Java商城订单设计

/**
 * 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 generateOrderSn(OmsOrder order) {
    StringBuilder sb = new StringBuilder();
    String date = new SimpleDateFormat("yyyyMMdd").format(new Date());
    String key = REDIS_DATABASE+":"+ REDIS_KEY_ORDER_ID + date;
    Long increment = redisService.incr(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();
}