YouChain链上发牌demo 洗牌算法

shuffleBySeed

public static Integer[] shuffleBySeed(String shuffleSeed) {
    //将一副新牌映射为1-54的数组
    Integer[] newCardsArray = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54};
    List<Integer> newCardsList = Arrays.asList(array);

    //引入自定义种子
    SecureRandom random =  SecureRandom.getInstance("SHA1PRNG");
    random.setSeed(shuffleSeed.getBytes());

    //洗牌
    Collections.shuffle(newCardsList, random);
    return (Integer[])list.toArray();
}