Java秒杀系统（十二）秒杀功能实现-订单详情页

import java.util.Date;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import cn.tedu.miaosha.dao.OrderDao;
import cn.tedu.miaosha.domain.MiaoshaOrder;
import cn.tedu.miaosha.domain.MiaoshaUser;
import cn.tedu.miaosha.domain.OrderInfo;
import cn.tedu.miaosha.vo.GoodsVo;

@Service
public class OrderService {
	//判断秒杀
	@Autowired
	OrderDao orderDao;
	
	public MiaoshaOrder getMiaoshaOrderByUserIdGoodsId(long userId, long goodsId) {
		return orderDao.getMiaoshaOrderByUserIdGoodsId(userId, goodsId);
	}

	@Transactional
	public OrderInfo createOrder(MiaoshaUser user, GoodsVo goods) {
		OrderInfo orderInfo = new OrderInfo();
		orderInfo.setCreateDate(new Date());
		orderInfo.setDeliveryAddrId(0L);
		orderInfo.setGoodsCount(1);
		orderInfo.setGoodsId(goods.getId());
		orderInfo.setGoodsName(goods.getGoodsName());
		orderInfo.setGoodsPrice(goods.getMiaoshaPrice());
		orderInfo.setOrderChannel(1);
		orderInfo.setStatus(0);
		orderInfo.setUserId(user.getId());
		long orderId = orderDao.insert(orderInfo);
		MiaoshaOrder miaoshaOrder = new MiaoshaOrder();
		miaoshaOrder.setGoodsId(goods.getId());
		miaoshaOrder.setOrderId(orderId);
		miaoshaOrder.setUserId(user.getId());
		orderDao.insertMiaoshaOrder(miaoshaOrder);
		return orderInfo;
	}
	
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import cn.tedu.miaosha.domain.MiaoshaOrder;
import cn.tedu.miaosha.domain.MiaoshaUser;
import cn.tedu.miaosha.domain.OrderInfo;
import cn.tedu.miaosha.redis.RedisService;
import cn.tedu.miaosha.result.CodeMsg;
import cn.tedu.miaosha.service.GoodsService;
import cn.tedu.miaosha.service.MiaoshaService;
import cn.tedu.miaosha.service.MiaoshaUserService;
import cn.tedu.miaosha.service.OrderService;
import cn.tedu.miaosha.vo.GoodsVo;

@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) {//用户为空
    		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";
    }

import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.SelectKey;

import cn.tedu.miaosha.domain.MiaoshaOrder;
import cn.tedu.miaosha.domain.OrderInfo;

@Mapper
public interface OrderDao {
	
	@Select("select * from miaosha_order where user_id=#{userId} and goods_id=#{goodsId}")
	public MiaoshaOrder getMiaoshaOrderByUserIdGoodsId(@Param("userId")long userId, @Param("goodsId")long goodsId);

	@Insert("insert into order_info(user_id, goods_id, goods_name, goods_count, goods_price, order_channel, status, create_date)values("
			+ "#{userId}, #{goodsId}, #{goodsName}, #{goodsCount}, #{goodsPrice}, #{orderChannel},#{status},#{createDate} )")
	@SelectKey(keyColumn="id", keyProperty="id", resultType=long.class, before=false, statement="select last_insert_id()")
	public long insert(OrderInfo orderInfo);
	
	@Insert("insert into miaosha_order (user_id, goods_id, order_id)values(#{userId}, #{goodsId}, #{orderId})")
	public int insertMiaoshaOrder(MiaoshaOrder miaoshaOrder);

	
}