Servlet send redirect to welcome page?

Question

How can I force a Servlet redirect to the welcome page without having to specify the exact path? Like just altering the path to the most upper one:

response.sendRedirect("/");

Which does obviously not work.

Answer 1

response.sendRedirect(response.encodeRedirectURL(request.getContextPath() + "/"));

The call to encodeRedirectURL is necessary if you want to support session tracking for browsers with cookie support disabled (i.e. using URL rewriting).

Answer 2

Thanks to Michael-O above, following solution:

response.sendRedirect(request.getContextPath());