getting the f:param from commandButton

hi every body
I have this tags in my jsp:
<h:commandLink action="#{book.edit}">
<f:param name="title" value="#{param.title}" />
</h:commandLink>

how can I get this param in edit method in class Book?

I try to use request.getParameter("title") and request.getRequestMap().get("title") but they work wrong!please help me!
regards
Arona

You may want to try using the FacesContext. Look at some of the examples at the following link...they may help you out.

http://www.jsffaq.com/Wiki.jsp?page=HowToAccessOneManagedBeanFromAnotherManagedBean

hi
I use this code:
ExternalContex contex = FacesContex.getCurrentInstance().getExternalContext();
HttpServletRequest request = (HttpServletRequest)context.getRequest();

and then :
String title = request.getParameter("title");

but title is null.

Maybe I must use another method of getCurrentInstance().
please help me!

Try to request the parameter map instead of references to the HTTP session. Look at this topic below. It pertains to a commandLink, but it should also work for a commandButton. I hope this solves your issue...good luck!

http://wiki.apache.org/myfaces/ExecutingMethodsFromLinkButtonParameters

code:
FacesContext context = FacesContext.getCurrentInstance();
Map map = context.getExternalContext().getRequestParameterMap();
String localVariable = (String) map.get("your value");

hi
At first thanks for the useful linkes.
I use the exact code you wrote, but still title is null.

FacesContext context = FacesContext.getCurrentInstance();
Map map = context.getExternalContext().getRequestParameterMap();
String title= (String) map.get("title");

Please help me.
Regards

f:param is only handled by h:commandLink. Per the spec, the commandButton doesn't perform any actions with respect to h:param.

Just another way of doing this using a4j:
----------xhtml code------------------------
<a4j:form>
<a4j:commandButton action="#{TestPage.testMethod}" value="Submit">
<f:param name="title" value="TestValue" />
</a4j:commandButton>
</a4j:form>

---------backing bean code---------------------
public void testMethod(){
FacesContext context = FacesContext.getCurrentInstance();
Map map = context.getExternalContext().getRequestParameterMap();
String title1= (String) map.get("title");
}

Though its an old post, just adding my comments if it could help someone looking for same stuff.

Arnav Jain,

You saved my day !!!