第十二周作业
package dao;
import pojo.Msg;
import util.DBUtil;
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;
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;
}
}
package dao;
import java.sql.*;
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/mysqldb?useSSL=true&useUnicode=true&characterEncoding=utf8", "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 dao;
import util.DBUtil;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class UserDao extends BaseDao{
public boolean login(String name,String pwd){
boolean f=false;
Connection conn= DBUtil.getCon();
String sql="select * from users 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 int reg(String uname, String upwd) {
Connection conn = getConnection();
int i=0;
PreparedStatement ps = null;
try {
String sql = "insert into users(uname,upwd) values(?,?)";
ps = conn.prepareStatement(sql);
ps.setString(1, uname);
ps.setString(2, upwd);
i=ps.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
closeAll(conn, ps, null);
}
return i;
}
}
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ page import="dao.MsgDao"%>
<%@ page import="pojo.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"%>
<%@ page import="pojo.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="pojo.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>
<%@ 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="pojo.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>
posted on 2022-05-22 13:40 chenyulin11 阅读(8) 评论(0) 收藏 举报
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