常规一个商品一个订单

多个商品一个订单

订单只有提交才能结算

付款页面

代码实现，主要是Servlet代码和Service业务层的代码，此处业务层，对多个dao的操作更为明显，体现业务二字！！！

package com.cart.web;

import java.io.IOException;
import java.util.Date;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.cart.entity.Order;
import com.cart.entity.Userinfo;
import com.cart.service.OrderService;

public class OrderServlet extends HttpServlet {
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		//1.业务，将购物车中的数据删除，同时增加数据进订单表和订单详情表;
		String[]bids=req.getParameterValues("bid");
		StringBuilder sbbid=new StringBuilder();
		for(String bid:bids){
			sbbid.append(bid+",");
		}
		
		String sbid=sbbid.substring(0,sbbid.length()-1);
		
		//已经获取了你复选框的订单，到商品id数组中，此处是bids(大家可以是pids/gids等)
		OrderService orderService=new OrderService();
		
		Order order=new Order();
		Userinfo user=(Userinfo)req.getSession().getAttribute("userinfo");
		order.setUserid(user.getId());
		order.setContactphone(user.getPhone());
		order.setCreatetime(new Date());
		order.setTotal(Double.parseDouble(req.getParameter("total")));
		order.setShipaddress(user.getAddress());
		order.setStatus("未发货");
		
		//orderService.insertOrder(order); //保存订单;
		//让service继续去执行保存订单的操作；
		
		orderService.delCartAndSaveOrder(sbid,user,order);
	}
	
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		this.doGet(req, resp);
	}
}

package com.cart.service;

import java.sql.*;
import com.cart.dao.*;
import com.cart.dao.impl.*;
import com.cart.entity.Order;
import com.cart.entity.Userinfo;
import com.cart.util.DaoFactory;

public class OrderService {
	//1.定义属性：对dao进行操作;
	OrderDao orderDao=new OrderDaoImpl();
	CartDao cartDao=new CartDaoImpl();
	//2.对订单,进行增删该查
	public void delCartAndSaveOrder(String sbid,Userinfo user,Order order){
		//使用事务操作，业务层可以这样操作，对不同的dao操作；
		Connection con=null;
		PreparedStatement pstmt=null;
		try{
			StringBuilder sbSql=new StringBuilder();
			sbSql.append("delete from cartitem where uid=? and bid in(");
			sbSql.append(sbid);
			sbSql.append(")");
			String sql=sbSql.toString();
			
			con=DaoFactory.getConnection();
			pstmt=con.prepareStatement(sql);
			con.setAutoCommit(false);//设置自动提交事务，为false
			orderDao.insertOrder(order);//调用插入订单方法；，同时删除原来的购物车数据方法；
			Object[] params={user.getId()};
			DaoFactory.setParams(pstmt, params);
			DaoFactory.executeUpdate(sql, params);
			
			//System.out.println(sbSql);
			
			con.commit();
			
		}catch(Exception e){
			e.printStackTrace();
		}finally{
			DaoFactory.closeAll(null, null, con);
		}
	}
	public int insertOrder(Order order){
		//ct.deletecartItem(uid, bid);
		return orderDao.insertOrder(order);
	}
	public int updateOrder(int id){
		return orderDao.updateOrder(id);
	}
	public int deleteOrder(int id){
		return orderDao.deleteOrder(id);
	}
	
	public Order findOrderById(int id){
		return orderDao.findOrderById(id);
	}
}