How to get original page url/uri after request dispatcher forward

Question

I have a Error404Servlet which is configured as error-page for 404 in web.xml:

   
      Error404
            


        

Answer 1

From the request you can retrieve attributes set by the container in the event of an error:

request.getAttribute("javax.servlet.error.request_uri");

other attributes that can provide usefull information;

javax.servlet.error.status_code
javax.servlet.error.exception_type
javax.servlet.error.message
javax.servlet.error.exception

See also this servlet 2.3 features article.