Hi, everyone:
   I'm trying to pass parameters between page. For example, i pass an id from home.jsp to a seam component in which i do some DB query according the parameter and then redirect to another page.  But i cannot get the queried result.

   the start page:

<f:view>
   <h:form prependId="false">
       <h:inputText id="id" value="#{testId}"></h:inputText>
       <h:commandLink action="#{test_statefull.turn}">
           <h:outputText value="CommandLink"></h:outputText>
       </h:commandLink>
   </h:form>
</f:view>

    the seam component:

@Stateful
@Name("test_statefull")
@Scope(ScopeType.CONVERSATION)
public class TestAction_Stateful implements TestStatefull{
     @PersistenceContext(type = EXTENDED)
     private EntityManager em;

     @DataModel
        //@Out
     private List testList; //=new LinkedList();     
     
     @In(required=false)
     @Out(required=false)
     private String testId;
     
     @Begin(join=true)
     public String turn(){
          System.out.println("%%%%%%%%%%%%%%%%  "+testId);
          
          testList=new LinkedList();
          if(testId.equals("1")){
               testList.add(1);
               testList.add(11);
          }
          else if(testId.equals("2")){
               testList.add(2);
               testList.add(22);
          }
          else{
               testList.add(3);
               testList.add(33);
               testList.add(333);
          }
          
          return "turn";
     }
     
     @Remove
     public void destroy(){
          
     }
}

    the result page:

<f:view>
        <h:dataTable border="0" value="#{testList}" var="ll">
          <h:column id="column1">
               <h:outputText value="#{ll}"></h:outputText>
          </h:column>                    
     </h:dataTable>
</f:view>

    in the result page, i always get nothing.
    I have tried add a factory method into the seam component:
@Factory(testList)

public void find(){          
     System.out.println("%%%%%%%%%%%%%%%%  "+testId);
     System.out.println("%%%%%%%%%%%%%%%%  "+testList);
}

    But both the testId and testList are null.
    I have also tried seam-pojo and stateless-session-bean as the component and tried default scope, but all failed.
    Could anyone help me? Thanks a lot.