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>学号：</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>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>
Student.java
package com.liu.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import com.liu.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
}
user.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page language="java" import="java.util.*"%>
<%@ page import ="java.sql.*"%>
<%@page import="com.jjy.dao.jspdataDao"%>
<%@page import="com.jjy.bean.jspdata"%>
<html>
<head>
<title>欢迎你</title>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
jspdata u= new jspdata();
String uname = request.getParameter("name");uname.trim();
u.setUname(uname);
String upwd = request.getParameter("password");upwd.trim();
u.setUpwd(upwd);
jspdataDao ss=new jspdataDao();
if(ss.queryUers(u)>0){
%><p>欢迎<%=uname%></p><%
}else{%> <p>输入错误</p><a href="index.jsp"><button>返回</button></a>
<%
}
%>
</body>
</html>