第十二周作业

1.实现 删除 回复邮件
2.实现阅读邮件功能：在main.jsp中点击任意邮件的标题，进入到detail.jsp显示邮件详情，包括发件人，主题，内容，时间。同时需要把邮件状态修改为已读。

package com.sf.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 javax.annotation.PreDestroy;

import com.sf.entity.msg;
import com.sun.org.apache.regexp.internal.recompile;

public class msgDao extends BaseDao{
    
    public List<msg> listAll(String sendto) throws SQLException{
        List<msg> list =new ArrayList<msg>();
        Connection conn =getConnection();
        String sql="select * from msg where sendto=?";
        PreparedStatement pred =null;
        
        ResultSet rest=null;
        try {
            pred=conn.prepareStatement(sql);
            pred.setString(1, sendto);
            rest=pred.executeQuery();
            while (rest.next()) {
                msg msg=new msg();
                msg.setMsgid(rest.getInt("msgid"));
                msg.setUsername(rest.getString("username"));
                msg.setTitle(rest.getString("title"));
                msg.setMsgcontent(rest.getString("msgcontent"));
                msg.setState(rest.getInt("state"));
                msg.setSendto(rest.getString("sendto"));
                msg.setMsg_create_date(rest.getDate("msg_create_date"));
                list.add(msg);
            }
        } catch (Exception e) {
            // TODO: handle exception
        }
        finally{
            closeAll(conn, pred, rest);
        }
        return list;
    }
    
    public void changestate(Integer msgid){
        Connection conn =getConnection();
        
        String sql="update msg set state=1 where msgid=?";
        PreparedStatement pred=null;

        try {

            pred =conn.prepareStatement(sql);
            pred.setInt(1, msgid);
            pred.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        finally{
            closeAll(conn, pred, null);
        }
    }
        public List<msg> showContent(Integer msgid) {
            List<msg> list=new ArrayList<msg>();
            Connection conn=getConnection();
            String sql="select * from msg where msgid=?";
            PreparedStatement pred=null;
            ResultSet rest=null;
            try {
                pred = conn.prepareStatement(sql);
                pred.setInt(1, msgid);
                rest =pred.executeQuery();
                while(rest.next()){
                    msg msg =new msg();
                    msg.setUsername(rest.getString("username"));
                    msg.setTitle(rest.getString("title"));
                    msg.setMsgcontent(rest.getString("msgcontent"));
                    msg.setMsg_create_date(rest.getDate("msg_create_date"));
                    list.add(msg);
                }
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            finally{
                closeAll(conn, pred, rest);
            }
            return list;
        }
        public void delmsg(Integer msgid){
            Connection conn =getConnection();
            
            String sql="delete from msg where msgid=?";
            PreparedStatement pred=null;

            try {

                pred =conn.prepareStatement(sql);
                pred.setInt(1, msgid);
                pred.executeUpdate();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            finally{
                closeAll(conn, pred, null);
            }
        }
        
        public void send(msg msg){
            Connection conn=getConnection();
            String sql="insert into msg(username,title,msgcontent,state,sendto,msg_create_date) values(?,?,?,0,?,?)";
            PreparedStatement ps=null;
            try {
                 ps=conn.prepareStatement(sql);
                 ps.setString(1, msg.getUsername());
                 ps.setString(2, msg.getTitle());
                 ps.setString(3, msg.getMsgcontent());
                 ps.setString(4, msg.getSendto());
                 ps.setDate(5, new java.sql.Date(new Date().getTime()));
                 ps.executeUpdate();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }finally{
                closeAll(conn, ps, null);
            }        
        }
}

<%@page import="com.yxf.entity.Msg"%>
<%@page import="com.yxf.dao.MsgDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
 
