husted 2002/06/27 04:50:35
Added: doc/userGuide technologies.xml
Log:
Start of a "Core Technologies" page. Work in progress.
Revision Changes Path
1.1 jakarta-struts/doc/userGuide/technologies.xml
Index: technologies.xml
===================================================================
<?xml version="1.0"?>
<document url="./technologies.xml">
<properties>
<author>Ted Husted</author>
<author>Ed Burns</author>
<title>The Struts User's Guide - Enabling Technologies</title>
</properties>
<body>
<chapter name="0. Core Technologies">
<section name="0.1 The Usual Suspects" href="prereqs">
<p>
This User Guide is written for active Web developers and assumes a working
knowledge about how Java Web applications work. Before getting started, you
should
understand the basics of several core technologies:
</p>
<ul>
<li><a href="#http">HTTP and HTML and User Agents</a></li>
<li><a href="#cycle">HTTP Request/Response Cycle</a></li>
<li><a href="#servlets">Java Servlets</a></li>
<li><a href="http://java.sun.com/products/javabeans/";>JavaBeans</a></li>
<li><a
href="http://java.sun.com/docs/books/tutorial/essential/attributes/properties.html";>Properties</a>
files and
<a
href="http://java.sun.com/docs/books/tutorial/i18n/resbundle/concept.html";>ResourceBundles</a></li>
<li><a href="http://java.sun.com/products/jsp/product.html";>JavaServer Pages
(JSP)</a></li>.
<li><a href="http://java.sun.com/products/jsp/taglibraries.html";>Custom
Tags</a></li>
<li><a href="http://www.w3.org/XML/";>Extensible Markup Language</a></li>
</ul>
<p>This chapter briefly defines each of these technologies, but does not
describe them in
detail. For your convenience, links to further information about each component
are also
provided.</p>
<p>If you are not already familiar with these technologies, the best overall
starting point is
<a href="http://java.sun.com/webservices/docs/1.0/tutorial/index.html";><b>The
Java Web Services Tutorial</b></a>
for the Java Web Services Developer Pack. This is also available for download as
a
<a
href="http://java.sun.com/webservices/docs/1.0/tutorial/doc/JavaWSTutorial.pdf";>PDF</a>.
</p>
<p>If you've created Web applications on other platforms, you may be able to
follow along
and visit the other references as needed. The core technologies used by Struts
are
also used by most other Java Web development products, so the background
information is
useful in any event.
</p>
</section>
<section name="0.2 HTTP, HTML and User Agents" href="http">
<p>The World Wide Web was built over the Hypertext Transfer Protocol
(<a href="http://www.ietf.org/rfc/rfc2616.txt?number=2616";>HTTP</a>) and
Hypertext Markup Language
(<a href="http://www.w3.org/MarkUp/";>HTML</a>). A User Agent, like a web
browser, uses HTTP to request
a HTML document. The browser then formats and displays the document to its
user. HTTP is used to
transport more than HTML, but HTML is the linga franca of the Web and web
applications. </p>
<p>Some Java engineers working on Web applications also write their own HTML.
Others leave that to the
page designers.</p>
<p>For more about HTTP, HTML, and User Agents, see:</p>
<ul>
<li><a href="http://www.w3.org/MarkUp/Guide/";>Getting started with HTML</a> by
Dave Raggett</li>
<li><a
href="http://java.sun.com/webservices/docs/1.0/tutorial/doc/HTTP.html#63796";>
HTTP Overview</a> in the Java Web Services Tutorial
(<a
href="http://java.sun.com/webservices/docs/1.0/tutorial/index.html";>JWST</a>).</li>
</ul>
</section>
<section name="0.3 The HTTP Request/Response cycle" href="cycle">
<p>A very important part of HTTP for the web developer is the request/response
cycle. To use HTTP
you have to make a request. A HTTP server, like a web server, is then obliged to
respond. When you
build your web application, you design it to react to a HTTP request by
returning a HTTP response.
Frameworks like Struts abstract much of these nuts and bolts, but it is
important to understand
what is happening behind the scenes. </p>
<p>If you are not familiar with the HTTP Request/Response cycle, we
<b>strongly</b> recommend the
<a href="http://java.sun.com/webservices/docs/1.0/tutorial/doc/HTTP.html#63796";>
HTTP Overview</a> in the JWST.
</p>
</section>
<section name="0.4 Java Servlets" href="servlets">
<p>Many of the aforementioned nuts-and-bolts are handled by Sun's
<a href="http://java.sun.com/products/servlet/";>Java Servlet</a> platform. This
casts HTTP
into a much more object-orientated form so that developers can better
concentrate what
they need their application to do -- rather than the mechanics of HTTP.</p>
<p>Struts provides a ready-to-use servlet for your application. As a Struts
developer, you
can then just write objects that the Struts servlet calls when needed. But it is
still
helpful to understand the basics of what servlets are and the role they play in
a Java
Web application.</p>
<p>For more about Java Servlets, see </p>
<ul>
<li><a href="http://java.sun.com/products/servlet/";>The Java Servlet product
page</a></li>
<li><a href="Java Servlet Technology ">Java Servlet Technology</a> in the
JWST.</li>
</ul>
</section>
<section name="0.5 JavaBeans" href="bean">
<p>:TODO:</p>
<p align="center">
Next: <a href="introduction.html">Introduction</a>
</p>
</section>
</chapter>
</body>
</document>
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