f:param and UTF-8 URL Encoding

[KwonNam Son]

Hello,
The following is a fragment of my JSP.
<f:form>
  blah... blah...

  <h:commandLink rendered="true" id="lnkTemplateUpdateAction"
action="notificationTemplateUpdate" immediate="true" charset="utf-8">
    <f:param name="templateName" value="#{data.templateName}"/>
    <h:outputText value="#{data.templateName}" />
  </h:commandLink>

 blah.. blah...
</f:form>

I use f:param and value can be unicode(I use UTF-8).
Whern data.templateName is only english characters, there is no problem.
But, if there are unicode characters, a problem shows up.
When the action page take the prameter (using ExternalContext
.getRequestParameterMap())
the value comes out like this : &#50644;&#51652;&#50640;&#47084;
But what I expected is : %EC%97%94%EC%A7%84%EC%97%90%EB%9F%AC
(I use encoding servlet filter)

How can I make JSF encode parameters like
%EC%97%94%EC%A7%84%EC%97%90%EB%9F%AC ??

Thanks,

KwonNam.