You can't have two parameters in a request with the same name.

This is possible but not with the javax.faces API. You would have to fall back to the servlet API.

Note the differences:

http://java.sun.com/javaee/5/docs/api/javax/faces/context/ExternalContext.html#getRequestParameterMap()

http://java.sun.com/javaee/5/docs/api/javax/servlet/ServletRequest.html#getParameterMap()

I think something like this should work:

ServletRequest request = (ServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest();

// the map contains keys as String and values as String []
Map params = request.getParameterMap();

i use FacesContext.getCurrentInstance().getExternalContext().getRequestParameterValuesMap().get("paramName")

V.