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  Tutorial: Java JSP and Servlets Overview of Servlets and JSP Tutorial

This is an introductory tutorial on JSP an Servlet. Main topics include: What is a Java servlet?, What advantage does a Java servlet have over a traditional CGI program?, What is JSP?, and What are the Advantages of JSP?

Tutorial Details:

Java JSP and Servlets Overview of Servlets and JSP Tutorial
Servlet and JSP Training Courses On-site at your company or at public venues.
Note: Chapter 1 of Core Servlets and JavaServer Pages contains much more detailed and up to date information on this topic. The full text is now available online in PDF for free access.

1. What are Java Servlets? Servlets are Java technology's answer to CGI programming. They are programs that run on a Web server and build Web pages. The Web page is based on data submitted by the user. For example the results pages from search engines are generated this way, and programs that process orders for e-commerce sites do this as well. The data changes frequently. For example, a weather-report or news headlines page might build the page dynamically, perhaps returning a previously built page if it is still up to date.


2. What are the Advantage of Servlets Over "Traditional" CGI?
Java servlets are more efficient, easier to use, more powerful, more portable, and cheaper than traditional CGI and than many alternative CGI-like technologies. Efficient. With traditional CGI, a new process is started for each HTTP request. If the CGI program does a relatively fast operation, the overhead of starting the process can dominate the execution time. With servlets, the Java Virtual Machine stays up, and each request is handled by a lightweight Java thread, not a heavyweight operating system process.


 

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Java JSP and Servlets Overview of Servlets and JSP Tutorial

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