August 2002
Intermediate to advanced
688 pages
23h
English
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Web Application Deployment Descriptor
A very
important file is the
WEB-INF/web.xml file. It is the application
deployment descriptor that contains all configuration information for
the application. If your application consists only of JSP and HTML
files, you typically don’t need to worry about this
file at all. But if the application also contains servlets or uses
the container provided security mechanisms, you often need to define
some configuration information in the web.xml
file.
The deployment descriptor is an XML file. A standard XML Document Type Definition (DTD) defines the elements it can contain and how they must be arranged. Example F-1 shows a version of the complete[19] DTD but without the comments. All elements are instead described after the example.
Example F-1. Java Web Application Descriptor DTD
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"> <!ELEMENT web-app (icon?, display-name?, description?, distributable?, context-param*, filter*, filter-mapping*, listener*, servlet*, servlet-mapping*, session-config?, mime-mapping*, welcome-file-list?, error-page*, taglib*, resource-env-ref*, resource-ref*, security-constraint*, login-config?, security-role*, env-entry*, ejb-ref*, ejb-local-ref*)> <!ELEMENT icon (small-icon?, large-icon?)> <!ELEMENT small-icon (#PCDATA)> <!ELEMENT large-icon (#PCDATA)> <!ELEMENT display-name (#PCDATA)> <!ELEMENT description (#PCDATA)> <!ELEMENT distributable EMPTY> ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.