rkey.SMASH_GOLD_EGGS_AWARD_WIN_LIMIT_BASE;
   String nextWinLimitKey = Rkey.SMASH_GOLD_EGGS_AWARD_WIN_LIMIT_NEXT;
   Map<String, Object> map = new HashMap<String, Object>();

   // 獎(jiǎng)池存在 且獎(jiǎng)池不為空
   String awardFlag = jedis.lpop(jackpotKey);  // 如：20
   Integer award = Integer.valueOf(awardFlag);

   //

   if (!StringUtils.isEmpty(awardFlag)) {
     // 判斷該獎(jiǎng)品的等級(jí)
     // 這里是有問(wèn)題的 博主后面糾正
     Set<String> winLimitSet = jedis.zrange(baseWinLimitKey, 0, award - 1);
     if (winLimitSet != null && !winLimitSet.isEmpty()) {
       Integer size = winLimitSet.size();
       List list = new ArrayList(winLimitSet);
       // 取區(qū)間最后一個(gè)
       String lastAwardLevel = String.valueOf(list.get(size - 1));

       // 獲取獎(jiǎng)品info
       Integer id = null;
       if ("one".equals(lastAwardLevel)) {
         id = 1;
       } else if ("two".equals(lastAwardLevel)) {
         id = 2;
       } else if ("three".equals(lastAwardLevel)) {
         id = 3;
       } else if ("four".equals(lastAwardLevel)) {
         id = 4;
       }
       BsGoldEggsConfig goldEggsConfig = goldEggsConfigMapper.selectById(id);
       if (goldEggsConfig == null) {
         throw new BusiException(E.INVALID_REQUEST, "獎(jiǎng)品信息未找到");
       }
       map.put("userId", userId);
       map.put("awardId", id);
       map.put("awardName", goldEggsConfig.getDescribe());
       map.put("goldCount", goldEggsConfig.getGoldCount());
       logger.info("userId {} win award {}, 獎(jiǎng)勵(lì)金幣：{}, 隨機(jī)生成抽獎(jiǎng)數(shù)：{}", userId, goldEggsConfig.getDescribe(), goldEggsConfig.getGoldCount(), award);
     }
   }
   return map;
 }
/**
 * 生成獎(jiǎng)池
 *
 * @param jackpotType : 獎(jiǎng)池類(lèi)型 1：普通獎(jiǎng)池 2：必中獎(jiǎng)池
 * @param jackpotSort ：獎(jiǎng)池序號(hào) 1,2,3...... 如普通獎(jiǎng)池1，普通獎(jiǎng)池2，
 */
 @Override
 public void addAwardToJackpot(Integer jackpotType, Integer jackpotSort) {

   // 存放獎(jiǎng)池?cái)?shù)據(jù)
   List<String> awadList = new ArrayList<>();
   // 獎(jiǎng)池key
   String jackpotKey = "";
   String jackpotTypeToStr = "";
   if (jackpotType == 1) {
     jackpotTypeToStr = "普通";
     jackpotKey = Rkey.SMASH_GOLD_EGGS_JACKPOT_ + jackpotSort;
   } else {
     jackpotTypeToStr = "必中";
     jackpotKey = Rkey.SMASH_GOLD_EGGS_NEXT_WIN_JACKPOT_ + jackpotSort;
   }

   logger.info("開(kāi)始生成{}獎(jiǎng)池{}。。。。。", jackpotTypeToStr, jackpotSort);
   Jedis jedis = RedisPool.getJedis();
   try {

     if (jedis.exists(jackpotKey)) {
       // 判斷獎(jiǎng)池中是否還有獎(jiǎng)品
       Long length = jedis.llen(jackpotKey);
       if (length <= 0) {
         // 獎(jiǎng)池空了，重新放入獎(jiǎng)品
         logger.info("{}獎(jiǎng)池{}空了，重新放入獎(jiǎng)品。。。。。", jackpotTypeToStr, jackpotSort);
         // 根據(jù)配置得到總的獎(jiǎng)品數(shù)量
         Integer totalCount = getAwardTotalCount(1);

         setSingleAwardToJackpot(awadList, jedis, jackpotKey, totalCount);
       }

     } else {
       // 直接生成獎(jiǎng)池
       logger.info("{}獎(jiǎng)池{}不存在，直接放入獎(jiǎng)品。。。。。", jackpotTypeToStr, jackpotSort);
       Integer totalCount = getAwardTotalCount(1);
       setSingleAwardToJackpot(awadList, jedis, jackpotKey, totalCount);
     }
   } finally {
     RedisPool.returnJedis(jedis);
   }
 }


