Servelts Jsp By Sai Butchi
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The document discusses Servlets and JSPs. It explains that clients and servers communicate via HTTP, with the server collecting requests, processing them, and returning responses. Servlets are helper applications that allow servers to process dynamic pages and save data to databases, since servers cannot do this directly. JSPs are dynamic pages that use Java code. The document aims to provide an overview of how clients and servers interact through Servlets and JSPs.
Servelts Jsp By Sai Butchi
- 1. Understanding Servlet and JSP By SaiButchiBabuManepalli www.msnvbbabu.blogspot.com FB.com/IdeaForAnyProblem 1
- 2. Introduction: This chapter gives you an overview of Servlets and JSP’s and the interaction between the Client and the Server. 2 Sai NagaVenkata BuchiBabu Manepalli msnvbbabu.blogspot.com FB.com/IdeaForAnyProblem
- 3. Objective: After completing this chapter you will be able to: ◦ Know the functions of web server and clients ◦ Explain how clients and servers interact ◦ Define the simple request/response sequence of HTTP ◦ Explain and explore the usage of Servlets and JSPs 3 Sai NagaVenkata BuchiBabu Manepalli msnvbbabu.blogspot.com FB.com/IdeaForAnyProblem
- 4. Web Server collects the request from the client, processes them and generates a response which has to be given back to the client Client lets the user send request and shows the result of the request. Clients and server communicates through HTML and HTTP HTTP is the language/protocol that clients and servers use to communicate Browser understand the HTML and generates the GUI accordingly 4 Sai NagaVenkata BuchiBabu Manepalli msnvbbabu.blogspot.com FB.com/IdeaForAnyProblem
- 6. Initially the user requests for a resource by typing the URL in the browser. Web browser send the request containing header information to the server Server searches for the requested resource. The resource can be an HTML file, pdf file The server sends the found resource to the web browser The Web browser interprets the HTML text and converts it into GUI and displays it to the user 6 Sai NagaVenkata BuchiBabu Manepalli msnvbbabu.blogspot.com FB.com/IdeaForAnyProblem
- 8. Web server has the following limitations: ◦ Cannot serve request for dynamic pages directly ◦ Cannot be used to save data into a database or file How to overcome these server issues ? Web Server makes use of helper application to serve issues like dynamic content, save data into Database Helper application can be CGI (Common Gateway Interface), Servlets The helper applications like Servlets does the computation job for the web server and returns the result back to the Web server The dynamic page that uses Java code is called JSP (Java Server Pages) 8 Sai NagaVenkata BuchiBabu Manepalli msnvbbabu.blogspot.com FB.com/IdeaForAnyProblem
- 9. 9 SERVLET 2. Web Server uses the Servlet for help regarding preparation of dynamic data 1. Request the Web server to display a dynamic page 3. Populates the page with dynamic data and sends it to the Web server as if it is a static page 4. The page is given to the browser for display Sai NagaVenkata BuchiBabu Manepalli msnvbbabu.blogspot.com FB.com/IdeaForAnyProblem
- 10. 1. The language/protocol that clients and servers use to communicate: a) TCP b) IP c) HTTP d) WAP 10 Sai NagaVenkata BuchiBabu Manepalli msnvbbabu.blogspot.com FB.com/IdeaForAnyProblem
- 11. Web Server collects the request from the client, processes them and generates a response which has to be given back to the client. Clients and server communicates through HTML and HTTP. Web Server makes use of an helper application like Servlets to process the request for dynamic Web pages or to save data in the database. JSPs are dynamic pages that can make use of java code. 11Sai NagaVenkata BuchiBabu Manepalli msnvbbabu.blogspot.com FB.com/IdeaForAnyProblem
- 12. Reference books: ◦ Head First Servlet and JSP ◦ SCWCD Exam Kit –Hanumanth deshmukh Reference Web Site: ◦ http://www.coreservlets.com ◦ http://javapassion.com ◦ http://www.javaranch.com 12 Sai NagaVenkata BuchiBabu Manepalli msnvbbabu.blogspot.com FB.com/IdeaForAnyProblem