Servlets Listeners Introduction and Examples

Servlets Listeners

A Servlets Listener is a component in Java Servlet technology that allows you to monitor and respond to events occurring within a web application. It provides a way to initialize resources when the application starts, perform cleanup tasks when the application shuts down, and respond to changes in the application's lifecycle. 

Examples of Servlets Listeners:

• ServletContextListener: Handles application-level events.
• HttpSessionListener: Handles session-related events.
• ServletRequestListener: Handles request-related events.
• ServletContextAttributeListener: Handles changes to application-level attributes.
• HttpSessionAttributeListener: Handles changes to session-level attributes.

ServletRequestAttributeListener Introduction:

ServletRequestAttributeListener Demo:

HttpSessionAttributeListener Introduction:

HttpSessionAttributeListener Demo:

ServletContextAttributeListener Introduction:

ServletContextAttributeListener Demo:

ServletContextListener Introduction:

ServletContextListener Demo:

HttpSessionListener Introduction:

HttpSessionListener Demo:

HttpSession Listener Demo [Count logged in Users]:

ServletRequestListener Introduction:

ServletRequestListener Demo:

HttpSessionBindinglistener Introduction:

HttpSessionBindinglistener Demo:

HttpSessionActivationListener: