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 lmq;
 
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 lmq;
 
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%>">
  </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>
  <body>
  <h1>登录成功</h1>
  </body>
</html>

 

posted @ 2022-05-08 00:09  xiaoQ1  阅读(16)  评论(0)    收藏  举报