JSP Tutorial


  • By this tutorial,we can learn What is JSP , why use JSP , Advantages of JSP

  • Introduction

       
    • JSP Stands for Java Server Pages. JSP is an alternative technology for Servlet.
    • A JSP page consists of HTML tags and JSP tags. It provides some additional features such as Expression Language, Custom Tag etc.
    • Servlet can be viewed as "HTML inside Java", which is better for implementing business logic - as it is Java dominant. JSP, on the other hand, is "Java inside HTML", which is superior for creating presentation - as it is HTML dominant.
    • In a typical Model-View-Control (MVC) application, Servlet are often used for the Controller (C), which involves complex programming logic. JSPs are often used for the View (V), which mainly deals with presentation.

    Advantages of JSP

       
    • Separation of static and dynamic contents: The dynamic contents are generated via programming logic and inserted into the static template. This greatly simplifies the creation and maintenance of web contents.
    • Extension to Servlet: JSP technology is the extension to Servlet technology. We can use all the features of Servlet in JSP. In addition to, we can use implicit objects, predefined tags, expression language and Custom tags in JSP that makes JSP development easy.
    • Minimize or reduce maintenance and deployment problems: maintenance is easy because business logic is separated from presentation logic. Secondly, If JSP page is modified, we don't need to recompile and redeploy the project. The Servlet code needs to be updated and recompiled if we have to change the look and feel of the application.

    Difference between JSP and Servlet

    Servlet

    1. A Servlet is a server-side program
    2. Executes inside a Web server, such as Tomcat.
    3. Receives HTTP requests from users and provides HTTP responses
    4. Written in Java, with a few additional APIs specific to this kind of processing
    5. In MVC architecture Servlet acts as controller.

    JSP

    1. JSP is an interface on top of Servlets
    2. A JSP program is compiled into a Java Servlet before execution
    3. Easier to write than Servlet as it is similar to HTML.
    4. Can make use of JavaBeans also.
    5. In MVC architecture JSP acts as view.

     

     

     


     

     

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