How to read from web.xml?

[Ivan Vasquez <iv...@itos.uga.edu>]

Hi,
 
How can I read from web.xml, say, the application's display name? I've
tried several things, but no luck. This isn't really Struts-specific,
but I'm sure this is an easy one for many of you.
 
Thanks,
Ivan.

Re: How to read from web.xml?

[Jason Lea <ja...@kumachan.net.nz>]

Ivan Vasquez wrote:

>Hi,
> 
>How can I read from web.xml, say, the application's display name? I've
>tried several things, but no luck. This isn't really Struts-specific,
>but I'm sure this is an easy one for many of you.
> 
>Thanks,
>Ivan.
>
>  
>

in an struts action you should be able to use:

getServlet().getServletContext().getServletContextName()

from javadocs:
javax.servlet.ServletContext.getServletContextName()
Returns the name of this web application correponding to this 
ServletContext as specified in the deployment descriptor for this web 
application by the display-name element.

(haven't tried this myself though)

-- 
Jason Lea



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Re: How to read from web.xml?

[Craig McClanahan <cr...@apache.org>]

Ivan Vasquez wrote:

>Hi,
> 
>How can I read from web.xml, say, the application's display name? I've
>tried several things, but no luck. This isn't really Struts-specific,
>but I'm sure this is an easy one for many of you.
> 
>Thanks,
>Ivan.
>
>  
>
The web.xml file is available as a resource that can be accessed via the 
ServletContext for your webapp.  For example, you can say something like:

  ServletContext context = ...; // Get a reference to our servlet context
  InputStream stream = context.getResourceAsStream("/WEB-INF/web.xml");

Now you've got an input stream to read the contents ... you'll probably 
want to use an XML parser to parse the contents -- google for JAXP to 
see the API that Java provides for this purpose.  Or, you might consider 
using the Commons Digester package (included with Struts), which is what 
Struts itself uses to parse this very resource, in order to figure out 
how the controller servlet is mapped.  Looking at the source code for 
ActionServlet should give you some useful clues.

Craig


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