购物车JSP代码
发布时间：2025-12-09 19:18:55
浏览次数：4
用jsp实现一个简单的购物车web应用系统。实现的添加购物商品，删除购物商品并且显示购物车信息。
1. 在自己建立的WEB工程中,建立包shopcart.dto,在相应的包中添加类Product.java ,ShopCart.java
/*类Product */ package shopcart.dto; import java.io.Serializable; public class Product implements Serializable { private String id;//产品标识 private String name;//产品名称 private String description;//产品描述 private double price;//产品价格 public Product() { } public Product(String id, String name, String description, double price) { this.id = id; this.name = name; this.description = description; this.price = price; } public void setId(String id) { this.id = id; } public void setName(String name) { this.name = name; } public void setDescription(String description) { this.description = description; } public void setPrice(double price) { this.price = price; } public String getId() { return id; } public String getName() { return name; } public String getDescription() { return description; } public double getPrice() { return price; } } /*类ShopCart */ package shopcart.dto; import java.io.Serializable; import java.util.*; public class ShopCart implements Serializable { public ShopCart() { } private List cart = null; /** * 添加一个产品到购物车 * @param product Product */ public void addProductToCart(Product product) { if (cart == null) cart = new ArrayList(); Iterator it = cart.iterator(); while (it.hasNext()) { Product item = (Product) it.next(); if (item.getId().equals(product.getId())) { return; } } cart.add(product); } /** * 从购物车中删除一产品 * @param productId String 产品id */ public void removeProductFromCart(String productId) { if (cart == null) return; Iterator it = cart.iterator(); while (it.hasNext()) { Product item = (Product) it.next(); if (item.getId().equals(productId)) { it.remove(); return; } } } /** * 计算购物车中的商品价格 * @return double 商品价格总数 */ public double getAllProductPrice() { if (cart == null) return 0; double totalPrice = 0; Iterator it = cart.iterator(); while (it.hasNext()) { Product item = (Product) it.next(); totalPrice += item.getPrice(); } return totalPrice; } /** * 返回购物车所有产品信息 * @return List */ public List getAllProductsFromCart() { return cart; } } 2.在WebRoot目录下添加包shopCart 在里边添加ShowProductsJSP.jsp ShoppingJSP.jsp ShopCartJSP.jsp
ShowProductsJSP.jsp :::::::::
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%> <%@ page import="shopcart.dto.*"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'ShowProductsJSP.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body bgcolor="#ffffff"> <% Map products = new HashMap(); products.put("001", new Product("001", "mp3播放器", "效果很不错的mp3播放器，存储空间达1GB", 999.00)); products.put("002", new Product("002", "数码相机", "象素500万，10倍光学变焦", 2500.00)); products.put("003", new Product("003", "数码摄像机", "120万象素，支持夜景拍摄，20倍光学变焦", 5999.00)); products.put("004", new Product("004", "迷你mp4", "市面所能见到的最好的mp4播放器，国产", 1999.99)); products.put("005", new Product("005", "多功能手机", "集mp3播放、100万象素数码相机，手机功能于一体", 2199.99)); ServletContext context = getServletContext(); context.setAttribute("products", products); %> <H1> 产品显示 </H1> <a href="/helloApp/shopCart/ShowCartJSP.jsp">查看购物车</a> <form name="productForm" action="/helloApp/shopCart/ShoppingJSP.jsp" method="POST"> <input type="hidden" name="action" value="purchase"> <table border="1" cellspacing="0"> <tr bgcolor="#CCCCCC"> <tr bgcolor="#CCCCCC"> <td> 序号 </td> <td> 产品名称 </td> <td> 产品描述 </td> <td> 产品价格（￥） </td> <td> 添加到购物车 </td> </tr> <% Set productIdSet = products.keySet(); Iterator it = productIdSet.iterator(); int number = 1; while (it.hasNext()) { String id = (String) it.next(); Product product = (Product) products.get(id); %><tr> <td> <%=number++ %></td> <td> <%=product.getName()%> </td> <td><%=product.getDescription() %> </td> <td> <%=product.getPrice() %></td> <td> <input type="checkbox" name="productId" value="<%=product.getId() %>"> </td> </tr> <% }%> </table> <p> <input type="reset" value="全部取消" /> <input type="submit" value="确定" /> </p> </form> </body> </html> ShoppingJSP.jsp::::::::::
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%> <%@ page import="shopcart.dto.*"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'shopping.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body bgcolor="#ffffff"> <% try{ response.setContentType("text/html; charset=GBK"); HttpSession mysession = request.getSession(); ServletContext context = getServletContext(); ShopCart cart = (ShopCart) mysession.getAttribute("shopCart"); String action = request.getParameter("action"); if ("remove".equals(action)) { String removeId = request.getParameter("removeId"); cart.removeProductFromCart(removeId); } else if(action.equals("purchase")){ String[] productIds = request.getParameterValues("productId"); Map products = (Map) context.getAttribute("products"); if (cart == null) { cart = new ShopCart(); mysession.setAttribute("shopCart", cart); } if (productIds == null) { productIds = new String[0]; } for (int i = 0; i < productIds.length; i++) { Product product = (Product) products.get(productIds[i]); cart.addProductToCart(product); } } }catch(NullPointerException e) {e.printStackTrace();} %> <jsp:forward page="/shopCart/ShowCartJSP.jsp"></jsp:forward> </body> </html> ShopCartJSP.jsp:::::::::
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%> <%@ page import="shopcart.dto.*" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'ShowCartJSP.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body><% HttpSession mysession = request.getSession(); ShopCart cart = (ShopCart) mysession.getAttribute("shopCart"); List products = null; if (cart == null || (products = cart.getAllProductsFromCart()) == null) { %> <h1> 你目前没有购买任何产品 </h1> <p> <a href="/shopCart/ShowProductsJSP.jsp">返回产品显示页</a> </p> <% } else { Iterator iterator = products.iterator(); %> <h1> 你目前购买的产品为： </h1> <table border="1" cellspace="0"> <tr bgcolor="#CCCCCC"> <td> 产品名称 </td> <td> 产品描述 </td> <td> 价格 </td> <td> 操作 </td> </tr> <% while (iterator.hasNext()) { Product productItem = (Product) iterator.next(); %> <tr> <td> <%=productItem.getName()%> </td> <td><%=productItem.getDescription()%> </td> <td> <%=productItem.getPrice()%></td> <td> <a href="/helloApp/shopCart/ShoppingJSP.jsp?action=remove&removeId=<%=productItem.getId()%>">删除</a> </td> </tr> <% } %> </table> <p> 目前您购物车的总价格为：<%=cart.getAllProductPrice()%> 元人民币。 </p> <p> </br> <a href="/helloApp/shopCart/ShowProductsJSP.jsp">返回产品显示页</a> </p> <% } %> </body> </html> 3.最后打开Tomcat,在浏览器URL中输入http://localhost:8088/helloApp/shopCart/ShowProductsJSP.jsp即可!
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