Java-Servlets

A Servlet an application that runs in a Web server or application server and provides server-side processing such as accessing a database. Servlet can be created either by implementing Servlet Interface or extending abstract classe (GenericServlet or HttpServlet)

Getting Started

These instructions will help you a copy of the project up and running on your local machine for development and testing purposes.

Prerequisites

• Eclipse IDE
• Java 1.7+ Version

Deployment

Clone this repository and run each examples.

Servlet Terminology

• Http (Hypertext Transfer Protocol): It's a stateless request-response based communication protocol.
• Client: A Client is any machine that requests information.
• Webserver: Web Server takes client Request and send requested resource back to the Client.
• Servlet: It is a small Java program runs within a Web Server (usually across Http).
• Web Container: Runtime environment for Servlets, manages life cycle of servlet.

Methods

Methods	Description
public void init(ServletConfig config)	initializes the servlet. It is the life cycle method of servlet and invoked by the web container only once.
public void service(ServletRequest request,ServletResponse response)	provides response for the incoming request. It is invoked at each request by the web container.
public void destroy()	is invoked only once and indicates that servlet is being destroyed.
public ServletConfig getServletConfig()	returns the object of ServletConfig
public String getServletInfo()	returns information about servlet such as writer, copyright, version etc.

Servlet API

javax.servlet

Interfaces

• RequestDispatcher
• Servlet
• ServletConfig
• ServletContext
• ServletRequest
• ServletResponse
• SingleThreadModel

Classes

• GenericServlet
• ServletInputStream
• ServletOutputStream

Exception Classes

• ServletException
• UnavailableException

javax.servlet.http

Interfaces

• HttpServletRequest
• HttpServletResponse
• HttpSession
• HttpSessionBindingListener
• HttpSessionContext

Classes

• Cookie
• HttpServlet
• HttpSessionBindingEvent
• HttpUtils

Examples

This repository explains following examples:

• Basic-Servlets-Examples
• Servlet-ConfigParams-Example
• Servlets-ReqDispatcher-Example
• Servlets-SendRedirect-Example
• Servlets-SessionTracking-Example

Authors

• Suneet Patil

License

This project is licensed under the MIT License - see the LICENSE file for details