用户表： uid (主键，自动增长) uname upwd
使用分层实现注册。（必做）
使用分层实现登录。（选做）
1.Stu.java
package com.bean; public class Stu { private int sid; private String uname; private String upwd; public int getSid() { return sid; } public void setSid(int sid) { this.sid = sid; } public String getUname() { return uname; } public void setUname(String name) { this.uname = uname; } public String getUpwd() { return upwd; } public void setUpwd(String upwd) { this.upwd = upwd; } public Stu(int sid, String name, String upwd) { super(); this.sid = sid; this.uname =uname; this.upwd = upwd; } public Stu() { super(); } }
2.StuDao.java
package com.dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import com.bean.Stu; public class StuDao { //学生数据访问类 //添加学生 public int addStu(Stu s){ int i=0; try { //加载驱动 Class.forName("com.mysql.jdbc.Driver"); //建立连接 Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql", "root", "root"); //写SQL语句 String sql="insert into stu values(?,?,?)"; //执行 PreparedStatement ps=con.prepareStatement(sql); ps.setInt(1, s.getSid()); ps.setString(2, s.getUname()); ps.setString(3, s.getUpwd()); i=ps.executeUpdate(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return i; } //登录 public int dlStu(Stu s){ int i=0; ResultSet rs =null; try { //加载驱动 Class.forName("com.mysql.jdbc.Driver"); //建立连接 Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql", "root", "root"); //写SQL语句 String sql="select uname,upwd from stu where uname=? and upwd=?"; //执行 PreparedStatement ps=con.prepareStatement(sql); ps.setInt(1, s.getSid()); ps.setString(2, s.getUname()); ps.setString(3, s.getUpwd()); i=ps.executeUpdate(); if(rs.next()){ System.out.print("用户登录成功"); i=1; }else{ System.out.print("用户登录失败"); i=0; } rs.close(); ps.close(); con.close(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return i; } }
3.登录界面index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.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>
<form name="control.jsp" method="post" action="" >
<table>
<tr>
<td>编号：</td>
<td><input type="text" name="sid" id="userNmae"></td>
</tr>
<tr>
<td>用户名：</td>
<td><input type="text" name="uname" id="userNmae"></td>
</tr>
<tr>
<td>输入密码：</td>
<td><input type="password" name="upwd" id="pwd"></td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="submit" value="登录"> <button type="button" name="button2" value="注册" onClick="zhuce.jsp">注册</button>
</td>
</tr>
</table>
</form>
</body>
</html>
4.注册界面zhuce.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'zhuce.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>
<form name="zccontrol.jsp" method="post" >
<table>
<tr>
<td>用户名：</td>
<td><input type="text" name="uname" id="userNmae"></td>
</tr>
<tr>
<td>输入密码：</td>
<td><input type="text" name="upwd" id="pwd"></td>
</tr>
<tr>
<td>请再次确认密码：</td>
<td><input type="text" name="upwd" id="userNmae"></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="注册"></td>
</tr>
</table>
</form>
</body>
</html>
5.登陆成功dlcg.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% 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 'zccg.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> <% String s1 = (String) session.getAttribute("sid"); String s2 = (String) session.getAttribute("uname"); String s3 = (String) session.getAttribute("upwd"); %> <div align="center"> <h1>WECLOME</h1> <h1>欢迎登录</h1> 你输入的登录信息 <table> <tr> <td>编号:</td> <td> <h2> <span><%=s1%></span> </h2> </td> </tr> <tr> <td>用户名:</td> <td> <h2> <span><%=s2%></span> </h2> </td> </tr> <tr> <td>密码:</td> <td><%=s3%></td> </tr> </table> </div> </body> </html>
6.注册成功zhuce.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% 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 'zccg.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> <h1>注册成功</h1> <button type="button" name="button1" value="退出" onClick="index.jsp">返回登录</button> </body> </html>
7.control.jsp
<%@page import="com.dao.StuDao"%> <%@page import="com.bean.Stu"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% Stu s = new Stu(); int sid = Integer.parseInt(request.getParameter("sid")); s.setSid(sid); String uname = request.getParameter("uname"); s.setUname(uname); String upwd = request.getParameter("upwd"); s.setUpwd(upwd); StuDao sd = new StuDao(); if (sd.dlStu(s) > 0) { //跳转登录成功页面 session.setAttribute("id",sid); session.setAttribute("uname", uname); session.setAttribute("upwd", upwd); response.sendRedirect("dlcg.jsp"); } else { //错误页面 out.print("登陆失败"); } %>
8.zccontrol.jsp
<%@page import="com.dao.StuDao"%> <%@page import="com.bean.Stu"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% Stu s = new Stu(); int id = Integer.parseInt(request.getParameter("sid")); s.setSid(id); String uname = request.getParameter("uname"); s.setUname(uname); String upwd = request.getParameter("upwd"); s.setUpwd(upwd); StuDao sd = new StuDao(); if (sd.addStu(s) > 0) { //跳转注册成功页面 session.setAttribute("uname", uname); session.setAttribute("upwd", upwd); response.sendRedirect(request.getContextPath() + "/zhuce.jsp"); } else { out.print("注册失败！"); } %>h
