Query string in jsf

[yogesh jarad]

I have a problem with query string value in the managed bean . the below code return null . but value is get append to URL. any suggestion ?

String queryString =  ((HttpServletRequest) FacesContext.getCurrentInstance()
      .getExternalContext().getRequest()).getParameter(citemno); 

<managed-bean-name>Inventory</managed-bean-name>
		<managed-bean-class>com.gnd.managedbeans.ManagedInventory</managed-bean-class>
		<managed-bean-scope>request</managed-bean-scope>
		 <managed-property
        <property-name>citemno</property-name>
     	   <value>#{param.citemno}</value>
    </managed-property>

this is my Jsf code

<f:param name="citemno" value="#{Inventory.entity.citemno}">
</f:param>