概率抽奖

// 概率抽奖：prizeList为奖品列表，，每一个奖品有一个概率值
PrizeDO prize = null;
if(!CollectionUtils.isEmpty(prizeList)){
    double value = new Random().nextDouble() * 100 ;
    log.info("概率值，value={}",value);
    double compareValue = 0d;
    for (ActivityPrizeDO prizeDO : prizeList) {
        compareValue += prizeDO.getProbability();
        if(value <= compareValue){
            prize = prizeDO;
            break;
        }
    };
}
return prize;

原文：https://www.cnblogs.com/maohuidong/p/15303336.html