JSP实现的简单购物车，JSP实现简单购物车,goods_form.h
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JSP实现的简单购物车，JSP实现简单购物车,goods_form.h
goods_form.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>欢迎光临购物车</title><style type="text/css">h1 { color: #F66;}</style></head><body><div align="center"> <h1> 欢迎光临购物车 </h1> <form name="form1" method="post" action="goods_do.jsp" target=""> <table width="80%" border="0"> <tr> <td width="50%" height="30" align="right"> 请选择您要购买的商品： </td> <td width="50%" height="30" align="left">&nbsp; <select name="GoodsName"> <option value="电脑" selected> 电脑 </option> <option value="MP3"> MP3 </option> <option value="MP4"> MP4 </option> <option value="MP5"> MP5 </option> <option value="洗衣机"> 洗衣机 </option> <option value="电视机"> 电视机 </option> </select></td> </tr> <tr> <td width="50%" height="30" align="right"> 购买数量： </td> <td width="50%" height="30" align="left">&nbsp; <input type="text" name="GoodsNumber" value="1" size="5"></td> </tr> </table> <p> <input type="submit" name="sub" value="提交"> &nbsp;&nbsp; <input type="reset" name="res" value="重购"> </p> </form></div></body></html>goods_do.jsp
<%@ page contentType="text/html; charset=utf-8" language="java"%><%@ page import="java.util.*"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>欢迎光临购物车</title> <jsp:useBean id="Goods" scope="session" class="com.demo.Goods" /> <style type="text/css">td { color: #333; font-family: "微软雅黑", Verdana, sans-serif, "宋体"; width: 150px; border-bottom-width: 1px; border-bottom-style: dashed; border-bottom-color: #999;}table { width: 400px; text-align: center; margin-right: auto; margin-left: auto; border: 2px solid #666;}h1 { color: #F66;}</style> </head> <% //设置编码格式 request.setCharacterEncoding("utf-8"); //获取所要添加到购物车的商品名称和数量 String sGoodsName = request.getParameter("GoodsName"); String sGoodsNumber = request.getParameter("GoodsNumber"); //根据商品名称是否为空判断是否需要保存商品信息 if (sGoodsName != null && sGoodsName != "") { int iGoodsNumber = Integer.parseInt(sGoodsNumber); Goods.add(sGoodsName, iGoodsNumber); } //获取购物车对象信息 Hashtable h = Goods.show(); //获取购物车中所有商品名称 Enumeration e = h.keys(); //keys(),返回此哈希表中的键的枚举。 %> <body> <div align="center"> <h1> 欢迎光临购物车 </h1> <p> 您的购物信息如下： </p> <table> <% while (e.hasMoreElements()) { //根据商品名称获得相应商品数量 String sTemp = e.nextElement().toString(); int iTemp = ((Integer) h.get(sTemp)).intValue(); %> <tr> <td><%=sTemp%>: </td> <td><%=iTemp%></td> <td> <br> <form action="goods_delete.jsp" method="post"> <input name="deleteName" type="hidden" value="<%=sTemp%>"> <input name="delete" type="submit" value="移除"> </form> </td> </tr> <% } %> </table> <p> <input type="button" name="goon" value="继续购物" onClick="javascript:window.location='goods_form.html'"> </p> </div> </body></html>goods_delete.jsp
<%@ page contentType="text/html; charset=utf-8" language="java"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>欢迎光临购物车</title> <jsp:useBean id="Goods" scope="session" class="com.demo.Goods" /> </head> <body> <div align="center"> <h1> 欢迎光临购物车 </h1> <% request.setCharacterEncoding("utf-8"); //获取所要删除的商品名称 String sGoodsName = request.getParameter("deleteName"); //删除对应的商品信息 Goods.delete(sGoodsName); //跳转当前页面 response.sendRedirect("goods_do.jsp"); %> </div> </body></html>Goods.java
package com.demo;import java.util.*;import java.io.*;/** * 购物车 * */public class Goods implements Serializable { public Hashtable Goods = new Hashtable(); // 构造函数 public void Goods() { } // 将某个商品信息加入购物车 public void add(String GoodsName, int GoodsNumber) { if (Goods.containsKey(GoodsName)) // containsKey,测试指定对象是否为此哈希表中的键。 {// 购物车中存在此商品 int iTemp = ((Integer) Goods.get(GoodsName)).intValue(); // intValue(),以 int 类型返回该 Integer 的值。 iTemp = iTemp + GoodsNumber; Goods.put(GoodsName, new Integer(iTemp)); } else {// 购物车中不存在此商品 Goods.put(GoodsName, new Integer(GoodsNumber)); } } // 获取购物车中所有商品 public Hashtable show() { return Goods; } // 从购物车中删除一件商品 public void delete(String GoodsName) { int num = Integer.parseInt(Goods.get(GoodsName).toString()) - 1; if (num == 0) { Goods.remove(GoodsName); } else { Goods.put(GoodsName, num); } }}
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