Java Reference
In-Depth Information
T
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A.1
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Directory
Description
This directory contains all resources related to
the application that are not in the document
root of the application. You must note that the
WEB-INF
directory is not part of the public
document tree of the application. No file con-
tained in this directory can be served directly
to a client.
/
applicationname
/WEB-INF
This directory is where servlet and utility
classes are located.
/
applicationname
/WEB-INF/classes
The
applicationname
we use throughout this topic is
djs
; therefore you need to substitute
djs
for
applicationname
in the previously described directory structure.
Web Application Deployment Descriptors
The Web application deployment descriptor describes configuration and deployment informa-
tion for the entire Web application. The Web application descriptor is an XML file named
web.xml
, located in the
/<SERVER_ROOT>/
applicationname
/WEB-INF/
directory. For our appli-
cation the location of the
web.xml
file is in the
/<SERVER_ROOT>/djs/WEB-INF/
directory. The
information that is contained in the deployment descriptor includes the following elements:
•
ServletContext init
parameters
•
Localized content
•
Session configuration
•
Servlet/JSP definitions
•
Servlet/JSP mappings
•
Mime type mappings
•
Welcome file list
•
Error pages
•
Security
A
The XML descriptor elements that we focus on are mainly servlet specific. The following code
snippet contains an example of a Web application deployment descriptor:
<web-app>
<display-name>A Basic Application</display-name>
<session-timeout>30</session-timeout>
