Servlet Tutorial

Servlet is a Java web technology used to build dynamic web applications. It runs on a web container (like Tomcat) and handles client requests (browser/Postman) using the HTTP protocol. Servlets are mainly used for request processing, form handling, session management, and server-side business logic in Java web apps.

Key Features of Servlet

• Server-side Request Handling: Processes HTTP requests like GET, POST, PUT, DELETE.
• Platform Independent: Works on any OS with a supported servlet container.
• Fast and Scalable: Multithreaded by default, better than CGI.
• Session Management: Supports cookies, URL rewriting, and HttpSession.
• MVC Support: Works perfectly with JSP and frameworks like Spring MVC.

Servlet Basics

Covers the foundation of Servlet, including its introduction, architecture, lifecycle, and servlet container basics.

• Introduction
• Servlet Architecture
• Servlet Container (Tomcat)
• Request Flow (Client -> Server -> Servlet -> DB)
• Servlet Lifecycle
• ServletConfig and ServletContext
• doGet() and doPost()
• Servlet vs JSP
• Servlet vs CGI

Servlet Setup and First Program

Explains how to create and run a servlet project using Eclipse/IntelliJ, and configure it using web.xml or annotations.

• Create Servlet Project in Eclipse
• Configure Apache Tomcat
• First Servlet Program Example
• web.xml Configuration
• @WebServlet Annotation
• Deploy and Run on Server

Servlet Request and Response Handling

Covers how servlet receives client data and sends responses back to browser.

• HttpServletRequest
• HttpServletResponse
• GET vs POST Request
• Reading Form Data using getParameter()
• Servlet - Client HTTP Request
• Servlet - Response
• Servlet - Fetching Result
• Redirect vs Forward

Servlet Session Management

Introduces session handling concepts and methods used in real web applications.

• Introduction
• Session Tracking
• Session and Cookies in Servlet
• URL Rewriting
• Hidden Form Fields
• HttpSession
• Login Logout using Session
• Difference between Cookie and Session

Servlet Filters

Explains how filters work in real applications for validation, logging, and security.

• ServletFilter
• FilterConfig
• Authentication Filter Example
• Filter Chaining

Servlet Listeners & Exception Handling

Covers event-driven programming using listeners and proper exception handling techniques to build robust and error-resilient servlet applications.

• Event and Listener
• ServletContextListener
• HttpSessionListener
• Handling Exceptions in Servlet

Advanced Concepts

Covers database integration and advanced real-world features used in production-level servlet applications.

• JDBC Connection in Servlet
• Crud Operation
• File Upload using Servlet
• Download File using Servlet
• Pagination in Servlet

Servlet Interview Questions

Covers commonly asked interview questions on servlets to help in quick revision and interview preparation.

• Servlet Interview Questions