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JSP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)

CREATE TABLE stu (
	uid INT auto_increment PRIMARY KEY,
	uname VARCHAR (10),
	upwd VARCHAR (10),
	uage INT
)

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

register.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
    
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>

<form action="jump.jsp" method="post">
			<b>用户名</b>
			<input type="text" name="uname" />
			<br />
			<b>密码</b>
			<input type="text" name="upwd" />
			<br />
			<b>年龄</b>
			<input type="text" name="uage"/>
			<br />
			<input type="submit" value="注册" />
			<a href="login.jsp">登录</a>
		</form>
</body>
</html>

jump.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
	pageEncoding="utf-8"%>
<%@ page import="dao.StuDao"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
	<%
		String uname = request.getParameter("uname");
		String upwd = request.getParameter("upwd");
		String uages = request.getParameter("uage");

		int uage = Integer.parseInt(uages);
		StuDao s1 = new StuDao();
		s1.reg(uname, upwd, uage);
		request.getRequestDispatcher("login.jsp").forward(request, response);
	%>
</body>
</html>

login.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<form action="verification.jsp" method="post">
			<b>用户名</b>
			<input type="text" name="uname" />
			<br />
			<b>密码</b>
			<input type="text" name="upwd" />
			<br />
			<input type="submit" value="登录" />
			<a href="register.jsp">注册</a>
</form>
</body>
</html>

verification.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
	pageEncoding="utf-8"%>
<%@ page import="dao.StuDao"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
	<%
		String uname = request.getParameter("uname");
		String upwd = request.getParameter("upwd");

		StuDao s1 = new StuDao();
		if (s1.login(uname, upwd)) {
			request.getRequestDispatcher("main.jsp").forward(request, response);
		} else {
			request.getRequestDispatcher("false.jsp").forward(request, response);
		}
	%>
</body>
</html>

main.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
	pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
	<h1>登录成功</h1>
</body>
</html>

false.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
	pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
	<h1>登录失败,3秒后返回登录界面</h1>
	<%
		response.setHeader("refresh", "3;url=login.jsp");
	%>
</body>
</html>

StuDao.java

package dao;

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(?,?,?)";
			// 4.执行SQL语句
			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);
		}

	}

}

BaseDao.java

package dao;

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();
		}
	}
}
posted @ 2022-05-04 12:08  Y6  阅读(68)  评论(0编辑  收藏  举报