Servlet Filter - Redirect Session Timeout
Use the following to code to override the doFilter method, which redirects to login page on session timeout. The web.xml should be configured to use this filter.
ServletException
{
String ipAddress = request.getRemoteAddr();
System.out.println("IP " + ipAddress + ", Time " + new Date().toString());
boolean authorized = false;
String username = null;
String role = null;
if (request instanceof HttpServletRequest)
{
- Read more
- 2389 reads
-
Recursive Templates in Underscore Js
Use the following code to call a template recursively in Underscore JS.
This example use Backbone JS, JSTree(Jquery) to display tree nodes
<html lang="en">
<head>
<meta charset="utf-8">
<title>Tree Structure</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<meta name="author" content="">
<!-- Le styles -->
<link href="css/bootstrap.css" rel="stylesheet">
<link href="css/bootstrap-responsive.css" rel="stylesheet">
- Read more
- 3846 reads
-
Basic Example Using JPA
The following code example illustrates creating/upating database tables using JPA.
The two tables used are Employee and Department. When the main class EmpDAO is run the tables get created in the database and the table records can be queried using JPA API's. Hibernate has been used as implementation for JPA. The dependency jars are referred in the pom.xml.
Employee.java
import java.util.UUID;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.Temporal;
- Read more
- 3650 reads
-
Basic CSS3 Selectors Usage in HTML
The following code sample illustrates the CSS3 selectors/combinators usage in html documents.
<html>
<style>
section > hgroup{color:#0FFFF}
#form1{margin:20px;font-size:30px;width:300px;border:5px solid green;padding-left:20px}
label:hover {color:red}
p{border:10px solid black}
form:hover {color:blue;font-weight:bold}
b{text-decoration:underline;text-shadow:2px 2px 2px gray,0 0 10px red;
font-weight:bold}
label label{font-size:20cm}
</style>
<body>
<section>
<hgroup>
<h1>Demo</h1>
<p><b>Registration</b></br></br>
- Read more
- 1639 reads
-
How to Auto refresh DIV content in jsp?
Use the following code to auto refresh DIV content in jsp page.
<html>
<script language="javascript">
var delay = 10000;
var autoRefreshContent = setInterval(
function ()
{
var url = "<c:url value='/tdd/content.htm'> </c:url>";
url = url +"?sId="+Math.random();
$('#contentDiv').load(url).fadeIn("slow");
}, delay);
</script>
<body>
<div id="contentDiv" >
<%@ include file="content.jsp"%>
</div>
</body>
</html>
Web Application Auto Login
In general, every web application will have an authentication mechanism, to authenticate the users accessing the web application.
Suppose if there is a requirement to autologin to a web application from a given page, use the following code.
<head>
</head>
<script type="text/javascript">
function autoLogin()
{
var xmlhttp;
alert('loadXMLDoc');
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
- Read more
- 5755 reads
-
jquery - highlight table cells
<head>
<script type="text/javascript" src="jquery.js"></script>
</head>
<style type="text/css">
.highlight{
color:white;
background-color:black;
cursor: pointer;
}
</style>
<table id="example" border='1'>
<thead>
<tr>
<td>First Name</td>
<td>Last Name</td>
<td>Email</td>
</tr>
</thead>
<tbody>
<tr onclick="alert('John Smith')">
<td>John</td>
<td>Smith</td>
<td>John.Smith@gmail.com</td>
- Read more
- 2177 reads
-
jQuery Date Picker - Display Date range fields
The following is a JSP code to display date range fields using jQuery.
pageEncoding="ISO-8859-1"%>
<html>
<head>
<script type="text/javascript" src="<c:url value='/jquery/jquery-1.6.1.min.js'/>"></script>
<script type="text/javascript" src="<c:url value='/jquery/jquery-ui-1.8.15.custom.min.js'/>"></script>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>jQuery Date Picker Example</title>
<script type="text/javascript">
$(function() {
- Read more
- 3034 reads
-
Jsp Logout page template
Here is a simple JSP logout page template which can be used in Java based web applications.
It just invalidates the current user session and redirects to login page.
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!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=ISO-8859-1">
<title>Logout</title>
</head>
- Read more
- 2588 reads
-
Java - Send HTTP Post Request
Use the following code to send Http Post request to any URL from Java.
{
public HttpURLConnection getHTTPConnection(String sendUrl)
{
URL url = null;
HttpURLConnection urlConn = null;
try
{
url = new URL(sendUrl);
urlConn = (HttpURLConnection) url.openConnection();
urlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
urlConn.addRequestProperty("User-Agent", "TDD");
urlConn.setUseCaches(false);
urlConn.setReadTimeout(5000);
urlConn.setConnectTimeout(5000);
- Read more
- 2681 reads
-