Flex中对表格中某列的值进行数字格式化

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1、问题背景

一般的，表格中展示的比率，对比率的处理是：保留两位小数，并向上保留

2、实现实例

<?xml version="1.0" encoding="utf-8"?><s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"    xmlns:s="library://ns.adobe.com/flex/spark"    xmlns:mx="library://ns.adobe.com/flex/mx"   width="100%" height="100%" fontSize="12"   fontFamily="微软雅黑"><s:layout><s:BasicLayout/></s:layout><fx:Script><![CDATA[import mx.collections.ArrayCollection;import mx.events.FlexEvent;[Bindable]//表格数据绑定private var gridArray:ArrayCollection = new ArrayCollection([{week:"星期一",apple:"3676",rate:"0.7868"},{week:"星期二",apple:"4534",rate:"0.65454"},{week:"星期三",apple:"6758",rate:"0.876454"},{week:"星期四",apple:"9808",rate:"0.34224"},{week:"星期五",apple:"6567",rate:"0.9876523"},{week:"星期六",apple:"9000",rate:"0.566777"},{week:"星期日",apple:"4533",rate:"0.988787"}]);/** * 对表格中的比率进行格式化 */private function formatDataGrid(item:Object,column:DataGridColumn):String{var temp:Number = item.rate;var data:String = dataFormatter.format(temp);return data;}]]></fx:Script><fx:Declarations><!--格式化数字--><mx:NumberFormatter id="dataFormatter" precision="2" rounding="up"/></fx:Declarations><mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="20" paddingTop="10" horizontalAlign="center"><mx:DataGrid id="dataGrid" width="100%" height="90%" dataProvider="{gridArray}" textAlign="center"><mx:columns><mx:DataGridColumn headerText="星期" dataField="week"/><mx:DataGridColumn headerText="苹果" dataField="apple"/><mx:DataGridColumn headerText="比率" dataField="rate" labelFunction="formatDataGrid"/></mx:columns></mx:DataGrid></mx:VBox></s:Application>

3、实现结果

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