基于session的购物车实现

package com.lilei.bean;

import java.io.Serializable;

public class Book implements Serializable {
	private static final long serialVersionUID = 1L;
	private String id;
	private String name;
	private double price;

	public Book（） {
	}

	public Book（String id String name double price） {
		this.id = id;
		this.name = name;
		this.price = price;
	}

	public String getId（） {
		return id;
	}

	public void setId（String id） {
		this.id = id;
	}

	public String getName（） {
		return name;
	}

	public void setName（String name） {
		this.name = name;
	}

	public double getPrice（） {
		return price;
	}

	public void setPrice（double price） {
		this.price = price;
	}

	@Override
	public String toString（） {
		return name + “   “ + price + “   “;
	}	
	

}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-04-29 15:22  实验8
     目录           0  2018-04-29 15:22  实验8Shopping
     文件      955728  2018-04-29 13:51  实验8Shopping.war
     目录           0  2018-04-29 15:22  实验8Shopping.idea
     目录           0  2018-04-29 15:22  实验8Shopping.ideaartifacts
     文件         389  2018-04-29 00:40  实验8Shopping.ideaartifactsShopping_war.xml
     文件         507  2018-04-27 15:57  实验8Shopping.ideaartifactsShopping_war_exploded.xml
     文件         170  2018-04-27 15:57  实验8Shopping.ideacompiler.xml
     目录           0  2018-04-27 15:59  实验8Shopping.ideainspectionProfiles
     目录           0  2018-04-29 15:22  实验8Shopping.idealibraries
     文件         218  2018-04-27 16:24  实验8Shopping.idealibrariesjstl.xml
     文件         232  2018-04-27 16:05  实验8Shopping.idealibrariesservlet_api.xml
     文件         226  2018-04-27 16:24  实验8Shopping.idealibrariesstandard.xml
     文件         273  2018-04-27 15:57  实验8Shopping.ideamisc.xml
     文件         256  2018-04-27 15:57  实验8Shopping.ideamodules.xml
     文件       50693  2018-04-29 15:19  实验8Shopping.ideaworkspace.xml
     文件        1504  2018-04-29 00:38  实验8ShoppingShopping.iml
     目录           0  2018-04-29 15:22  实验8Shoppingsrc
     目录           0  2018-04-29 15:22  实验8Shoppingsrccom
     目录           0  2018-04-29 15:22  实验8Shoppingsrccomlilei
     目录           0  2018-04-29 15:22  实验8Shoppingsrccomlileiean
     文件         800  2018-04-27 14:24  实验8ShoppingsrccomlileieanBook.java
     文件        1028  2018-04-28 20:27  实验8ShoppingsrccomlileieanShopCart.java
     文件         381  2018-04-27 14:23  实验8ShoppingsrccomlileieanUser.java
     目录           0  2018-04-29 15:22  实验8Shoppingsrccomlileidao
     文件         691  2018-04-27 16:02  实验8ShoppingsrccomlileidaoBookDB.java
     目录           0  2018-04-29 15:22  实验8Shoppingsrccomlileifilter
     文件        2977  2018-04-27 14:30  实验8ShoppingsrccomlileifilterEncodingFilter.java
     文件         993  2018-04-29 15:07  实验8ShoppingsrccomlileifilterLoginFilter.java
     目录           0  2018-04-29 15:22  实验8Shoppingsrccomlileiservlet
     文件        3592  2018-04-29 00:10  实验8ShoppingsrccomlileiservletCartServlet.java
............此处省略61个文件信息