cart.java

购物系统~含其他会员下载一次您上载的源码

package com.beans;
import java.util.*;
import java.sql.*;

import com.utils.DBConnection;

public class Cart implements java.io.Serializable
{
	private String login=null;		//用户的标识
	private String pass=null;		//用户密码
	private String name=null;		//用户姓名
	private HashMap items=null;		//购物车中的物品
	private float totalPrice = 0;	//总价(新加入)
	private int orderId = 0;			//订单号(新加入)
	
	public float getTotalPrice()//(新加入)
	{
		return this.totalPrice;
	}
	
	public int getOrderId()//(新加入)
	{
		return this.orderId;
	}
	
	public Cart()
	{
		items=new HashMap();
	}
	
	public void saveOrder(Products products) throws Exception	//生成并保存订单
	{															
		Connection con = null;
	    try
	    {
			con = DBConnection.getConnection();
		}
		catch(Exception e)
		{
			//e.printStackTrace();
			throw e;
		}
		
		Set book = items.keySet();			//获取HashMap表的名即书号
		Iterator it = book.iterator();
		
		try
		{
			if(it.hasNext())
			{	//如果有书调用存储过程生成订单获取订单号
				CallableStatement cstmt=con.prepareCall("{call saveOrder(?,?)}");
				cstmt.setString(1,login);
				cstmt.registerOutParameter(2,java.sql.Types.INTEGER);
				try 
				{
					cstmt.execute();
					orderId = cstmt.getInt(2);
				} 
				catch(Exception e) 
				{
					//e.printStackTrace();
					throw e;
				}
				cstmt.close();
			}
			else
			{
				throw new Exception();
			}
			
			float price = 0;
			while(it.hasNext())		//将书号和订单号等信息
			{
				String itemId = (String)it.next();
				price = products.getItem(itemId).getPrice();
				int number = ((Integer)items.get(itemId)).intValue();
				this.writeDatabase(con,orderId,itemId,number,price);	//保存订单明细
				totalPrice += price*number;	//计算总价格
			}
			//将总价格和时间等的信息存入订单表中
			PreparedStatement stm=con.prepareStatement("update Orders set totalPrice = ?,time = ? where orderId = ?");
			stm.setFloat(1,totalPrice);
			long date = new java.util.Date().getTime();
			stm.setTimestamp(2,new Timestamp(date));
			stm.setInt(3,orderId);
			try 
			{
				stm.execute();
			} 
			catch(Exception e) 
			{
				//e.printStackTrace();
				throw e;
			}
			stm.close();
			
			con.close();
		}
		catch(Exception e)
		{
			//e.printStackTrace();
			throw e;
		}
	}
	
	public void writeDatabase(Connection con,int orderId,String itemId,int number,float price) throws Exception
	{			//保存订单明细，由saveOrder()调用
		try
		{
			PreparedStatement stm=con.prepareStatement("insert into OrderDetails values(?,?,?,?)");
			stm.setInt(1,orderId);
			stm.setString(2,itemId);
			stm.setInt(3,number);
			stm.setFloat(4,price);
			try 
			{
				stm.execute();
			} 
			catch(Exception e) 
			{
				//e.printStackTrace();
				throw e;
			}
			stm.close();
		}
		catch(Exception e)
		{
			//e.printStackTrace();
			throw e;
		}
	}
	
	public void addItem(String itemId,int quantity)	//(修改过的方法)
	{
		if(items.containsKey(itemId))
		{
			int number = ((Integer)items.get(itemId)).intValue();	//获取原来的数量
			items.put(itemId,new Integer(number+quantity));
		}
		else
		{
			items.put(itemId,new Integer(quantity));	
		}
	}
	
	public void removeItem(String itemId)
	{
		items.remove(itemId);
	}
	
	public void updateItem(String itemId,int quantity)
	{
		if(items.containsKey(itemId))items.remove(itemId);
		items.put(itemId,new Integer(quantity));
	}
	
	public HashMap getItems()
	{
		return this.items;
	}
	
	public void setLogin(String login)
	{
		this.login=login;
	}
	
	public String getLogin()
	{
		return this.login;
	}
	
	public void setPass(String pass)
	{
		this.pass=pass;
	}
	
	public String getPass()
	{
		return this.pass;
	}
	
	public String getName()
	{
		return this.name;
	}
	
	public void clear()		//(修改过)
	{
		items.clear();
		this.totalPrice = 0;
		this.orderId = 0;
	}
	
	public void iniLogin() throws Exception		//(新方法)用户验证，如果不成功抛出异常
	{
		Connection con = null;
		Statement stm = null;
		ResultSet result = null;
		
		try
	    {
			con = DBConnection.getConnection();
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		
		try
		{
			stm=con.createStatement();
			result=stm.executeQuery("select * from regInfo where login='"+login+"' and pass='"+pass+"'");		

			if(result.next())
			{
				this.name=result.getString("name");
			}
			else
			{
				throw new Exception();	//连接不成功抛出异常
			}
			
		}
		catch(Exception e)
		{
			//e.printStackTrace();
			throw e;
		}
		finally
		{
			try
			{
				result.close();
				stm.close();
			
				con.close();
			}
			catch(Exception e)
			{
				
			}
		}
	}
}