关于Ext饼图

[dannielhome]

后台传到js的json数据如此{"total":"1","records":[{"rdsum":2,"valrdsum":12,"percent":"16.67%"}]}想根据分母为valrdsum，分子rdsum做饼图，数据怎么传都搞不出来，求助这个饼图该怎么弄啊。。。。。。

[prince_java]

Ext.chart.Chart.CHART_URL = 'extj/resources/charts.swf';
Ext.onReady(function(){
    var store = new Ext.data.JsonStore({
        fields:['name', 'visits'],
        data: [
            {name:'郭振祥', visits: 245000},
            {name:'高永仓', visits: 240000},
            {name:'张金锋', visits: 355000},
            {name:'尹锋', visits: 375000},
            {name:'周志威', visits: 490000},
            {name:'郝红兵', visits: 495000},
            {name:'陈颜楠', visits: 520000},
            {name:'杨双辉', visits: 620000}
        ]
    });
    new Ext.Panel({
        title: '各网管处理工单数量',
        width:500,
        height:300,
        renderTo:'container1',
        layout:'fit',
        items: {
            xtype: 'piechart',
            store: store,
            dataField: 'visits',
            categoryField: 'name'
        }
    });
});

这是我写的例子，数据是在页面上定死的，你传过来的数据用JsonReader处理，JsonReader的第一个参数这样写{totalProperty:'total',root:'records'}
后台不要计算百分比，exjts的chart会自动计算