JavaServer Pages, 3rd Edition

Example Application Deployment Descriptor

Example F-2 shows an example of a deployment descriptor (web.xml) file.

Example F-2. Example deployment descriptor file

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
  xmlns:xsi="http://www.w3c.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
  version="2.4>
  <servlet>
    <servlet-name>
      purchase
    </servlet-name>
    <servlet-class>
      com.mycomp.servlets.PurchaseServlet
    </servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>
      purchase
    </servlet-name>
    <url-pattern>
      /po/*
    </url-pattern>
  </servlet-mapping>
</web-app>

At the top of the file, you find a standard XML declaration and the <web-app> element, with the reference to the deployment descriptor schema. Then follows a <servlet> element that defines a servlet named purchase, and a <servlet-mapping> element that maps the servlet to the /po/* path prefix pattern.