highcharts动态生成x轴数据

$.ajax({
        type:'get',
        url:JsCore.SysPath + 'finautil/GetReportProof.aspx',
        dataType: 'json',
        success:function(data){
            if(data!=null){
                var chart = $('#container2').highcharts();
                var json = evalJson(data);
                var arr1= [];
                var arr2= [];
                $.each(json,function (key,value) {
                    arr1.push(value.NodeName); 
                    arr2.push(value.WorkTime); 
                });
                chart.xAxis[0].setCategories(arr1);  
                chart.series[0].setData(arr2); 
            }
        }
    });