第十周作业
数据库test 中建个表 stu(stuid 主键 自动增长 ，用户名，密码，年龄)
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
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'login.jsp' starting page</title>
</head>
<body>
<script type="text/javascript">
function validate(){
if(loginForm.stuname.value==""){
alert("账号不能为空!");
return;
}
if(loginForm.stupwd.value==""){
alert("密码不能为空!");
return;
}
loginForm.submit();
}
</script>
<form name="loginForm" action="dologin.jsp" method="post">
用户名:<input type="text" name="stuname" value=""><br>
密码: <input type="password" name="stupwd" value="">
<input type="button" value="登录" onClick="validate()">
<a href="register.jsp">注册</a>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'dologin.jsp' starting page</title>
</head>
<body>
<%
StuDao sd=new StuDao();
request.setCharacterEncoding("utf-8");
String stuname = request.getParameter("stuname");
String stupwd = request.getParameter("stupwd");
if (sd.login(stuname, stupwd)){
session.setAttribute("stuname", stuname);
request.getRequestDispatcher("main.jsp").forward(request, response);
}else{
out.print("登陆失败，即将跳回登陆页.....");
response.setHeader("refresh", "2;url=login.jsp");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'register.jsp' starting page</title>
</head>
<body>
<script type="text/javascript">
function validate(){
if(loginForm.stuname.value==""){
alert("账号不能为空!");
return;
}
if(loginForm.stupwd.value==""){
alert("密码不能为空!");
return;
}
if(loginForm.stupwd1.value==""){
alert("确认密码不能为空!");
return;
}
if(loginForm.stuage.value==""){
alert("年龄不能为空!");
return;
}
loginForm.submit();
}
</script>
<form name="loginForm" action="jump.jsp" method="post">
用户名:<input type="text" name="stuname" value=""><br>
密码: <input type="password" name="stupwd" value=""><br>
确认密码: <input type="password" name="stupwd1" value=""><br>
年龄:<input type="text" name="stuage" value=""><br>
<a href="login.jsp">返回登录</a>
<input type="button" value="注册" onClick="validate()">
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'jump.jsp' starting page</title>
</head>
<body>
<%
StuDao sd=new StuDao();
request.setCharacterEncoding("utf-8");
String stuname = request.getParameter("stuname");
String stupwd = request.getParameter("stupwd");
String stuages = request.getParameter("stuage");
int stuage = Integer.parseInt(stuages);
if(sd.reg(stuname, stupwd, stuage)){
request.getRequestDispatcher("login.jsp").forward(request, response);
}else{
out.print("注册失败");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'main.jsp' starting page</title>
</head>
<body>
登陆成功！ <br>
</body>
</html>
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,int uage) { Connection conn = getConnection(); PreparedStatement ps = null; try { String sql = "insert into stu(uname,upwd,uage) values(?,?,?)"; ps = conn.prepareStatement(sql); ps.setString(1, uname); ps.setString(2, upwd); ps.setInt(3, uage); ps.executeUpdate(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { closeAll(conn, ps, null); } } }
import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class BaseDao { protected Connection getConnection(){ Connection conn=null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection( "jdbc:mysql://localhost:3306/test", "root", "123456"); } catch (Exception e) { e.printStackTrace(); } return conn; } 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(); } } }
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