创建Cookie，简单模拟登录，记录登录名，购物车记录先前添加内容，session控制登录
工作任务：模拟淘宝登录和购物车功能：使用cookie记录登录名，下次登录时能够记得上次的登录名，使用cookie模拟购物车功能，使用session记住登录信息并验证是否登录，防止利用url打开网站，并实现退出登录功能
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <% 11 String username = null; 12 Cookie[] ck = request.getCookies(); //获取cookie集合 13 for(Cookie temp:ck){ 14 if(temp.getName().equals("username")){ 15 username = temp.getValue(); 16 } 17 } 18 %> 19 <form action="Check001.jsp" method="post"> 20 卡号：<input type="text" name="username" value="<% if(username != null)out.print(username);%>"><br> 21 密码：<input type="password" name="password"><br> 22 <input type="submit" value="登录"> 23 </form> 24 </body> 25 </html>
1 <%@page import="com.hq.test.CarDao"%> 2 <%@ page language="java" contentType="text/html; charset=UTF-8" 3 pageEncoding="UTF-8"%> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 8 <title>Insert title here</title> 9 </head> 10 <body> 11 <% 12 String username = request.getParameter("username"); 13 String password = request.getParameter("password"); 14 if(username == null || password == null || username.equals("") || password.equals("")){ 15 out.write("请正确登录！"); 16 response.setHeader("refresh", "2;url=Login001.jsp"); 17 }else{ 18 //检查登录信息 19 CarDao cd = new CarDao(); 20 if(cd.checkLogin(username, password)){ 21 out.write("登录成功！"); 22 session.setAttribute("username",username); 23 session.setMaxInactiveInterval(10); 24 Cookie ck = new Cookie("username",username); 25 ck.setMaxAge(10*24*60*60); 26 response.addCookie(ck); 27 }else{ 28 out.write("登录失败！"); 29 response.setHeader("refresh", "2;url=Login001.jsp"); 30 } 31 } 32 %> 33 <form action="ShopCar.jsp" method="post"> 34 购物车：<input type="text" name="shop" ><br> 35 <input type="submit" value="加入购物车"> 36 </form> 37 </body> 38 </html>
1 <%@page import="java.net.URLDecoder"%> 2 <%@page import="java.net.URLEncoder"%> 3 <%@ page language="java" contentType="text/html; charset=UTF-8" 4 pageEncoding="UTF-8"%> 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 6 <html> 7 <head> 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 9 <title>Insert title here</title> 10 </head> 11 <body> 12 <% 13 String shop =request.getParameter("shop"); 14 String shopcar= null; 15 Cookie[] cks = request.getCookies(); //获取cookie集合 16 for(Cookie temp:cks){ 17 if(temp.getName().equals("shop")){ 18 shopcar=URLDecoder.decode(temp.getValue())+" "+shop; 19 } 20 } 21 Cookie ck = new Cookie("shop",URLEncoder.encode(shopcar)); 22 ck.setMaxAge(10*24*60*60); 23 response.addCookie(ck); 24 %> 25 <%=shopcar %> 26 </body> 27 </html>