 /**
 * 獲取獎(jiǎng)池獎(jiǎng)品數(shù)量
 *
 * @param type 獎(jiǎng)池類(lèi)型：1：普通獎(jiǎng)池 2：必中獎(jiǎng)池
 * @return
 */
 Integer getAwardTotalCount(Integer type) {
   List<BsGoldEggsConfig> goldEggsConfigList = goldEggsConfigMapper.queryAllList();
   if (goldEggsConfigList == null || goldEggsConfigList.size() < 4) {
     throw new BusiException(E.INVALID_REQUEST, "請(qǐng)先完成砸金蛋獎(jiǎng)品配置！");
   }
   Integer totalCount = 0;
   if (type == 1) {
     // 普通獎(jiǎng)池獎(jiǎng)品數(shù)量
     for (BsGoldEggsConfig goldEggsConfig : goldEggsConfigList) {
       totalCount += goldEggsConfig.getBaseWeight();
     }


   } else {
     // 必中獎(jiǎng)池?cái)?shù)量
     Jedis jedis = RedisPool.getJedis();
     try {
       String mustAwardLevel = jedis.hget(Rkey.SMASH_GOLD_EGGS_GLOBAL_CONFIG, "mustAwardLevel");
       if (StringUtils.isEmpty(mustAwardLevel)) {
         throw new BusiException(E.INVALID_REQUEST, "請(qǐng)先完成砸金蛋獎(jiǎng)品配置！");
       }
       for (int i = 0; i < Integer.valueOf(mustAwardLevel); i++) {
         totalCount += goldEggsConfigList.get(i).getWinWeight();
       }
     } finally {
       RedisPool.returnJedis(jedis);
     }


   }

   return totalCount;
 }

 /**
 * @param awadList
 * @param jedis
 * @param jackpotKey
 * @param totalCount 總的獎(jiǎng)品個(gè)數(shù) 比如一等獎(jiǎng)10個(gè)，二等獎(jiǎng)20個(gè)，三等獎(jiǎng)30,四等獎(jiǎng)40 則totalCount = 10+20+30+40=100
 */
 private void setSingleAwardToJackpot(List<String> awadList, Jedis jedis, String jackpotKey, Integer totalCount) {
   // 1.生成 100組 [1-100] 隨機(jī)數(shù) awadList
   for (int i = 0; i < 2; i++) {
     List<Integer> list = getOneToHundredNumber(totalCount);
     for (Integer j : list) {
       awadList.add(j.toString());
     }
   }

   // 2.awadList打亂放入redis(list) 這里打亂2次
   Collections.shuffle(awadList);
   Collections.shuffle(awadList);

   // 3.放入redis
   awadList.forEach(s -> jedis.lpush(jackpotKey, s));
   logger.info("獎(jiǎng)品info：預(yù)設(shè)值：{} 實(shí)際設(shè)置：{}", 10000, awadList.size());
 }

 /**
 * jdk8 得到包含1-end數(shù)字的list
 * end : 生成數(shù)字的個(gè)數(shù)
 *
 * @return
 */
 private List<Integer> getOneToHundredNumber(Integer end) {
   // 起始數(shù)字
   int start = 1;
   // 生成數(shù)字的個(gè)數(shù)
   // int end = 100;
   // 生成1,2,3,4,5...100
   List<Integer> list = Stream.iterate(start, item -> item + 1).limit(end).collect(Collectors.toList());
   return list;
 }

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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