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-<!--Arbortext, Inc., 1988-2006, v.4002-->
-<!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN"
- "concept.dtd">
-<concept id="cwservbn" xml:lang="en-us">
-<title>Servlets</title>
-<prolog><metadata>
-<keywords><indexterm>servlets<indexterm>overview</indexterm></indexterm><indexterm>Web
-servers<indexterm>generating dynamic content</indexterm></indexterm></keywords>
-</metadata></prolog>
-<conbody>
-<p>Servlets are server-side <tm tmclass="special" tmowner="Sun Microsystems, Inc."
-tmtype="tm" trademark="Java">Java</tm> programs that use the <cite>Sun Microsystems <tm
-tmclass="special" tmowner="Sun Microsystems, Inc." tmtype="tm" trademark="Java">Java</tm> Servlet
-API</cite> and its associated classes and methods, as defined in the <cite>Sun
-Microsystems <tm tmclass="special" tmowner="Sun Microsystems, Inc." tmtype="tm"
-trademark="Java">Java</tm> Servlet 2.3 Specification</cite>. These <tm tmclass="special"
-tmowner="Sun Microsystems, Inc." tmtype="tm" trademark="Java">Java</tm> programs
-extend the functionality of a Web server by generating dynamic content and
-responding to Web client requests. When a browser sends a request to the server,
-the server can send the request information to a servlet, so that the servlet
-can construct the response that is sent back to the browser.</p>
-<p>Just as applets run on a Web browser and extend the browser's capabilities,
-servlets run on a Java-enabled Web server and extend the server's capabilities.
-Because of their flexibility and scalability, servlets are commonly used to
-enable businesses to connect databases to the Web.</p>
-<p>Although a servlet can be a completely self-contained program, you can
-split application development into two portions: <ul>
-<li>The business logic (content generation), which governs the relationship
-between input, processing, and output</li>
-<li>The presentation logic (content presentation, or graphic design rules),
-which determines how information is presented to the user</li>
-</ul>Using this paradigm, you may choose to have business logic handled by <tm
-tmclass="special" tmowner="Sun Microsystems, Inc." tmtype="tm" trademark="Java">Java</tm> beans,
-the presentation logic handled by JavaServer Pages (JSP) or HTML files, and
-the HTTP protocol handled by a servlet.</p>
-<note>JSP files can be used to manage both the presentation and business logic
-for a Web application. JSP files use structured markup for presentation, and
-supply servlet model behavior at run time.</note>
-<p>You can develop, debug, and deploy servlets, set breakpoints within servlet
-objects, and step through code to make changes that are dynamically folded
-into the running servlet on a running server, without having to restart each
-time.</p>
-<p>For more information about servlets, refer to the <cite>Sun Microsystems <tm
-tmclass="special" tmowner="Sun Microsystems, Inc." tmtype="tm" trademark="Java">Java</tm> Servlet
-2.3 Specification</cite> at <codeph>java.sun.com/products/servlet/download.html</codeph>.</p>
-</conbody>
-</concept>
|