Answer / rambabu gonela

URL rewriting is another way of exchanging session ID (as
part of URL) when clients does not accept cookies (cookies
disabled on browser).

When cookies are disabled on client, client just ignores
the session information on all response headers. The
session?s isNew() method will always return true (Container
keep creating new sessions for each request, unless URL
rewriting used).
If all URLs on webpage is explicitly written with
reponse.encodeURL(String url) method, URL rewriting will
happen automatically if cookies don?t work with the client
(encodeURL method will add session information only when
URLrewriting is turned on i.e, session management depends
on URL parameter).

Answer / vinay

you can create form hidden fields also

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