jquery dataTable解析后台传回的json报错

JSP：

 <table class="table table-striped table-hover table-bordered" id="sample_editable_1">

                                    <thead>

                                        <tr>

                                            <th>实验室名称</th>

                                            <th>所属学院</th>

                                            <th>分类</th>

                                            <th>创建日期</th>

                                            <th>创建人</th>

                                            <th>编辑</th>

                                            <th>删除</th>

                                        </tr>

                                    </thead>

                                    <tbody>

                                    </tbody>

前台js：

 var oTable = $('#sample_editable_1').dataTable({
                "aLengthMenu": [
                    [5, 15, 20, -1],
                    [5, 15, 20, "All"] // change per page values here
                ],
                // set the initial value
                "iDisplayLength": 15,
                "sDom": "<'row-fluid'<'span6'l><'span6'f>r>t<'row-fluid'<'span6'i><'span6'p>>",
                "sPaginationType": "bootstrap",
                "oLanguage": {
                    "sLengthMenu": "_MENU_ 每页显示条数",
                    "oPaginate": {
                        "sPrevious": "上一页",
                        "sNext": "下一页"
                    }
                },
                "aoColumns" : [{
                    "rows" : "labName"
                },{
                    "rows" : "academy"
                },  {
                    "rows" : "category"
                } , {
                    "rows" : "createTime"
                } , {
                    "rows" : "createrName"
                } , {
                    "rows" : ""
                },  {
                    "rows" : ""
                }],

                "bProcessing":false,
                "bServerSide":true,
                "sAjaxSource":"/getAllLabInfo",

                "fnServerData":function ( sSource,aoData, fnCallback) {
                    $.ajax({
                        url : sSource,//这个就是请求地址对应sAjaxSource
                        data : {"aoData":JSON.stringify(aoData)},//这个是把datatable的一些基本数据传给后台,比如起始位置,每页显示的行数
                        type : 'post',
                        dataType : 'json',
                        async : false,
                        success : function(result) {
                            alert(result.rows[0].labName);
                            fnCallback(result.rows);//把返回的数据传给这个方法就可以了,datatable会自动绑定数据的
                        },
                        error : function(msg) {
                        }
                    });
                    alert(aoData);
                }

            });

后台json：
{"total":3,"rows":[{"createTime":"2016-05-12 17:01:30.000000","labName":"物理实验室","id":1,"category":"物理类","academy":"理学院","createrName":"sysadmin"},{"createTime":"2016-05-12 17:01:37.000000","labName":"化学实验室","id":2,"category":"化学类","academy":"理学院","createrName":"sysadmin"},{"createTime":"2016-05-12 17:01:40.000000","labName":"金工实习","id":3,"category":"车床打磨","academy":"主校区","createrName":"sysadmin"}]}

报错：

求大神解惑，整了一下午了，再不能只能改用easyui了

找了好久的资料，试了几小时，总结下自己的错误，希望后面遇到同样问题的新人可以快些解决。

json需要包含的数据：
{"sEcho":1,"iTotalRecords":4,"iTotalDisplayRecords":4,"aaData":[{"Name":"name1","Campus":"campus1","Advisor":"advisor1","StepsCompleted":1,"Paid":true,"Started":"2013-06-15T20:24:07.3187581-04:00","Completed":"2013-06-15T20:24:07.3187581-04:00","Options":""}

js代码：

``` var oTable = $('#sample_editable_1').dataTable({
"aLengthMenu": [
[5, 15, 20, -1],
[5, 15, 20, "All"] // change per page values here
],
// set the initial value
"iDisplayLength": 15,
"sDom": "<'row-fluid'<'span6'l><'span6'f>r>t<'row-fluid'<'span6'i><'span6'p>>",
"sPaginationType": "bootstrap",
"oLanguage": {
"sLengthMenu": "_MENU_ 每页显示条数",
"oPaginate": {
"sPrevious": "上一页",
"sNext": "下一页"
}
},
"aoColumns" : [{
'mDataProp' : "labName"
},{
"mDataProp" : "academy"
}, {
"mDataProp" : "category"
} , {
"mDataProp" : "createTime"
} , {
"mDataProp" : "createrName"
} , {
"mDataProp" : "id"
}, {
"mDataProp" : "id"
}],
"aoColumnDefs": [{
'bSortable': false,
'aTargets': [0]
}
],
"bProcessing":false,
"bServerSide":true,
'sAjaxDataProp': 'aaData',
"sAjaxSource":"/getAllLabInfo",
/*"ajax":"/testData/testLabData.txt",*/

/* "columns":[
{"data":"id"},
{"data":"labName"},
{"data":"academy"},
{"data":"category"},
{"data":"createTime"},
{"data":"createrName"},
{"data":"createrName"}

                       ],*/
           /* "columnDefs":[{
                          "aTargets":[6],
                          "render": function(data, type, full) {
                              return "<a class=\"edit\" href=\"javascript:;\">编辑</a>";
                          }             }
                          ],*/
            "fnServerData":function ( sSource,aoData, fnCallback) {
                $.ajax({
                    url : sSource,//这个就是请求地址对应sAjaxSource
                    data : {"aoData":JSON.stringify(aoData)},//这个是把datatable的一些基本数据传给后台,比如起始位置,每页显示的行数
                    type : 'post',
                    dataType : 'json',
                    async : false,
                    success : fnCallback,/*function(result) {
                        alert(result.data[2].labName);
                        fnCallback(result.data);//把返回的数据传给这个方法就可以了,datatable会自动绑定数据的
                    },*/
                    error : function(msg) {
                    }
                });
            }

        });

尤其注意，'sAjaxDataProp': 'aaData'，这个属性用来修改服务端数据数据项的引用名，默认为“aaData”

 success : function(result) {
                            alert(result.rows[0].labName);
                            fnCallback(result.rows);//把返回的数据传给这个方法就可以了,datatable会自动绑定数据的
                        },

这句alert()能出想要的值来，后面的没alert

 返回的json格式是datatable的吗？datatable的数据关键字是data，不是rows吧。
 查一下datatable的json格式串，按照定义来。

楼主这个问题解决了吗。我最近也在搞这个，最后后台传给前台的json格式到底应该是什么样啊