loop through list of objects

I'm doing JQuery   AJAX call to server.  Server is returning Json.  Here is the pseudo code

Server Side code
-------------------------------
................................................
// create a new Gson instance
 Gson gson = new Gson();
// make a cartList.  cartList is a list of Product objects
 // convert your list to json
String jsonCartList = gson.toJson(cartList);  
 // return your generated json
out.print( jsonCartList);  // return to UI


UI Side
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What code I will write to get the  array of  Products here ?    I am using Jquery

    $.ajax({
      url:"getvalue",
      dataType: "json"
      success:function(responseData) {
         // I'want to loop through list of Products returned by the server. what code I'll write here ?
      }
   });