Overview

• HTTP Protocol: Stateless by nature
• State Management: Maintaining client information across requests
• Purpose: Track user data, preferences, and application state

State Management Approaches

Client-Side State Management

1. Cookie
2. QueryString
3. Hidden Form Fields
4. HTML5 Storage (SessionStorage and LocalStorage)

Server-Side State Management

1. HttpSession
2. ServletContext (Application)
3. ServletRequest

Client-Side State Management

1. Cookies

Definition: Text information in key-value pairs maintained at client browser

Creating and Sending Cookies

// Create cookie
Cookie c = new Cookie("key", "value");
resp.addCookie(c);

Receiving Cookies from Client