补充:
实际项目中的主键不能用自增id,我们可以用snowflake算法。
参考:http://mp.weixin.qq.com/s/bIkdcYo32yTEOGn0t8ABeg
核心代码:
@Controller @RequestMapping("/miaosha") public class MiaoshaController { @Autowired MiaoshaUserService userService; @Autowired RedisService redisService; @Autowired GoodsService goodsService; @Autowired OrderService orderService; @Autowired MiaoshaService miaoshaService; @RequestMapping("/do_miaosha") public String list(Model model,MiaoshaUser user, @RequestParam("goodsId")long goodsId) { model.addAttribute("user", user); if(user == null) { return "login"; } //判断库存 GoodsVo goods = goodsService.getGoodsVoByGoodsId(goodsId); int stock = goods.getStockCount(); if(stock <= 0) { model.addAttribute("errmsg", CodeMsg.MIAO_SHA_OVER.getMsg()); return "miaosha_fail"; } //判断是否已经秒杀到了 MiaoshaOrder order = orderService.getMiaoshaOrderByUserIdGoodsId(user.getId(), goodsId); if(order != null) { model.addAttribute("errmsg", CodeMsg.REPEATE_MIAOSHA.getMsg()); return "miaosha_fail"; } //减库存 下订单 写入秒杀订单 OrderInfo orderInfo = miaoshaService.miaosha(user, goods); model.addAttribute("orderInfo", orderInfo); model.addAttribute("goods", goods); return "order_detail"; } }