JSP stands for JavaServer Pages. JSP is one of the most powerful, easy-to-use and fundamental technology for Java web developers. JSP combines HTML, XML, Java Servlet and JavaBeans technologies into one highly productive technology to allow web developers to develop reliable, high performance and platform independent web applications and dynamic websites.
JSP Advantages
Separate the business logic and presentation: The logic to generate dynamic elements or content is implemented and encapsulated by using JavaBeans components. The user interface (UI) is created by using special JSP tags. This allows developers and web designers to maintain the JSP pages easily.
Write Once, Run Anywhere: as a part of Java technology, JPS allows developers to developer JSP pages and deploy them in a variety of platforms, across the web servers without rewriting or changes.
Dynamic elements or content produced in JSP can be served in a different formats: With JSP you can write web application for web browser serving HTML format. You can even produce WML format to serve hand-held device browsers. There is no limitation of content format which JSP provides.
Take advantages of Servlet API: JSP technically is a high-level abstraction of Java Servlets. It is now easier to get anything you've done with Servlet by using JSP. Beside that you can also reuse all of your Servlets you've developed so far in the new JSP.
source: jsptutorial.net
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