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From "Shapira, Yoav" <>
Subject RE: Subclassing ServletOutputStream/PrintWriter
Date Tue, 03 Aug 2004 14:44:50 GMT


>Thus, I can't use the incoming response object to write to.  As there
>seem to be a default means of getting at a new outputStream object, or
>printWriter, I presume that I have to subclass ServletOutputStream or
>PrintWriter - correct?

No, not correct.  That's the part you're missing.  That's a good thing
in this case because we'll save you work ;)

Your servlet using sendError is fine.  You would then configure an error
page for this error in your web.xml using the <error-page> directive.
The server will go to this error page, which can be a servlet, JSP, or
static page as you wish.  This error page will have a fresh response
object to which you can write whatever you want.

You don't need to subclass ServletOutputStream or PrintWriter.  In fact
it's fairly rare that you'd need to extend these for servlet

You can accomplish a similar thing to the above declarative error-page
behavior by using response.sendRedirect in your original servlet that's
now using sendError.

Yoav Shapira

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