ThreadLocalRandom生成随机数

   public static String generateOrderNo(String type, String spgId, String date) {
        StringBuffer sb = new StringBuffer();
        sb.append(type);
        sb.append(spgId);
        sb.append(date);
        ThreadLocalRandom.current().ints(0,9).limit(10).forEach(sb::append);
        return sb.toString();
    }