How to read the POST parameters in Portlet

Hi,

I have a requirement,
Where i’ve many portlet placed in Liferay Portal page (test). where the Portal page has a URL e.g. http://192.168.2.16:8080/web/guest/test
& when anyone invokes this URL with some POST parameters. How can i get those POST parameters in any of the portlet in that page.

BR,
Chethan