What is ServletContextListener?

ServletContextListener is an interface that gets notified about ServletContext lifecycle changes. It offers two methods. contextInitialized – Is triggered when the web application is starting the initialization. This will be invoked before any of the filters and servlets are initialized.

How do you deploy a web application listener within a web application?

Manage database connections when a Web Application is deployed or shuts down. Create counters. Monitor the state of HTTP sessions and their attributes….To configure an event listener:

  1. Open the web.
  2. Add an event declaration using the element.
  3. Write and deploy the Listener class.

What is the use of listener class in Web XML?

This element registers a listener with the Web container. The data provided between the tags is the fully qualified class name for the listener class. The class must implement one or more interfaces from the javax. servlet API, and also have a public constructor that takes no arguments.

Which of the following are the methods defined in ServletContextListener interface?

There are two methods declared in the ServletContextListener interface which must be implemented by the servlet programmer to perform some action such as creating database connection etc. public void contextInitialized(ServletContextEvent e): is invoked when application is deployed on the server.

What does Getervletcontext return?

getServletContext() method of ServletConfig interface returns the object of ServletContext. getServletContext() method of GenericServlet class returns the object of ServletContext.

Is servlet still used?

yes many company uses servlet and jsp for web application development in java. Though not directly but servlet are still in use as most of the Java based web frameworks use them down below.

Is it worth learning jsp and servlets?

Yes, you should learn servlets and jsp before spring and hibernate. Servlets and jsp is the base for web development in Java.

What is the difference between Web App and web application?

Web Application: Web application is a piece of software that can be accessed by the browser. A Browser is an application that is used to browse the internet….Difference Between Web application and Website.

Web Application Website
Web application is designed for interaction with end users. Website basically contains static content.

What are the three types of Web application?

Here are five different types of web apps, with each of their own characteristics.

  • Static web application.
  • Dynamic web application.
  • E-commerce.
  • Portal web app.
  • Content Management System (CMS)

What is a listener function?

An event listener is a procedure or function in a computer program that waits for an event to occur. Examples of an event are the user clicking or moving the mouse, pressing a key on the keyboard, disk I/O, network activity, or an internal timer or interrupt.

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