Java Servlet and CGI-Programming (1).pptx

Java Servlet and CGI-Programming (1).pptx

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  Java Servlet and CGI Programming NADARSARASWATHI COLLEGE OF ARTS AND SCIENCE ADVANCED JAVA PROGRAMMING PRESENTED BY, ABINAYASRI S I M. SC. COMPUTER SCIENCE
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  Java Servlet andCGI Programming Java Servlets and CGI (Common Gateway Interface) are two distinct technologies used for server-side programming. This presentation will explore the key differences, advantages, and best practices for each approach in web application development. by Varshini Ramar
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  Introduction to Servlet Technology Whatare Java Servlets? Java Servlets are server-side Java components that handle HTTP requests and generate dynamic web content. Advantages of Servlets Servlets offer improved performance, scalability, and integration with the Java ecosystem. Servlet Containers Servlet containers, such as Tomcat, provide a runtime environment and manage the servlet lifecycle. Servlet API The Servlet API provides a standard interface for developing and deploying servlets.
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  Servlet Life Cycleand Servlet API 1 Initialization The servlet is loaded and initialized by the servlet container. 2 Request Handling The servlet processes incoming HTTP requests and generates responses. 3 Destruction The servlet is removed from the servlet container and its resources are released.
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  Handling HTTP Requestsand Responses Request Handling Servlets can access and manipulate request parameters, headers, and other HTTP data. Response Generation Servlets can set response headers, send output, and control the HTTP status code. Input/Output Handling Servlets can read and write data using input/output streams and readers/writers.
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  Servlet Configuration andDeployment 1 Deployment Descriptors Servlets are configured using XML-based deployment descriptors, such as web.xml. 2 Servlet Mapping URL patterns are used to map client requests to specific servlet instances. 3 Deployment Process Servlets are packaged into web archives (WAR files) and deployed to a servlet container.
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  Session Management inServlets Cookies Servlets can use cookies to track client sessions and maintain state. HTTP Sessions Servlets can create and manage HTTP sessions to store and retrieve data. URL Rewriting Servlets can use URL rewriting to maintain session state without cookies.
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  Common Servlet DesignPatterns Front Controller A single servlet handles all incoming requests and delegates to other components. Intercepting Filter Filters can pre-process or post- process requests and responses. Service Delegate Servlets delegate business logic to separate service components.
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  Comparison of Servletsand CGI Programming Servlets CGI Java-based, integrated with the Java ecosystem Language-agnostic, can use any programming language Optimized for performance and scalability Can have higher overhead and performance limitations Managed by a servlet container, with lifecycle management Executed as separate processes, without lifecycle management
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  Conclusion and BestPractices 1 Leverage Servlet Advantages Use servlets to benefit from their performance, scalability, and Java ecosystem integration. 2 Adhere to Servlet Lifecycle Understand and properly manage the servlet lifecycle for optimal resource utilization. 3 Adopt Design Patterns Apply common servlet design patterns to create modular, maintainable, and extensible web applications.
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  THANK YOU!