jsp第七次作业

package com.gd.dao;

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/dinghaiyang", "root", "root");
            } 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.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 com.gd.entity.Msg;

public class MsgDao extends BaseDao {
    // 发送,回复---insert操作

    // 邮件列表 --select * from msg where username=....
    public List<Msg> getMailByReceiver(String receiverName) {
        List<Msg> list = new ArrayList<Msg>();

        try {
            Connection con = getConnection();//获取连接
            String sql = "select * from msg where sendto=?";//编写sql语句
            PreparedStatement ps = con.prepareStatement(sql);
            ps.setString(1, receiverName);////给sql问号赋值
            ResultSet rs = ps.executeQuery();//执行查询
            //处理查询结果
            while(rs.next()){
                //循环读取rs结果集,每一行作为一个msg对象,放入list集合中
                Msg msg=new Msg();
                msg.setMsgid(rs.getInt("msgid"));
                msg.setMsgcontent(rs.getString("msgcontent"));
                msg.setMsg_create_date(rs.getDate("msg_create_date"));
                msg.setSendto(rs.getString("sendto"));
                msg.setState(rs.getInt("state"));
                msg.setTitle(rs.getString("title"));
                msg.setUsernname(rs.getString("username"));
                list.add(msg);
            }
            closeAll(con, ps, rs);
            
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return list;
    }

//    public static void main(String[] args) {
//        MsgDao md=new MsgDao();
//        List<Msg> list=md.getMailByReceiver("小白");
//        System.out.println(list.size());
//    }
    // 根据id查内容 select
    public Msg getMailById(int id){
        Msg msg=new Msg();
        try {
            
            Connection con = getConnection();//获取连接
            String sql = "select * from msg where id=?";//编写sql语句
            PreparedStatement ps = con.prepareStatement(sql);
            ps.setInt(1, id);////给sql问号赋值
            ResultSet rs = ps.executeQuery();//执行查询
            //处理查询结果
            while(rs.next()){
                //循环读取rs结果集,每一行作为一个msg对象,放入list集合中
                
                msg.setMsgid(rs.getInt("msgid"));
                msg.setMsgcontent(rs.getString("msgcontent"));
                msg.setMsg_create_date(rs.getDate("msg_create_date"));
                msg.setSendto(rs.getString("sendto"));
                msg.setState(rs.getInt("state"));
                msg.setTitle(rs.getString("title"));
                msg.setUsernname(rs.getString("username"));
                
            }
            closeAll(con, ps, rs);
            
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return msg;
    }

    // 阅读状态改变,,,未读 已读 update

    // 删除邮件 delete

}

package com.gd.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class UsersDao extends BaseDao {
    // 登录功能
    public boolean login(String uname, String upwd) throws SQLException {
        // 获取连接
        Connection conn = getConnection();
        // 编写sql语句
        String sql = "select * from users where username=? and password=?";
        // 执行sql语句
        PreparedStatement ps = conn.prepareStatement(sql);
        ps.setString(1, uname);
        ps.setString(2, upwd);
        ResultSet rs = ps.executeQuery();
        if (rs.next()) {
            closeAll(conn, ps, rs);
            return true;
        } else {
            closeAll(conn, ps, rs);
            return false;

        }
    }
//    public static void main(String[] args) {
//        UsersDao ud=new UsersDao();
//        try {
//            System.out.println(ud.login("tom", "456"));
//        } catch (SQLException e) {
//            // TODO Auto-generated catch block
//            e.printStackTrace();
//        }
//    }

}

<%@page import="com.gd.entity.Msg"%>
<%@page import="com.gd.dao.MsgDao"%>
<%@page import="com.gd.entity.Users"%>
<%@ 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%>">

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
</head>

<body>
    欢迎页面!!!欢迎你!!!<%
    Users u = (Users) session.getAttribute("user");
    out.print(u.getUsername());
    MsgDao md=new MsgDao();
    List<Msg> list=md.getMailByReceiver(u.getUsername());
    out.print(list.size());
%>
<a href="">写邮件</a>
<table border="1"  width="1000">
<tr>
<td>邮件id</td>
<td>发件人</td>
<td>标题</td>
<td>收件人</td>
<td>状态</td>
<td>时间</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
</tr>

<%
for(int i=0;i<list.size();i++){
 %>
 <tr>
 <td><%=list.get(i).getMsgid() %></td>
<td><%=list.get(i).getUsernname() %></td>
<td><a href="detail.jsp?id=<%=list.get(i).getMsgid()%>"><%=list.get(i).getTitle()%></a></td>
<td><%=list.get(i).getSendto() %></td>
<td><% if(list.get(i).getState()==1){ %>
<img src="images/sms_unReaded.png"></img>
<%}else{ %>
<img src="images/sms_readed.png"></img>
<%} %>


</td><!-- 0已读,1未读 -->
<td><%=list.get(i).getMsg_create_date() %></td>
 <td><a href="">回复</a></td>
  <td><a href="">删除</a></td>
 
 </tr>
 
 
 
 <%} %>


</talbe>


</body>
</html>

<%@ 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%>">
    
    <title>My JSP 'index.jsp' starting page</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>
  
  <body>
   <form action="dologin.jsp" method="post">
用户名:<input type="text" name="uname" value="小白" /><Br>
密码 ：<input type="password" name="upwd" value="88888"/><br>

<input type="submit" value="登录">

</form>
  </body>
</html>

<%@page import="com.gd.entity.Users"%>
<%@page import="com.gd.dao.UsersDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
    request.setCharacterEncoding("utf-8");
    String uname = request.getParameter("uname");
    String upwd = request.getParameter("upwd");
    UsersDao ud = new UsersDao();
    if (ud.login(uname, upwd)){        
    //登录成功,创建User对象,并放入session
        Users u=new Users();
        u.setUsername(uname);
        u.setPassword(upwd);
        session.setAttribute("user", u);
        request.getRequestDispatcher("main.jsp").forward(request, response);
    }
    else
        response.sendRedirect("index.jsp");
%>