[jQuery] how to access the data from $.getJSON(ur,params,function(data)(){}‏

Hello,

I am using struts2 and Jquery now.

And who can please tell me how to access the sorttiervo from the
'data' $.getJSON('SortTiersAction',params,function(data)(){}

data.sorttiervo? or other ways?

public class SortTiersAction extends BaseActionS2 implements
ModelDriven {
SortTierService sorttierservice = new SortTierService();
private SortTierVO sorttiervo = new SortTierVO();

public void setModel(SortTierVO sorttiervo) {
this.sorttiervo = sorttiervo;
}

public Object getModel() {
return this.sorttiervo;
}

public String execute() throws DefaultException {

//do someting here;

}

in struts.xml file

<action name="SortTierQueryAction"
class="com.qic.system.action.SortTiersAction">
<result type="json">
<param name="noCache">true</param>
</result>
</action>