December 2000
Intermediate to advanced
574 pages
17h 3m
English
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Why Use JSP?
In the early days of the Web, the Common Gateway Interface (CGI) was the only tool for developing dynamic web content. However, CGI is not an efficient solution. For every request that comes in, the web server has to create a new operating system process, load an interpreter and a script, execute the script, and then tear it all down again. This is very taxing for the server and doesn’t scale well when the amount of traffic increases.
Numerous CGI alternatives and enhancements, such as
FastCGI,
mod_ perl
from Apache, NSAPI from Netscape,
ISAPI
from Microsoft, and
Java Servlets from Sun Microsystems,
have been created over the years. While these solutions offer better
performance and scalability, all of these technologies suffer from a
common problem: they generate web pages by embedding
HTML directly in programming
language code. This pushes the creation of dynamic web pages
exclusively into the realm of programmers. JavaServer Pages, however,
changes all that.
Embedding Elements in HTML Pages
JSP tackles the problem from the other direction. Instead of embedding HTML in programming code, JSP lets you embed specialized code (sometimes called scripting code) into HTML pages. Java is the default scripting language of JSP, but the JSP specification allows for other languages as well, such as JavaScript, Perl, and VBScript. We will begin looking at all the JSP elements in detail later, but at this point let’s introduce you to a simple JSP page:
<html> <body bgcolor="white"> ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.