This tutorial will teach you how to make a Automatic Logout after 30 minutes Inactivity using Jsp.When the user doesn’t log out the system that might be a problem. Any one can see the records of the system, it is not safe now a days every person leaves the mistakes when the works is busy. So that I did this system which help you in the future. If the user not access the system for 30 mins it will automatically log out.
First you have to create the login.jsp page and paste the code
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
<style type="text/css">
body,td,th{
color: #000000;
}
body{
background-color: #F0F0F0;
}
.style1
{
font-family: arial;
font-size: 14px;
padding: 12px;
line-height: 25px;
border-radius: 4px;
text-decoration: none;
}
.style2
{
font-family: arial;
font-size: 17px;
padding: 12px;
line-height: 25px;
border-radius: 4px;
text-decoration: none;
}
</style>
</head>
<body>
<div class="container">
<table width="100%" height="100%" border="0" cellpadding="0" align="center">
<tr>
<td align="center" valign="middle">
<table class="table-bordered" width="350" border="0" cellpadding="3"cellspacing="3" bgcolor="#FFFFFF">
<Form name="frm-login" id="frm-login">
<tr>
<td height="25" colspan="2" align="left" valign="middle" bgcolor="#FF9900" class="style2">
<div align="center">
<strong>Login</strong>
</div>
</td>
</tr>
<tr>
<div id="err" style="color:red">
</div>
</tr>
<tr>
<td width="118px" align="left" valign="middle" class="style1">
Username
</td>
<td width="118px" align="left" valign="middle" class="style1">
<input type="text" class="form-control" size="10px" id="username" placeholder="Username" name="username">
</td>
</tr>
<tr>
<td width="118px" align="left" valign="middle" class="style1">
Password
</td>
<td width="118px" align="left" valign="middle" class="style1">
<input type="password" class="form-control" size="10px" id="password" placeholder="Password" name="password">
</td>
</tr>
<tr>
<td colspan="2" valign="middle" class="style1" align="right">
<button type="button" class="btn btn-primary" onclick="login()">Sign In</button>
<button type="button" class="btn btn-warning" onclick="reset()">Reset</button>
</td>
</tr>
</Form>
</table>
</td>
</tr>
</table>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
var msg = null;
function login()
{
if($('#username').val()== "")
{
$('#username').parent('td').addClass('has-error');
return false;
}
else if($('#password').val()== "")
{
$('#password').parent('td').addClass('has-error');
return false;
}
var data = $("#frm-login").serialize();
$.ajax({
type : 'POST',
url : 'validatelogin',
data : data,
dataType : 'JSON',
success:function(data)
{
msg = data[0].msg
if(msg == 1)
{
window.location.replace("index.jsp");
}
else if(msg == 3)
{
$("#err").hide().html("UserName or Password DO not Match").fadeIn('slow');
}
}
});
}
</script>
</body>
</html>
after that have to create the index.jsp page and paste the code
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1><%=session.getAttribute("username") %> </h1>
<p><a href="logout.jsp">logout</a></p>
</body>
</html>
after that have to create the logout.jsp page and paste the code
<%
session.invalidate();
response.sendRedirect(request.getContextPath() + "/login.jsp");
%>
inside the source package have to create the validatelogin.java page
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
@WebServlet("/validatelogin")
public class validatelogin extends HttpServlet {
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out = response.getWriter();
Connection con;
PreparedStatement pst;
ResultSet rs;
JSONArray list = new JSONArray();
String username = request.getParameter("username");
String password = request.getParameter("password");
JSONObject obj = new JSONObject();
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost/loginjsp", "root","");
pst = con.prepareStatement("select id,username,password from login where username = ? and password = ?");
pst.setString(1, username);
pst.setString(2, password);
rs = pst.executeQuery();
String msg;
HttpSession session = request.getSession();
if(rs.next())
{
session.setAttribute("username", username);
session.setAttribute("password", password);
session.setMaxInactiveInterval(30);
msg = "1";
obj.put("msg", msg);
list.add(obj);
out.println(list.toJSONString());
out.flush();
}
else
{
msg = "3";
obj.put("msg", msg);
list.add(obj);
out.println(list.toJSONString());
out.flush();
}
} catch (ClassNotFoundException ex) {
Logger.getLogger(validatelogin.class.getName()).log(Level.SEVERE, null, ex);
} catch (SQLException ex) {
Logger.getLogger(validatelogin.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
i have attached the video link below. which will do this tutorials step by step.