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)

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 com.gd.entity;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

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", "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 com.gd.entity;

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(Integer stuid,String uname, String upwd,Integer uage) {
        Connection conn = getConnection();
        PreparedStatement ps = null;
        try {
            String sql = "insert into stu(stuid,uname,upwd,uage) values(?,?,?,?)"; // 2个占位符
            // 4.执行SQL语句
            ps = conn.prepareStatement(sql);
            
            ps.setInt(1, stuid);
            ps.setString(2, uname);
            ps.setString(3, upwd);
            ps.setInt(4, uage);
            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"%>



<html>
<head>


</head>

<body>
    <script type="text/javascript">
        function loginButton(){
            if(loginForm.uname.value==""){
                alert("账号不能为空!");
                return;
            }
            if(loginForm.psd.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="uname" ><br> 
    密码: <input  type="password" name="psd"  ><br>
    <input type="button" value="登录" onClick="loginButton()">    <br>
    <a href="zc.jsp">注册</a>





    </form>
</body>
</html>
<%@page import="com.gd.entity.StuDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>



<html>
<head>


</head>

<body>
    <%
        StuDao sd = new StuDao();
        request.setCharacterEncoding("utf-8");
        String uname = request.getParameter("uname");
        String psd = request.getParameter("psd");
        if (sd.login(uname, psd)) {
            //session.setAttribute("uname", uname);
            request.getRequestDispatcher("index.jsp").forward(request,
                    response);
        } else {
            out.print("登录失败，5秒后跳回登录页！！！");
            response.setHeader("refresh", "5;url=login.jsp");
        }
    %>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>



<html>
  <head>
   

  </head>
  
  <body>
<script type="text/javascript">
 function zcButton(){
            if(loginF.stuid.value==""){
                alert("id不能为空!");
                return;
            }
            if(loginF.uname.value==""){
                alert("账号不能为空!");
                return;
            }
            if(loginF.psd.value==""){
                alert("密码不能为空!");
                return;
            }
            if(loginF.rpsd.value==""){
                alert("确认密码不能为空!");
                return;
            }
            if(loginF.age.value==""){
                alert("年龄不能为空!");
                return;
            }
            loginF.submit();
        }
</script>


    <form name="loginF" action="dozc.jsp" method="post">
    stuid:<input type="number" name="stuid" ><br> 
    用户名:<input type="text" name="uname" value="aa"><br> 
    密码: <input  type="password" name="psd"  ><br> 
    确认密码: <input  type="password" name="rpsd"  ><br> 
    年龄:<input type="number" name="age" ><br> 
        <input type="button" value="注册" onClick="zcButton()">    <br>
         <a href="login.jsp">返回登录</a>
        
    </form>
  </body>
</html>
<%@page import="com.gd.entity.StuDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>



<html>
<head>


</head>

<body>
    <%
        request.setCharacterEncoding("utf-8");
        String id = request.getParameter("stuid");
        Integer stuid = Integer.parseInt(id);
        String uname = request.getParameter("uname");
        String psd = request.getParameter("psd");
        String rpsd = request.getParameter("rpsd");
        String age = request.getParameter("age");
        Integer uage = Integer.parseInt(age);
        if ((psd.equals(rpsd))) {
            StuDao sd = new StuDao();
            sd.reg(stuid, uname, psd, uage);
            out.print("注册成功，即将跳回登录页.....");
            response.setHeader("refresh", "5;url=login.jsp");
        } else {
            out.print("两次密码不一致，即将跳回注册页.....");
            response.setHeader("refresh", "5;url=zc.jsp");
        }
    %>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>


<html>
  <head>
 
  </head>
  
  <body>
    登陆成功！！！
  </body>
</html>

 

posted @ 2022-05-08 15:11  聂芳芳  阅读(17)  评论(0)    收藏  举报