18为订单编号

/**
     * 生成18位订单编号:8位日期+2位平台号码+2位支付方式+6位以上自增id
     */
    private String OrderSn(OmsOrder order) {
        StringBuilder sb = new StringBuilder();
        String date = new SimpleDateFormat("yyyyMMdd").format(new Date());
        String key = REDIS_KEY_PREFIX_ORDER_ID + date;
        Long increment = redisService.increment(key, 1);
        sb.append(date);
        sb.append(String.format("%02d", order.getSourceType()));
        sb.append(String.format("%02d", order.getPayType()));
        String incrementStr = increment.toString();
        if (incrementStr.length() <= 6) {
            sb.append(String.format("%06d", increment));
        } else {
            sb.append(incrementStr);
        }
        return sb.toString();
    }