Flex中对表格中某列的值进行数字格式化并求百分比

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1、问题背景

一般的，需要对表格中某列的数值进行格式化，对该数值乘以100，并保留两位小数，添加“%”

2、实现实例

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 <?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 tempData:Number = item.rate*100;  
                 var data:String = dataFormatter.format(tempData);  
                 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>  