Hey guys in this article, you will learn everything you need to know about Sessions in JSP with full code example.
Read More:
- Check the Complete Spring MVC Tutorials
- Check the Complete JSP Tutorials
- Check the Complete Spring Boot Tutorials [100+ Examples]
- Check the Complete Spring Boot and Thymeleaf Tutorial
- Check the Complete AWS Tutorial
- Check the Complete JavaServer Faces (JSF) Tutorial
- Check the Complete Spring Data JPA Tutorial
- Check the Complete Spring Security Tutorial
- Check the Javascript Projects for Beginners
- Check the Spring Boot JdbcTemplate Tutorials
Table of Contents
Overview
- JSP session is created once for user’s browser session.
- It is unique for each user
- It is commonly used when you need to keep track of user’s actions
Add data to the session object
session.setAttribute(name, value);
Example:
Set<String> todos = new HashSet<String>();
session.setAttribute("todos", todos);
Retrieve data from session object
Object session.getAttribute(name);
Example:
Set<String> todos = (Set<String>) session.getAttribute("todos");
Complete Example
Follow the below steps to understand the complete example
Create a Project
You can check the following post to create a new Dynamic Web Project
Create a JSP file
Create SessionDemo.jsp
file under WebContent and add the following content
<%@page import="java.util.HashSet"%>
<%@page import="java.util.Set"%>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="SessionDemo.jsp">
Add New Todo: <input type = "text" name="todo" />
<input type = "submit" value="Submit" />
</form>
<%
Set<String> todos = (Set<String>) session.getAttribute("todos");
if(todos == null) {
todos = new HashSet<String>();
session.setAttribute("todos", todos);
}
String todo = request.getParameter("todo");
if(todo != null) {
todos.add(todo);
}
%>
<br/><br/>
<b>My upcoming todos:</b>
<ol>
<%
for(String temp : todos) {
out.println("<li>"+temp+"</li>");
}
%>
</ol>
</body>
</html>
Run the file
Right click on the File, choose Run As, choose Run on Server. It will open in a default web browser, you will see the following content
That’s it for this post, if you like this post, please share this post with your friends and collogues and also share this on your social media profiles.