第十周
1.设计一个注册页面，实现用户注册功能
2.设计一个登陆页面，实现用户名密码登陆
3.两个页面可以互相超链接
package ssss;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class BaseDao {
//获取连接
protected Connection getConnection(){
Connection conn=null;
try {
Class.forName("com.mysql.jdbc.Driver");
// 2.建立连接
conn = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/test?serverTimezone=UTC&useSSL=false","root","123456");
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
//关闭连接
protected void closeAll(Connection con,PreparedStatement ps,ResultSet rs){
try {
if(rs != null)
rs.close();
if(ps != null)
ps.close();
if(con != null)
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
package ssss;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class StuDao extends BaseDao {
public boolean login(String name, String pwd) {
boolean f = false;
Connection conn = getConnection();
String sql = "select * from stu where uname=? and upwd=?";
PreparedStatement ps = null;
ResultSet rs = null;
try {
ps = conn.prepareStatement(sql);
ps.setString(1, name);
ps.setString(2, pwd);
rs = ps.executeQuery();
if (rs.next())
f = true;
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
closeAll(conn, ps, rs);
}
return f;
}
public void reg(String uname, String upwd) {
Connection conn = getConnection();
PreparedStatement ps = null;
try {
String sql = "insert into stu(uname,upwd) values(?,?)"; // 2个占位符
// 4.执行SQL语句
ps = conn.prepareStatement(sql);
ps.setString(1, uname);
ps.setString(2, upwd);
ps.executeUpdate();// 增删改都用这个
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
closeAll(conn, ps, null);
}
}
}
<%@ 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>
<script type="text/javascript">
function validate(){
if(loginForm.uname.value==""){
alert("账号不能为空!");
return;
}
if(loginForm.upwd1.value==""){
alert("密码不能为空!");
return;
}
if(loginForm.upwd1.value!=loginForm.upwd2.value){
alert("密码不一致，请重新输入!");
return;
}
loginForm.submit();
}
</script>
<form name="loginForm" action="dozhuce.jsp" method="post">
用户名:<input type="text" name="uname" ><br>
密码: <input type="password" name="upwd1" ><br>
确认密码: <input type="password" name="upwd2" >
<input type="button" value="注册" onClick="validate()">
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
%>
<!DOCTYPE HTML>
<html>
<head>
<title>登录</title>
</head>
<body>
<h1>欢迎</h1>
<form action="dologin.jsp" method="post">
<table>
<tr>
<td>用户名</td>
<td><input type="text" name="uname"></td>
</tr>
<tr>
<td>密码</td>
<td><input type="password" name="password"></td>
</tr>
<tr>
<td><input type="submit" value="登录"></td>
<td><a href="register.jsp">注册</a></td>
</tr>
</table>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");%>
<!DOCTYPE HTML>
<html>
<head>
<title></title>
</head>
<body>
<h1>登录成功</h1>
</body>
</html>
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