AS3中的序列化与反序列化

import flash.events.MouseEvent;
import flash.utils.ByteArray;
import com.adobe.images.JPGEncoder;
import flash.display.Bitmap;
 
 
var bytes:ByteArray;
var bit:SampleImage;//SampleImage是库中的图片链接"类名"
 
//将图片序列化为ByteArray
function btnEncodeClick(e:MouseEvent):void {
    var jpg:JPGEncoder = new JPGEncoder();
    bytes = jpg.encode(bit);
    txtArray.text = "";
    for (var i:uint=0,j=bytes.length; i<j; i++) {
        txtArray.appendText(bytes[i].toString() + ",");
    }
    if (txtArray.text.length > 0) {
        txtArray.text = txtArray.text.substring(0,txtArray.text.length - 1);
    }
     
    btnEncode.enabled = false;
    btnEncode.removeEventListener(MouseEvent.CLICK,btnEncodeClick);
     
    btnDecode.addEventListener(MouseEvent.CLICK,btnDecodeClick);
}
 
 
//将ByteArray反序列化为图象
function btnDecodeClick(e:MouseEvent):void {
    if (bytes==null){return;}
    var _ld:Loader = new Loader();
    _ld.loadBytes(bytes);
    _ld.contentLoaderInfo.addEventListener(Event.COMPLETE, onComplete);
     
    btnDecode.enabled = false;
    btnDecode.removeEventListener(MouseEvent.CLICK,btnDecodeClick);
}
 
//加载完成的回调函数
function onComplete(e:Event):void {
    var bitMap:Bitmap = e.target.content as Bitmap;//读取Bitmap   
    addChild(bitMap);
    bitMap.y = 7;
    bitMap.x = 330;
}
 
function init():void{
    bit = new SampleImage();
    var bitMap:Bitmap = new Bitmap(bit);
    bitMap.x = 100;
    bitMap.y = 7;
    addChild(bitMap);
    btnEncode.addEventListener(MouseEvent.CLICK,btnEncodeClick);
     
}
 
init();

import flash.events.MouseEvent;
import flash.utils.ByteArray;
import flash.display.Bitmap;
import flash.events.Event;
import flash.net.FileReference;
 
 
var bytes:ByteArray;
var bit:SampleImage;//SampleImage是库中的图片链接"类名"
 
//将图片序列化为ByteArray
function btnEncodeClick(e:MouseEvent):void {
 
    bytes = new ByteArray();
 
    bytes.writeUnsignedInt(bit.width);
    // 保存图像宽度;
 
    bytes.writeBytes(bit.getPixels(bit.rect));
    //保存图像字节数组;
 
    bytes.compress();
 
 
    /*
    var fileRef:FileReference = new FileReference();
    fileRef.save(bytes,"image.bmd");
    // 默认文件名: "image.bmd";*/
 
 
    trace(bytes.length);
 
    txtArray.text = "";
 
    for (var i:uint=0,j=bytes.length; i<j; i++) {
        txtArray.appendText(bytes[i].toString() + ",");
    }
 
    if (txtArray.text.length > 0) {
        txtArray.text = txtArray.text.substring(0,txtArray.text.length - 1);
    }
 
    btnEncode.enabled = false;
    btnEncode.removeEventListener(MouseEvent.CLICK,btnEncodeClick);
 
    btnDecode.addEventListener(MouseEvent.CLICK,btnDecodeClick);
}
 
 
//将ByteArray反序列化为图象
function btnDecodeClick(e:MouseEvent):void {
    if (bytes == null) {
        return;
    }
 
    /*var ldr:URLLoader = new URLLoader();  
    ldr.dataFormat = URLLoaderDataFormat.BINARY;// ** 这里一定要指定dataFormat为URLLoaderDataFormat.BINARY **   
    ldr.addEventListener(Event.COMPLETE, on_fileLoad);  
    ldr.addEventListener(IOErrorEvent.IO_ERROR, on_fileLoadError);  
    var pathToBitmapDataFile:String = "image.bmd";
    ldr.load(new URLRequest(pathToBitmapDataFile));*/
     
    bytes.uncompress();
    var iWidth:int = bytes.readUnsignedInt();
    var iHeight:int = ((bytes.length - 4) / 4) / iWidth;    
    var bmd:BitmapData = new BitmapData(iWidth,iHeight,true,0);
    bmd.setPixels(bmd.rect, bytes); 
    var bm:Bitmap = new Bitmap(bmd);
    addChild(bm);
    bm.y = 7;
    bm.x = 330;
 
    btnDecode.enabled = false;
    btnDecode.removeEventListener(MouseEvent.CLICK,btnDecodeClick);
}
 
/*function on_fileLoadError(evt:Event):void {
    trace(evt.type);
}
 
function on_fileLoad(evt:Event):void {
    if (evt.type == Event.COMPLETE) {
        var data:ByteArray = URLLoader(evt.target).data as ByteArray;
        if (data) {
            try {
                data.uncompress();
            } catch (e:Error) {
 
            }
 
            // 此时的数据已经是解压后的字节数组了
            // 数据解压后
            var width:int = data.readUnsignedInt();// 起始的4个字节
            // after data.uncompress()
            var height:int = ((data.length - 4) / 4) / width;
            // (data.length - 4) ** 去掉开始的4个字节,其余的便是位图的字节数组了 **
            // ((data.length - 4) / 4) ** 每个像素4个字节长, 所以要除以4得到总像素数 **
            // ((data.length - 4) / 4) / 宽度 ** 记住,因为是矩形才能这样计算出高度 **
            var bmd:BitmapData = new BitmapData(width,height,true,0);// 32位支持alpha通道的位图
            bmd.setPixels(bmd.rect, data);
            // 数据的position指向第5个字节了;
            var bm:Bitmap = new Bitmap(bmd);
            addChild(bm);
             
        }
 
    }
 
}
*/
 
 
function init():void {
    bit = new SampleImage();
    var bitMap:Bitmap = new Bitmap(bit);
    bitMap.x = 100;
    bitMap.y = 7;
    addChild(bitMap);
    btnEncode.addEventListener(MouseEvent.CLICK,btnEncodeClick);
 
}
 
init();