Flex解析json

在flex 3中使用 要使用json作为数据交换格式。需引入corelib ActionScript 3 Library 开发包 
1.    下载地址：http://www.adobe.com/cfusion/exchange/index.cfm?view=sn111&extid=1078469 
2.    下载解压后复制corelib-[1].90\bin 目录下的corelib.swc到你flex 开发包sdk的所在目录。 
    我的flex sdk是安装在：D:\Program Files\Adobe\Flex Builder 3 Plug-in\ 
    只需将该文件复制到：D:\Program Files\Adobe\Flex Builder 3 Plug-in\sdks\3.0.0\frameworks\libs 下面。 
3.    在eclipse下就可以像使用flex 3的标准sdk一样了。import com.adobe.serialization.json.JSON; 
    注意：该sdk下还有一些其他有用的包，慢慢研究吧。。。。 

FLEX处理返回的数据,然后绑定有很多种方法.不过看牛人们一般都是对数据进行处理成对象,再绑定到数据集.可能是这样更符合面向对象,也更合乎规范。用JSON对那些牛人来讲可能是方便不少,数据条理也相对清晰很多.

<?xml version="1.0" encoding="utf-8"?>   
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns="*" layout="absolute"   
    creationComplete="service.send()">   
   
    <mx:Script>   
        <![CDATA[  
            import mx.collections.ArrayCollection;  
            import mx.rpc.events.ResultEvent;  
            import com.adobe.serialization.json.JSON;  
  
            private function onJSONLoad(event:ResultEvent):void  
            {  
                //get the raw JSON data and cast to String  
                var rawData:String = String(event.result);  
  
                //decode the data to ActionScript using the JSON API  
                //in this case, the JSON data is a serialize Array of Objects.  
                var arr:Array = (JSON.decode(rawData) as Array);  
  
                //create a new ArrayCollection passing the de-serialized Array  
                //ArrayCollections work better as DataProviders, as they can  
                //be watched for changes.  
                var dp:ArrayCollection = new ArrayCollection(arr);  
  
                //pass the ArrayCollection to the DataGrid as its dataProvider.  
                grid.dataProvider = dp;  
  
            }  
        ]]>   
    </mx:Script>   
   
    <mx:HTTPService id="service" resultFormat="text"   
                    url="http://weblogs.macromedia.com/mesh/mashedpotato.json"   
                    result="onJSONLoad(event)" />   
   
    <mx:DataGrid id="grid" right="10" left="10" top="10" bottom="10">   
        <mx:columns>   
            <mx:DataGridColumn headerText="Service" dataField="src"/>   
            <mx:DataGridColumn headerText="Title" dataField="title"/>   
        </mx:columns>   
    </mx:DataGrid>   
</mx:Application>