Hi

Please go through the topic below:


Mapping URLs to Web Components:

When a Web Component receives a request, the web container must determine which 
web component should handle the request. The web container does so by mapping 
the URL path contained in the request to a web application and a web component. 
A URL path contains the context root and, optionally, a URL pattern:

http://host:port/context-root[/url-pattern]

You set the URL pattern for a servlet by using the @WebServlet annotation in 
the servlet source
file.

For example, the GreetingServlet.java(name assumed,make ur own ) file in the 
hello2 application contains the following annotation, specifying the URL 
pattern as /greeting:

@WebServlet("/greeting")
public class GreetingServlet extends HttpServlet {
...

This annotation indicates that the URL pattern /greeting follows the context 
root. Therefore,when the servlet is deployed locally, it is accessed with the 
following URL:

http://localhost:8080/hello2/greeting

To access the servlet by using only the context root, specify "/" as the URL 
pattern.



Thank You

Regards
Rahul Singh




-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of Lawrence Louie
Sent: Wednesday, October 13, 2010 7:19 AM
To: Java Programming Online Training Course By Sang Shin
Subject: [java programming] real usage of anoatation.

Hi,

Can you please provide some sample in terms of how the main program
will actually get used the member annotation?  Thx.

Lawrence

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