JSP第十二周作业

1.实现 删除 回复邮件

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;
    }
 
    public void addMsg(Msg m) {
        Connection conn = getConnection();
        String sql = "insert into mail(sender,addressee,title,content,sending_time,state) values(?,?,?,?,?,?)";
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(sql);
            ps.setString(1, m.getSender());
            ps.setString(2, m.getAddressee());
            ps.setString(3, m.getTitle());
            ps.setString(4, m.getContent());
            ps.setDate(5, new java.sql.Date(new Date().getTime()));
            ps.setInt(6, m.getState());
            ps.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            closeAll(conn, ps, null);
        }
 
    }
 
    public void delMail(int id) {
        Connection conn = getConnection();
        String sql = "delete from mail where eid=?";
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(sql);
            ps.setInt(1, id);
            ps.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            closeAll(conn, ps, null);
        }
 
    }
 
    public Msg getMailById(int id) {
        Connection conn = getConnection();
        String sql = "select * from mail where eid=?";
        PreparedStatement ps = null;
        ResultSet rs = null;
        Msg m = null;
        try {
            ps = conn.prepareStatement(sql);
            ps.setInt(1, id);
            rs = ps.executeQuery();
            while (rs.next()) {
                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");
 
                m.setEid(eid);
                m.setSender(sender);
                m.setAddressee(addressee);
                m.setTitle(title);
                m.setContent(content);
                m.setSending_time(sending_time);
                m.setState(readMail(id) == 1 ? 0 : 1);
            }
 
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            closeAll(conn, ps, rs);
        }
        return m;
    }
 
    public int readMail(int id) {
        int n = 0;
        Connection conn = getConnection();
        String sql = "update mail set state='0' where eid=?";
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(sql);
            ps.setInt(1, id);
            n = ps.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            closeAll(conn, ps, null);
        }
        return n;
    }
}

<%@ 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:400px;
}
 
table, table tr th, table tr td {
    border: 1px solid #000000;
}
table td{
    text-align:center;
}
img{
width:30px;
 
}
a{
text-decoration: none;
}
a:link{
color:black;
}
</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><td>操作</td><td>操作</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><a href=\"detail.jsp?id="+list.get(i).getEid() +"\">" + list.get(i).getTitle() + "</a></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>");
        out.print("<td><a href=\"delete.jsp?id="+list.get(i).getEid()+"\">删除</a></td>");
        out.print("<td><a href=\"write.jsp?id="+list.get(i).getEid()+"&reply="+list.get(i).getSender()+"\">回复</a></td></tr>");
    }
%>
 
 
</tr>
 
 
</table>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ page import="dao.MsgDao"%>
<!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>
<%
      
    int id=Integer.parseInt(request.getParameter("id"));
    MsgDao md=new MsgDao();
    md.delMail(id);
    response.sendRedirect("main.jsp");
 
 %>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ page import="dao.MsgDao"%>
<%@ page import="entity.Msg"%>
<!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>
<%
int id=Integer.parseInt(request.getParameter("id"));
MsgDao md = new MsgDao();
md.readMail(id);
%>
<form action="dowrite.jsp" method="post">
         
    收件人:<input type="text" name="addressee"  value="<%=request.getParameter("reply")%>"><br>
    主题: <input  type="text" name="title" ><br>
    内容  <textarea rows="6" cols="20" name="content"></textarea>
        <br>
        <input type="submit" value="发送">
</form>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ page import="entity.Msg"%>
<%@ page import="dao.MsgDao"%>
<!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>
<%
    request.setCharacterEncoding("utf-8");
    String uname=(String)session.getAttribute("uname");
    String addressee=request.getParameter("addressee");
    String title=request.getParameter("title");
    String content=request.getParameter("content");
     
    Msg m=new Msg();
    m.setContent(content);
    m.setSender(uname);
    m.setAddressee(addressee);
    m.setTitle(title);
     
    MsgDao md=new MsgDao();
    md.addMsg(m);
     
    out.print("发送成功.....");
    response.setHeader("refresh", "5;url=main.jsp");
     
     
 %>
</body>
</html>

 

 

 

 

 

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。

<%@ 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;
 
}
a{
text-decoration: none;
}
a:link{
color:black;
}
</style>
</head>
<body>
<table 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>
 
<%
int id=Integer.parseInt(request.getParameter("id"));
    MsgDao md = new MsgDao();
    Msg m = md.getMailById(id);
 
        out.print("<tr><td>"+ m.getSender() + "</td>");
        out.print("<td><a href=\"detail.jsp?id="+m.getEid() +"\">" + m.getTitle() + "</a></td>");
        if (m.getState() == 1) {
            out.print("<td><img src=\"img/wd.png\"/></td>");
        } else {
            out.print("<td><img src=\"img/yd.png\"/></td>");
        }
        out.print("<td>" + m.getSending_time() + "</td>");
        out.print("<td><a href=\"delete.jsp?id="+m.getEid()+"\">删除</a></td>");
        out.print("<td><a href=\"write.jsp?reply="+m.getEid()+"\">回复</a></td></tr>");
%>
<form action="main.jsp" method="post">
<input type="submit" value="返回主页">
</form>
 
 
 
</tr>
 
 
</table>
</body>
</html>