There are 8 listeners and 6 events associated with these listeners. out of these 6 events only ServletRequestEvent Class has got a method getServletRequest().
so if you are writing a class that implements ServletRequestListener interface, then you get ServletRequestEvent. From this event you can call getServletRequest(). you will have to cast it to HttpServletRequest.
You will not get request objects in other listeners because the API does not provide for it.