transfer data to a servlet from a jsf page
===

I have an input in my jsf page like this

    <html:inputText id="ResponseOK" value="#{bean.ResponseOK}" binding="#{bean.ResponseOKInput}" /> 

 I want to get the value in a servlet (by request.getParameter ("ResponseOK")) when i click on a command button

    <html:commandButton value="Valider" action="#{bean.callServlet}"/>

which call a function

    public void callServlet()
    	{
    		 String url = "http://localhost:8080/TestOne/Timers";  //servlet
    	        FacesContext context = FacesContext.getCurrentInstance();  
    	        try {  
    	        	
    	           context.getExternalContext().redirect(url);  
    	           
    	        }catch (Exception e) {  
    	           e.printStackTrace();  
    	        }  
    	        finally{  
    	           context.responseComplete();  
    	        }  
    	}

Unfortunately, in my servlet the variable Ok , return only null

    protected void doGet(HttpServletRequest request,
    			HttpServletResponse response) throws ServletException, IOException {
    		
    		String Ok = request.getParameter("ResponseOK");// return null
    		System.out.println(timerOk);
    		}

thank you very much