use jquery ajax to call an action struts2

My JS function to call Action through jquery:

function getData(plNum, plName, code){
   var myJson = {};
  myJson.planNumber = plNum;
  myJson.planName = plName;
  myJson.code = code;
 var jsonString  = JSON.stringify(myJson); /* using json string in the "data" below does not work  */
 console.log(jsonString);

 $.ajax({
        url: "getABCPlans",
        data: {"planNumber" : plNum, "planName" : plName, "code" : code}, /*jsonString,*/    /*dataType: 'json',*/  /*  Not needed, if not returning a json and not sending as a json, needs json interceptor */

        type: 'GET',
        /*contentType: 'application/json;charset=utf-8',*/  /*  Not needed, if not returning a json and not sending as a json, needs json interceptor */
        success: function (res) {
         showAnalystPlans(res);
        },
        error: function (request, status, error) {
            console.log(status);
        }
    });
 return false;
}

Where Action class ("MyPlanAction" class) has the corresponding method as:

public String getPlans() {
  String planNum = getPlanNumber(); /*getter and setter of "planNumber" */
  String planName = getPlanName(); /*getter and setter of "planName" */
  String code = getCode(); /* getter and setter of "code" */
  MyBO bo = new MyBO ();
   try {
    bo.seList(MyService.getPlans(planNum, planName, code));
   } catch (Exception exception) {
    logger.error(exception.getMessage());
   }
  return SUCCESS;
 }

And my struts config has entries:

<action name="getABCPlans" class="com.my.action.MyPlanAction"
  method="getPlans">
    <interceptor-ref name="defaultStack"></interceptor-ref>
 <result name="success" type="dispatcher">
     <param name="location">WEB-INF/pages/plansPage.jsp</param>
 </result>
 </action>