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>

<%@ 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>

posted @ 2022-05-11 13:36 Y6 阅读(71) 评论(0) 收藏举报

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JSP第十一周作业

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