What is JavaServer Pages?
JavaServer Pages (JSP) is a technology for the development of web pages that supports dynamic content. This helps developers to insert Java code into HTML pages, making use of special JSP tags, most of which start with <% and end with%>.
A JavaServer Pages component is a type of Java servlet designed to fill the role of a user interface for a Java web application. Web developers record JSP as text files that combine HTML or XHTML code, XML elements and integrated JSP commands and actions.
Using JSP, you can collect information from users through Web forms, display records from a database or from another source and create Web pages dynamically.
JSP tags can be used for several purposes, such as retrieving information from a database or registering user preferences, accessing JavaBeans components, passing control between pages and sharing information between requests, pages, etc.
Why use the JSP?
JavaServer Pages generally serve the same purpose as the programs implemented using the gateway interface (CGI). But the JSP offers several advantages compared to the CGI.
- Performance is significantly better because the JSP allows dynamic elements to be incorporated into the HTML pages themselves, instead of having separate CGI files.
- The JSP is always compiled before being processed by the server, unlike CGI / Perl, which requires the server to load an interpreter and the destination script each time the page is requested.
- JavaServer Pages are built on the Java Servlets API, as well as the Servlets, the JSP also has access to all the powerful Enterprise Java APIs, including JDBC, JNDI, EJB, JAXP, etc.
- JSP pages can be used in combination with servlets that handle business logic, the model supported by the Java servlet model mechanisms.
Finally, the JSP is an integral part of Java EE, a complete platform for enterprise-class applications. This means that the JSP can play a role in the simplest applications for the most complex and demanding ones.
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Advantages of the JSP
The following table shows the other advantages of using the JSP in relation to other technologies –
vs.ASP pages (Active Server Pages)
The advantages of the JSP are two. First, the dynamic part is written in Java, not in Visual Basic or in another specific MS language, making it more powerful and easier to use. Second, it is portable for other operating systems and non-Microsoft Web servers.
It is more convenient to write (and modify!) Regular HTML than to have many println instructions that generate HTML.
vs.Server-Side Includes (SSI)
SSI is really intended only for simple inclusions, not “real” programs that use form data, make database connections and related.
Regular HTML, of course, cannot contain dynamic information.
Java Server Pages (JSP) is a server-side programming technology that allows the creation of a dynamic, platform-independent method for the creation of Web-based applications. JSP has access to the entire Java API family, JDBC API to access the corporate databases. This tutorial will teach you how to use Java Server Pages to develop your web applications in simple and easy steps.
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