Capturing the output of a JSP page as HTML

[APapada]

Can anyone tell me if this is possible.  I have a JSP page that contains
information about an order that was just entered (Essentially a
confirmation page).  What I want to do is somehow intercept the output
stream inside the JSP page and write it to a file, as plain html, which I
will later attach to an email and send to someone.

Thanks,
Andy