1.Login界面
<%@page import="java.net.URLDecoder"%> <%@page import="jdk.nashorn.api.scripting.URLReader"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>Insert title here</title> </head> <body> <% //提取cookie保存的卡号 //获取所有cookie Cookie[]cks=request.getCookies(); String username=""; if(cks!=null){ //遍历 for(Cookie c:cks) { if(c.getName().equals("username")) { username = URLDecoder.decode(c.getValue()); } } } %> <form action="Check.jsp" method="post"> 用户名：<input type="text" name="user" value="<%=username %>"><br> 密码：<input type="password" name="password"><br> <input type="submit" value="登录"> </form> </body> </html>
2.检查登录界面
<%@page import="java.net.URLEncoder"%> <%@page import="com.haiqi.test.UserDAO"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>Insert title here</title> </head> <body> <% String username=request.getParameter("user");//获取的值是与form表单中的文本框的name对应 String password = request.getParameter("password"); //数据验证 if(username==null||password==null|| username.equals("")||password.equals("")) { //带缓存输出 out.write("请正确登录"); response.setHeader("refresh", "3;url=Login.jsp"); } else { //检查登录信息 UserDAO ud = new UserDAO(); username = new String(request.getParameter("user").getBytes("ISO-8859-1"),"UTF-8"); if(ud.CheckLogin(username, password)) { //用cookie记住用户名 Cookie cid = new Cookie("username",URLEncoder.encode(username)); cid.setMaxAge(10*24*60*60);//设置过期时间 response.addCookie(cid); //保持登录状态 session.setAttribute("username", username); response.sendRedirect("Main.jsp"); } else { out.write("登录失败！"); //跳回登录界面 response.setHeader("refresh", "2;URL=Login.jsp"); } } %> </body> </html>
3.主界面
<%@page import="com.haiqi.test.UserDAO"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>Insert title here</title> </head> <body> 淘宝首页<br> <% Object obj =session.getAttribute("username"); if(obj == null) { out.print("登录超时或未登录！"); response.setHeader("refresh", "3;url=Login.jsp"); } else { out.print(obj+",欢迎登录！"); } %> <br> <br>
<a href="Logout.jsp">退出登录</a> <form action="Main2.jsp" method="post"> 请输入你要购买的商品名称<input type="text" name="spname"><br> <input type="submit" value="加入购物车">
<a href="Login.jsp">退出登录</a> </body> </html>
4.退出界面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>Insert title here</title> </head> <body> <% //销毁session session.invalidate(); out.print("退出成功！"); response.setHeader("refresh", "2;url=login.jsp"); %> </body> </html>
5.UserDAO
package com.haiqi.test; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import com.mchange.v2.c3p0.ComboPooledDataSource; public class UserDAO { private ComboPooledDataSource cp = new ComboPooledDataSource("helloc3p0"); public boolean CheckLogin(String username,String password) { boolean rtn = false; try { Connection conn = cp.getConnection(); PreparedStatement ps = conn.prepareStatement("select * from account where a_name=?and a_password=?"); ps.setString(1, username); ps.setString(2, password); ResultSet rs = ps.executeQuery(); rtn=rs.next(); } catch (SQLException e) { e.printStackTrace(); } return rtn; } }
6.添加商品页面
<%@page import="java.net.URLEncoder"%> <%@page import="java.net.URLDecoder"%> <%@page import="jdk.nashorn.api.scripting.URLReader"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>Insert title here</title> </head> <% String spname=request.getParameter("spname"); if(spname!=null) { spname=new String(spname.getBytes("ISO-8859-1"),"UTF-8"); //设置cookie Cookie cok = new Cookie("spname", URLEncoder.encode(spname) );//利用cookie记住购物车内的物品 //设置cookie的生命周期 cok.setMaxAge(10*60*24); //发送cookie response.addCookie(cok); //跳转页面到菜单选择 response.sendRedirect("thing.jsp"); } %> <body> </body> </html>
7.购物车页面
<%@page import="java.net.URLDecoder"%> <%@page import="java.net.URLEncoder"%> <%@page import="jdk.nashorn.api.scripting.URLReader"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>Insert title here</title> </head> <body> <!-- EL表达式 --> <!--name=${param.name }; --> 添加到购物车的商品 <br> <% Cookie []ck = request.getCookies(); String spname=""; if(ck!=null){ for(Cookie c:ck) { //遍历 if(c.getName().equals("spname")) { spname=URLDecoder.decode(c.getValue()); } } out.write(spname); } else { out.write("购物车没添加商品！"); } %> <br> <a href="Main2.jsp">返回购物车</a> </body> </html>