JSP第九次作业

1.建库,建表2个
用户表(id,用户名,密码)
邮件表(id,发件人,收件人,标题,内容,发送时间,状态)

2.建model层
entity,dao包

3.登陆,注册,登陆后显示全部邮件

  CREATE TABLE euser (
    uid INT auto_increment PRIMARY KEY,
    uname VARCHAR (10),
    upwd VARCHAR (10)
)
CREATE TABLE mail (
    eid INT auto_increment PRIMARY KEY,
    sender VARCHAR (10),
    addressee VARCHAR (10),
    title VARCHAR (10),
    content VARCHAR (10),
    sending_time datetime,
    state INT
)
INSERT INTO mail ()
VALUES
    (
        2,
        'mm',
        'dd',
        '资料',
        'JSP',
        '2022-05-15 ',
        1
    );

 

package dao;
 
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
 
import entity.Msg;
 
public class MsgDao extends BaseDao {
 
    public List<Msg> getMailByReceiver(String name) {
        List<Msg> list = new ArrayList<Msg>();
        Connection conn = getConnection();
        String sql = "select * from mail where addressee=?";
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            ps = conn.prepareStatement(sql);
            ps.setString(1, name);
            rs = ps.executeQuery();
            while (rs.next()) {
                Msg m = new Msg();
                int eid = rs.getInt("eid");
                String sender = rs.getString("sender");
                String addressee = rs.getString("addressee");
                String title = rs.getString("title");
                String content = rs.getString("content");
                Date sending_time = rs.getDate("sending_time");
                int state = rs.getInt("state");
                m.setEid(eid);
                m.setSender(sender);
                m.setAddressee(addressee);
                m.setTitle(title);
                m.setContent(content);
                m.setSending_time(sending_time);
                m.setState(state);
                list.add(m);
            }
 
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            closeAll(conn, ps, rs);
        }
        return list;
    }
 
}

package dao;
 
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
 
public class UsersDao extends BaseDao{
     
    public boolean login(String name,String pwd){
        boolean f=false;
        Connection conn=getConnection();
        String sql="select * from euser where uname=? and upwd=?";
        PreparedStatement ps;
        try {
            ps = conn.prepareStatement(sql);
            ps.setString(1, name);
            ps.setString(2, pwd);
            ResultSet rs=ps.executeQuery();
            if(rs.next())
                f=true;
            closeAll(conn, ps, rs);
             
             
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }      
        return f;
    }
     
    public void reg(String uname, String upwd) {
        Connection conn = getConnection();
        PreparedStatement ps = null;
        try {
            String sql = "insert into euser(uname,upwd) values(?,?)";
            // 4.执行SQL语句
            ps = conn.prepareStatement(sql);
            ps.setString(1, uname);
            ps.setString(2, upwd);
            ps.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            closeAll(conn, ps, null);
        }
 
    }
     
 
}
<%@ 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="doreg.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="注册" />
            <a href="login.jsp">登录</a>
        </form>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ page import="dao.UsersDao"%>
<!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");
        UsersDao ud=new UsersDao();
        ud.reg(uname, upwd);
        request.getRequestDispatcher("login.jsp").forward(request, response);
    %>
</body>
</html>

<%@ 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>
    <script type="text/javascript">
        function validate() {
            if (loginForm.uname.value == "") {
                alert("账号不能为空!");
                return;
            }
            if (loginForm.upwd.value == "") {
                alert("密码不能为空!");
                return;
            }
            loginForm.submit();
        }
    </script>
 
 
    <form name="loginForm" action="dologin.jsp" method="post">
 
        <b>用户名:</b>
        <input type="text" name="uname"><br>
        <b>密码:</b>
        <input type="password" name="upwd"><br>
        <input type="button" value="登录" onClick="validate()">
        <a href="reg.jsp">注册</a>
    </form>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ page import="dao.UsersDao"%>
<!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");
     
    UsersDao ud=new UsersDao();
    if(ud.login(uname, upwd)){
        session.setAttribute("uname", uname);
        request.getRequestDispatcher("main.jsp").forward(request, response);
    }else{
        out.print("登陆失败,即将跳回登陆页.....");
        response.setHeader("refresh", "5;url=login.jsp");
    }
 %>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ page import="dao.MsgDao"%>
<%@ page import="entity.Msg"%>
<%@ page import="java.util.List"%>
<%@ page import="java.util.ArrayList"%>
<!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>
<style>
table {
    border-collapse: collapse;
    width:300px;
}
 
table, table tr th, table tr td {
    border: 1px solid #000000;
}
table td{
    text-align:center;
}
img{
width:30px;
 
}
</style>
</head>
<body>
<%String uname=(String)session.getAttribute("uname"); %>
首页!!欢迎你<%=uname %>
<table border="1">
<tr>
<td>发件人</td><td>主题</td><td>状态</td><td>时间</td>
 
<%
    MsgDao md = new MsgDao();
    List<Msg> list = md.getMailByReceiver(uname);
 
    for (int i = 0; i < list.size(); i++) {
        out.print("<tr><td>" + list.get(i).getSender() + "</td>");
        out.print("<td>" + list.get(i).getTitle() + "</td>");
        if (list.get(i).getState() == 1) {
            out.print("<td><img src=\"img/wd.png\"/></td>");
        } else {
            out.print("<td><img src=\"img/yd.png\"/></td>");
        }
 
        out.print("<td>" + list.get(i).getSending_time() + "</td></tr>");
    }
%>
 
 
</tr>
 
 
</table>
</body>
</html>

 

 

 

posted @ 2022-05-15 17:28  MaLD  阅读(8)  评论(0编辑  收藏  举报