JSP Introduction

To allow server side development JSP was developed by Sun Microsystem. Typical different clients connecting via the Internet to a Web server. e.g. a well popular Apache Web server is execute on Unix platform.

C and Perl are languages which used on web servers to provide dynamic content. Most languages including Visualbasic,Delphi,C and Java could be used to write application that provided dynamic content using data from database requests. These were known as CGI server side applications. Microsoft developed ASP to allow HTML developers to easily provide dynamic content supported as standard by Microsoft free Web Server called Internet Information Server (IIS). A comparison of ASP and JSP will be given in section below.

JSP source code runs on the web server via JSP Servlet Engine.
JSP files are HTML files with special Tags
containing Java source code that provide the dynamic content.

Why we used JSP?

JSP allow developer to quickly produce web sites and applications in an open and standard way and it is easy to learn. JSP is Java based an object-oriented language and offers a robust platform for web development

Reason to use JSP:

Reusability of Components by using Javabeans and EJB.
Multi platform
Platform-Independent

So you are never depend on one vendor or platform.

HTML and graphics displayed on the web browser are the presentation layer and the Java code (JSP) on the server is classed as the implementation.

Due to the separation of presentation and implementation,web designers work only on the presentation and Java developers concentrate on implementing the application.

Comparison of JSP with ASP,ASP.NET and Servlet

Comparison with ASP

JSP and ASP provide fairly similar functionality.

Both allow embedded code in an HTML page,session variables and database access and manipulation.
ASP is mostly found on Microsoft platform but JSP can operate on any platform that conforms to the J2EE specification.
JSP allow reusubility of component by using Javabeans and EJBs but ASP provides the use of COM / ActiveX controls.

Comparison with ASP.NET

ASP.NET is based on the Microsoft .NET framework. By using .NET framework you developed application with different programming language like Visual Basic,C# and JavaScript. JSP and Java still has the advantage that it is supported on many different platforms and the Java community has many years of experience in designing and developing Enterprise quality scalable applications. ASP.NET is quite an improvement over the old ASP code.

Comparison with Servlets

A Servlet is a Java class that provides special server side service. It is tough to write HTML code in Servlets. In Servlets you need to have lots of println statements to create HTML. JSP pages are converted to Servlets so actually can do the same thing as old Java Servlets.

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