最近操作Xml文件比较多，因此封装了一下Xml文件操作类

　　主要功能包括：   1.Xml 转 Object

　　　　　　　　　　2.Object 转 Xml

　　　　　　　　　　3.读取本地Xml（air）

　　　　　　　　　　4.Xml写到本地（air）

　　代码如下：

　　

 

package {    import flash.events.EventDispatcher;    import flash.filesystem.File;    import flash.filesystem.FileMode;    import flash.filesystem.FileStream;    import flash.system.System;    import flash.xml.XMLDocument;    import flash.xml.XMLNode;        import mx.collections.ArrayCollection;    import mx.rpc.xml.SimpleXMLDecoder;    import mx.rpc.xml.SimpleXMLEncoder;        import org.binyy.supermedia.app.utils.config.Config;    /**     *Xml Manager      * */    public class XmlManager extends EventDispatcher    {                private static const XMLHEAD:String = '
     ';                public function XmlManager()        {            throw new Error("Don't init static class");        }                /**         * update xml data         * @param data         * @param path         * */        public static function updateXmlItem(data:ArrayCollection,path:String):void        {            var xml:XML = objectToXML(Util.sortItemIndex(data).source);            writeXmlFile(xml,path);            if(xml)                System.disposeXML(xml);            if(data)                data = null;        }                /**         * remove xml data         * @param data         * @param path         * */        public static function removeXmlItem(data:ArrayCollection,path:String):void        {            for(var i:int = data.length -1 ; i >= 0 ; i--)            {                if(data.getItemAt(i).selected)                {                    data.removeItemAt(i);                }            }            var xml:XML = objectToXML(Util.sortItemIndex(data).source);            writeXmlFile(xml,path);            if(xml)                System.disposeXML(xml);            if(data)                data = null;        }                /**         * Object to Xml         * @param obj         *          * @return XML         * */        public static function objectToXML(obj:Object):XML                         {                                     var xmlDocument:XMLDocument = new XMLDocument();               var xmlNode:XMLNode = (new SimpleXMLEncoder(xmlDocument)).encodeValue(obj, new QName("root"), xmlDocument);                      var xml:XML = new XML(xmlDocument.toString());                                     return xml;                        }                 /**         * Xml to Object         * @param xml         *          * @return Object         * */        public static function XMLToObject(xml:XML):Object        {            var xmlDocument:XMLDocument = new XMLDocument(xml);            var resultObj:Object = (new SimpleXMLDecoder()).decodeXML(xmlDocument);            return resultObj;        }                /**         * read Local xml file         * @param path         *          * @return XML         * */        public static function readXmlFile(path:String):XML        {            var file:File = File.applicationDirectory.resolvePath(path); //            trace("read : " + file.nativePath);            var fileStream:FileStream = new FileStream();             fileStream.open(file, FileMode.READ);             var xml:XML = XML(fileStream.readUTFBytes(fileStream.bytesAvailable));             fileStream.close();            return xml;        }                /**         * write Local  xml file         * @param xml XML file         * @param path         * */        public static function writeXmlFile(xml:XML,path:String):void        {            var file:File = new File(File.applicationDirectory.resolvePath(path).nativePath);            //            trace("write : " + file.nativePath);            var fileStream:FileStream = new FileStream();             fileStream.open(file, FileMode.WRITE);             var outputString:String = XMLHEAD;             outputString += xml.toXMLString();             fileStream.writeUTFBytes(outputString);             fileStream.close();        }            }}