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）
index.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 '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="form1" method="post" action="control.jsp" >
<table>
<tr>
<td>编号：</td>
<td> <input type="text" name="sid" id="userName" ></td>
</tr>
<tr>
<td>用户名：</td>
<td> <input type="text" name="uname" id="userName" ></td>
</tr>
<tr>
<td>输入登录密码：</td>
<td><input type="password" name="upwd" id="pwd"></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="注册"></td>
</tr>
</table>
</form>
</body>
</html>
StuDao.java
package com.he.dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import com.he.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/zdh", "root", "root"); // 写SQL语句 String sql = "insert into Stu values(?,?,?)"; // 执行 PreparedStatement ps = con.prepareStatement(sql); ps.setInt(1, s.getUid()); 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 }
Stu.java
package bean; public class Stu { private int sid; private String uname; private String upwd; // 访问器 public int getSid() { return sid; } public void setSid(int sid) { this.sid = sid; } public String getUname() { return uname; } public void setUname(String uname) { this.uname = uname; } public String getUpwd() { return upwd; } public void setUpwd(String upwd) { this.upwd = upwd; } // 构造器 public Stu(int sid, String uname, String upwd) { super(); this.sid = sid; this.uname = uname; this.upwd = upwd; } public Stu() { super(); } }
control.jsp
<%@page import="com.gd.dao.stuDao"%> <%@page import="com.gd.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 }else{ //错误页面 } %> <% if(uname.equals("zs")&&upwd.equals("123")){ //跳转成功登录页面 request.getRequestDispatcher("welcome.jsp").forward(request, response); session.setAttribute("uname",uname); } else{ //错误页面 request.getRequestDispatcher("index.jsp").forward(request, response); } %>
index.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 '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="form1" method="post" action="control.jsp" > <table> <tr> <td>编号：</td> <td> <input type="text" name="sid" id="userName" ></td> </tr> <tr> <td>用户名：</td> <td> <input type="text" name="uname" id="userName" ></td> </tr> <tr> <td>输入登录密码：</td> <td><input type="password" name="upwd" id="pwd"></td> </tr> <tr> <td colspan="2"><input type="submit" value="注册"></td> </tr> </table> </form> </body> </html>