<html>
<head>
<title>My JSP 'index.jsp' main page</title>
</head>
<body>
<%
    String uname=(String)session.getAttribute("uname");
 %>
 欢迎你 <% out.print(uname); %> <a href="write.jsp">写邮件</a>
 <table height="20px" width="100%" align="center" border="1">
       <tr>
           <td>发件人</td>
           <td>主题</td>
           <td>状态</td>
           <td>时间</td>
           <td>操作</td>
           <td>操作</td>
       </tr>
         <%
         MsgDao md=new MsgDao();
         List<Msg> list=md.getMailByReceiver(uname);  
            for(Msg m:list)
            {%>
           <tr>
               <td><%=m.getUsername() %></td>
               <td><a href="detail.jsp?reply=<%=m.getMsgid()%>"><%=m.getTitle() %></a></td>
               <td><%
               int state=m.getState();
               if(state==1){ %>
                   <img src ="images/sms_readed.png" />
                   <%;
               }else{%>
                   <img src ="images/sms_unReaded.png" />
                   <%;
               }
               %></td>
               <td><%=m.getMsg_create_date() %></td>
               <td><a href="write.jsp?reply=<%=m.getUsername()%>">回复</a></td>
               <td><a href="del.jsp?id=<%=m.getMsgid()%>">删除</a></td>
           </tr>
            <%}
        %>
   </table>
</body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
  
 <!DOCTYPE HTML>
 <html>
 <head>
 <title></title>
 </head>
 <body>
     <form action="dowrite.jsp" method="post">
        <table>
            <tr>
                <td>收件人</td>
                <td><input type="text" name="sendto"
                    value="<%=request.getParameter("reply")%>"></td>
            </tr>
            <tr>
                <td>主题</td>
                <td><input type="text" name="title"></td>
            </tr>
            <tr>
                <td>内容</td>
                <td><textarea rows="6" cols="20" name="content"></textarea></td>
            </tr>
            <tr>
                <td><input type="submit" value="发送"></td>
            </tr>
        </table>
    </form>
    <a href="main.jsp">返回</a>
</body>
</html>

<%@page import="com.yxf.dao.MsgDao"%>
<%@page import="com.yxf.entity.Msg"%>
  
 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
  
 <!DOCTYPE HTML>
 <html>
 <head>
 <title></title>
</head>
<body>
    <%
        request.setCharacterEncoding("utf-8");
        Msg e = new Msg();
        String username = (String) session.getAttribute("uname");
        e.setUsername(username);
        String sendto = request.getParameter("sendto");
        e.setSendto(sendto);
        String title = request.getParameter("title");
        e.setTitle(title);
        String msgcontent = request.getParameter("msgcontent");
        e.setMsgcontent(msgcontent);
        MsgDao md = new MsgDao();
        md.addMsg(e);
 
        out.print("发送成功，即将跳回首页...");
        response.setHeader("refresh", "1;url=main.jsp");
    %>
 
</body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
  
 <html>
 <head>
  
 <title></title>
  
 </head>
 <%@ page import="com.yxf.dao.MsgDao"%>
<body>
    <%
        String Id = request.getParameter("id");
        int msgid = Integer.parseInt(Id);
        MsgDao md = new MsgDao();
        md.xiugai(msgid);
        out.println(md.chakan(msgid));
    %>
    <br>
    <a href="main.jsp">返回</a>
</body>
</html>

<%@page import="com.yxf.dao.MsgDao"%>
 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
 <html>
 <head>
 <title></title>
 </head>
  
 <body>
     <%
        try {
            String msgid = request.getParameter("msgid");
            int msgId = Integer.parseInt(msgid);
            MsgDao md = new MsgDao();
            if (md.deleteMsg(msgId) != -1) {
                out.println("删除成功!");
                out.println("即将跳转到主页面...");
                response.setHeader("refresh", "1;url=main.jsp");
            } else {
                out.println("删除失败！");
                out.println("即将跳转到主页面...");
                response.setHeader("refresh", "1;url=main.jsp");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    %>
</body>
</html>