有谁会dataTable插件的使用

一直在加载。。。数据显示不出。。JS代码是这样的。。

$(document).ready(function(){
   $('#example').dataTable( {
    "bProcessing": true, 
    "bServerSide": true,
    "sPaginationType":"full_numbers",
    "sAjaxSource":"/strutsExampleJson/fetchItemsJson",
         "fnServerData":function(sUrl,aoData,fnCallback){
            $.ajax({
                 "url": sUrl,
                 "data": aoData,
                 "success": fnCallback,
                 "dataType": "json",
                 "cache": false
         });
       }
    } );
});
后台传过来的JSON数据是这样的

{
"iTotalDisplayRecords":0,
"iTotalRecords":0,
"aaData":[
{"name":"LM","price":"2000"},{"name":"M3","price":"25000"},{"name":"M1","price":"2000"},{"name":"M2","price":"2000"}],
"sEcho":0}