JSP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。
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 {
// 根据姓名查看所有邮件
public List<Msg> getMailByReceiver(String name) {
List<Msg> list = new ArrayList<Msg>();
Connection con = getConnection();
String sql = "select * from msg where sendto=?";
PreparedStatement ps = null;
ResultSet rs = null;
try {
ps = con.prepareStatement(sql);
ps.setString(1, name);
rs = ps.executeQuery();
while (rs.next()) {
Msg m = new Msg();
m.setMsgid(rs.getInt("msgid"));
m.setUsername(rs.getString("username"));
m.setTitle(rs.getString("title"));
m.setState(rs.getInt("state"));
m.setMsgcontent(rs.getString("msgcontent"));
m.setSendto(rs.getString("sendto"));
m.setMsg_create_date(rs.getDate("mgs_create_date"));
list.add(m);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
closeAll(con, ps, rs);
}
return list;
}
// 添加邮件(写邮件，回复邮件都调用，邮件状态为1(未读)，时间为系统当前时间)
public void addMsg(Msg m) {
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, m.getUsername());
ps.setString(2, m.getTitle());
ps.setString(3, m.getMsgcontent());
ps.setString(4, m.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);
}
}
// 根据id删除邮件
public void delMsg(int id) {
Connection con = getConnection();
String sql = "delete from msg where msgid=" + id;
PreparedStatement ps = null;
try {
ps = con.prepareStatement(sql);
ps.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
closeAll(con, ps, null);
}
}
// 查看信息之后状态变为已读
public void updateMsg(int id) {
Connection con = getConnection();
String sql = "update msg set state='1' where msgid=?";
PreparedStatement pred = null;
try {
pred = con.prepareStatement(sql);
pred.setInt(1, id);
pred.executeUpdate();
} catch (SQLException e1) {
e1.printStackTrace();
} finally {
closeAll(con, pred, null);
}
}
// 查看详细信息
public Msg Cha(int msgid) {
Msg m = null;
Connection con = getConnection();
ResultSet rs = null;
PreparedStatement ps = null;
String sql = "select * from msg where msgid=?";
try {
ps = con.prepareStatement(sql);
ps.setInt(1, msgid);
rs = ps.executeQuery();
while (rs.next()) {
m = new Msg();
m.setMsgid(rs.getInt("msgid"));
m.setUsername(rs.getString("username"));
m.setTitle(rs.getString("title"));
m.setMsgcontent(rs.getString("msgcontent"));
m.setState(rs.getInt("state"));
m.setSendto(rs.getString("sendto"));
m.setMsg_create_date(rs.getDate("mgs_create_date"));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
closeAll(con, ps, rs);
}
return m;
}
}
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<form action="dowrite.jsp" method="post">
收件人:<input type="text" name="sendto" 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 import="entity.Msg"%>
<%@page import="dao.MsgDao"%>
<%@page import="dao.UsersDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
request.setCharacterEncoding("utf-8");
String uname=(String)session.getAttribute("uname");// 发件人在session中获取
String sendto=request.getParameter("sendto");
String title=request.getParameter("title");
String content=request.getParameter("content");
Msg m=new Msg();
m.setTitle(title);
m.setMsgcontent(content);
m.setUsername(uname);
m.setSendto(sendto);
MsgDao md=new MsgDao();
md.addMsg(m);
out.print("发送成功，即将跳回首页.....");
response.setHeader("refresh", "3;url=main.jsp");
%>
<%@page import="entity.Msg"%>
<%@page import="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 ="image/已读消息.png" />
<%;
}else{%>
<img src ="image/未读.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"%>
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<form action="dowrite.jsp" method="post">
收件人:<input type="text" name="sendto" 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" import="java.util.*" 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>
<%
String uname=(String)session.getAttribute("uname");
%>
<%
request.setCharacterEncoding("utf-8");
String msgid=request.getParameter("reply");
int id=Integer.parseInt(msgid);
%>
<table height="20px" width="100%" align="center" border="1">
<tr>
<td>发件人</td>
<td>主题</td>
<td>内容</td>
<td>时间</td>
</tr>
<%
MsgDao md=new MsgDao();
Msg m=md.Cha(id);
md.updateMsg(id);
%>
<tr>
<td><%=m.getUsername() %></td>
<td><%=m.getTitle() %></td>
<td><%=m.getMsgcontent() %></td>
<td><%=m.getMsg_create_date() %></td>
</tr>
</table>
</body>
</html>
