Flex HTTPService 读取XML并显示在 Tree 中

1、Flex读取XML的两种方式：

<fx:Declarations>
        <!-- 1 -->
        <fx:XML id="xmldata" source="data/testdata.xml" format="e4x"/>
        <!-- 2 -->
        <s:HTTPService id="httpdata" url="data/testdata.xml" resultFormat="e4x" result="showXML(event)" />
</fx:Declarations>

2、HTTPService 读取XML并显示在 Tree 中

<?xml version="1.0" encoding="utf-8"?><s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" applicationComplete="init()"   xmlns:s="library://ns.adobe.com/flex/spark"    xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"><s:layout><s:VerticalLayout horizontalAlign="center" verticalAlign="middle"/></s:layout><fx:Declarations><!-- 将非可视元素（例如服务、值对象）放在此处 --><s:HTTPService id="httpdata" url="data/testdata.xml" resultFormat="e4x" result="showXML(event)" /></fx:Declarations><fx:Script><![CDATA[import mx.rpc.events.ResultEvent;private function init():void {httpdata.send();}private function showXML(event:ResultEvent):void {var treeData:XML = event.result as XML;t.dataProvider = treeData;}]]></fx:Script><mx:Tree id="t" width="339" height="264" labelField="@label" /></s:Application>

XML文本：

<?xml version="1.0" encoding="UTF-8"?><books label="books"><book label="book1"><id label="id">1001</id><name label="name">book1</name><price label="price">1</price></book><book label="book2"><id label="id">1002</id><name label="name">book2</name><price label="price">2</price></book><book label="book3"><id label="id">1003</id><name label="name">book3</name><price label="price">3</price></book><book label="book4"><id label="id">1004</id><name label="name">book41</name><price label="price">4</price></book><book label="book5"><id label="id">1005</id><name label="name">book5</name><price label="price">5</price></book></books>