Here is the way, how we get request parameters from a JSP page (which is JSF enabled) in a HTTP request object.

import javax.faces.context.FacesContext;
//…your code
HttpServletRequest request = (HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest();
String controlName = request.getParameter("formId:controlId");

Where formName is refer to the id of your form and controlId is referred to the id of your control.