The destroy() method runs only once during the lifetime of a Servlet and signals the end of the Servlet instance. Then, servlet calls service() method to process a client’s request and is invoked to inform the Servlet about the client requests.įinally, a servlet is terminated by calling the destroy(). Servlet.init() method is called by the Servlet container to notify that this Servlet instance is instantiated successfully and is about to put into service. Next, a servlet is initialized by calling the init () method. When a server starts up, the servlet container deploy and loads all the servlets. Servlet Life Cycle: The Servlet life cycle mainly goes through four stages: The entire life cycle of a servlet is managed by the Servlet container which uses the interface to understand the Servlet object and manage it. Now, let’s jump into the next concept and understand Servlet Life Cycle. In this figure you can see, a client sends a request to the server and the server generates the response, analyses it and sends the response back to the client. Servlets can respond to any type of request, and they are commonly used to extend the applications hosted by web servers. Servlet is a server-side Java program module that handles client requests and implements the servlet interface. Now let’s dive deep into Servlets and understand its working mechanism. Here, the client sends an HTTP request and the server answers with an HTML page to the client, using HTTP. And this mechanism allows more users to connect to a given server over a period of time. With HTTP the clients connect to the server to send one request and then disconnect. It is considered as a stateless protocol because it supports only one request per connection. HTTP is used by clients and servers to communicate on the web. So, what is the link between the Web and HTTP? Let’s now find out. Google, Facebook, Twitter are examples of web applications. And, the Web application is a website with dynamic functionality on the server. web pages like HTML pages, images, graphics etc. So, a website is a collection of static files i.e. Now that we know what is web, let’s move further and understand what is a website. Web is a system of Internet servers that supports formatted documents. The documents are formatted using a markup language called HTML ( HyperText Markup Language) that supports links to other documents like graphics, audio, and video files etc. This Edureka tutorial on “Servlet and JSP tutorial” will talk the fundamental concepts of servlets and JSP, its life cycle and various steps to create Servlet and Java Server Pages.
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