What session management? Write a servlet program to demonstrate the use of HttpSession and its methods setAttribute and getAttribute

Session management is a crucial aspect of web development, especially when it comes to maintaining state across multiple requests from the same client. It allows web applications to remember users and their interactions with the site, enabling features such as shopping carts, user authentication, and personalization. In Java web development, session management is often facilitated through the use of HttpSession.

An HttpSession object represents a user session in a Java web application. It provides a way to store information between HTTP requests from the same client. This information is stored on the server side, typically in memory or in a database, and is associated with a unique session ID. HttpSession objects are created automatically by the servlet container (e.g., Tomcat, Jetty) when a user accesses a web application for the first time, and a session is maintained until it expires or is invalidated.

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