JSP第十一周作业
1.建库，建表2个
用户表（id,用户名，密码）
邮件表（id,发件人，收件人，标题，内容，发送时间，状态）
CREATE TABLE euser ( uid INT auto_increment PRIMARY KEY, uname VARCHAR (10), upwd VARCHAR (10) ) CREATE TABLE mail ( eid INT auto_increment PRIMARY KEY, sender VARCHAR (10), addressee VARCHAR (10), title VARCHAR (10), content VARCHAR (10), sending_time datetime, state INT ) INSERT INTO mail () VALUES ( 2, 'yy', 'xx', '学习资料', 'JSP', '2022-5-11 12:12:12', 1 ); INSERT INTO mail (sender,addressee,title,content,sending_time,state) VALUES ( 'xx', 'laoyu', '学习资料', 'Java', '2022-5-11 12:21:21', 1 ); INSERT INTO mail () VALUES ( 4, 'xx', 'yy', '学习资料', 'JSP', '2022-5-11 12:00:12', 0 ); INSERT INTO mail (sender,addressee,title,content,sending_time,state) VALUES ( 'mm', 'yy', '学习资料', 'Java', '2022-5-11 12:21:55', 1 );
2.建model层
entity,dao包
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;
}
}
package dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class UsersDao extends BaseDao{
public boolean login(String name,String pwd){
boolean f=false;
Connection conn=getConnection();
String sql="select * from euser 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 void reg(String uname, String upwd) {
Connection conn = getConnection();
PreparedStatement ps = null;
try {
String sql = "insert into euser(uname,upwd) values(?,?)";
// 4.执行SQL语句
ps = conn.prepareStatement(sql);
ps.setString(1, uname);
ps.setString(2, upwd);
ps.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
closeAll(conn, ps, null);
}
}
}
3.登陆，注册，登陆后显示全部邮件
reg.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!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>
<form action="doreg.jsp" method="post">
<b>用户名</b>
<input type="text" name="uname" />
<br />
<b>密码</b>
<input type="text" name="upwd" />
<br />
<input type="submit" value="注册" />
<a href="login.jsp">登录</a>
</form>
</body>
</html>
doreg.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ page import="dao.UsersDao"%>
<!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 = request.getParameter("uname");
String upwd = request.getParameter("upwd");
UsersDao ud=new UsersDao();
ud.reg(uname, upwd);
request.getRequestDispatcher("login.jsp").forward(request, response);
%>
</body>
</html>
login.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!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>
<script type="text/javascript">
function validate() {
if (loginForm.uname.value == "") {
alert("账号不能为空!");
return;
}
if (loginForm.upwd.value == "") {
alert("密码不能为空!");
return;
}
loginForm.submit();
}
</script>
<form name="loginForm" action="dologin.jsp" method="post">
<b>用户名:</b>
<input type="text" name="uname"><br>
<b>密码:</b>
<input type="password" name="upwd"><br>
<input type="button" value="登录" onClick="validate()">
<a href="reg.jsp">注册</a>
</form>
</body>
</html>
dologin.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ page import="dao.UsersDao"%>
<!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 = request.getParameter("uname");
String upwd = request.getParameter("upwd");
UsersDao ud=new UsersDao();
if(ud.login(uname, upwd)){
session.setAttribute("uname", uname);
request.getRequestDispatcher("main.jsp").forward(request, response);
}else{
out.print("登陆失败，即将跳回登陆页.....");
response.setHeader("refresh", "5;url=login.jsp");
}
%>
</body>
</html>
main.jsp
<%@ 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;
}
</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>
<%
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>" + list.get(i).getTitle() + "</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></tr>");
}
%>
</tr>
</table>
</body>
</html>
