JPGEncoder实现BitmapData图片数据保存

 这段时间工作忙，一直抽不出空来写点内容。今天晚上正好能静下心来，把工作中用到Flash位图数据保存整理一下，写了下面的应用实例。

package project.test {  
      
    import flash.display.*;   
    import flash.net.*;  
    import flash.events.*;  
    import flash.utils.ByteArray;  
      
    import fl.controls.Button;  
      
    import com.klstudio.images.JPGEncoder;  
      
    public class Test12 extends Sprite{  
        private var _base:Shape;  
        private var _rnd_button:Button;  
        private var _submit_button:Button;  
          
        private static const UPLOAD_PAGE:String="http://localhost:8080/upload.jsp";   
          
        public function Test12(){             
            _base = new Shape();  
            _base.x = _base.y = 5;  
            addChild(_base);              
            drawLine();       
              
            _rnd_button = new Button();  
            _rnd_button.label = "随机画图";  
            _rnd_button.setSize(90,22);  
            _rnd_button.move(5,205);  
            _rnd_button.addEventListener(MouseEvent.CLICK,clickHandler);  
            addChild(_rnd_button);  
              
            _submit_button = new Button();  
            _submit_button.label = "保存图片";  
            _submit_button.setSize(90,22);  
            _submit_button.move(105,205);  
            _submit_button.addEventListener(MouseEvent.CLICK,clickHandler);  
            addChild(_submit_button);  
        }  
          
        public function drawRndRect():void{  
            _base.graphics.beginFill(getRndColor());  
            var gWidth:uint = getRndInt();  
            var gHeight:uint = getRndInt();  
            var gX:uint = getRndInt(5,180-gWidth+5);  
            var gY:uint = getRndInt(5,180-gHeight+5);  
            _base.graphics.drawRect(gX,gY,gWidth,gHeight);            
        }  
          
        public function getRndInt(min:uint=10,max:uint=180):uint{  
            return uint(Math.random()*(max-min))+min;  
        }  
          
        public function getRndColor():uint{  
            var r:uint = getRndInt(10,220);  
            var g:uint = getRndInt(10,220);  
            var b:uint = getRndInt(10,220);  
            var c:uint = (r << 16) + (g << 8) + b;  
            return c;  
        }  
          
        public function drawLine():void{              
            _base.graphics.beginFill(0x666666);  
            _base.graphics.drawRect(0,0,190,190);  
            _base.graphics.beginFill(0xFFFFFF);  
            _base.graphics.drawRect(1,1,188,188);  
            _base.graphics.endFill();  
        }  
          
        public function getBitmapData():BitmapData{  
            var bmd:BitmapData = new BitmapData(_base.width,_base.height);  
            bmd.draw(_base);  
            return bmd;  
        }  
          
        public function submit():void{  
            _rnd_button.enabled = false;  
            _submit_button.enabled = false;  
            var encoder:JPGEncoder = new JPGEncoder(80);  
            var bytes:ByteArray = encoder.encode(getBitmapData());  
            var request:URLRequest = new URLRequest(UPLOAD_PAGE);  
            //data值就为图片编码数据ByteArray;  
            request.data = bytes;  
            request.method = URLRequestMethod.POST;  
            //这个是关键,内容类型必须是下面文件流形式;  
            request.contentType = "application/octet-stream";  
              
            var loader:URLLoader = new URLLoader();           
            loader.addEventListener(Event.COMPLETE, completeHandler);  
            loader.addEventListener(IOErrorEvent.IO_ERROR,errorHandler);  
            loader.load(request);  
        }  
          
        private function completeHandler(event:Event):void{  
            trace("图片上传成功");  
            _rnd_button.enabled = true;  
            _submit_button.enabled = true;  
        }  
          
        private function errorHandler(event:IOErrorEvent):void{  
            trace("图片上传失败");  
            _rnd_button.enabled = true;  
            _submit_button.enabled = true;  
        }  
          
        private function clickHandler(event:MouseEvent):void{  
            switch(event.target){  
                case _rnd_button:  
                    _base.graphics.clear();  
                    drawLine();  
                    drawRndRect();  
                    drawRndRect();  
                    drawRndRect();  
                    drawRndRect();  
                    break;  
                case _submit_button:  
                    submit();  
                    break;  
            }  
        }  
    }     
}  

 服务端代码(upload.jsp)：我使用是Java服务端，当然PHP,ASP.NET也可以了，我在这里就不一一举例了，有兴趣的朋友自己研究了！

%@ page contentType="text/html; charset=utf-8" language="java"%>  
<%@ page import="java.util.*"%>  
<%@ page import="java.io.*"%>  
<%  
int v;  
String filePath = request.getRealPath(System.currentTimeMillis()+".jpg");  
BufferedInputStream inputStream = new BufferedInputStream(request.getInputStream());  
FileOutputStream outputStream = new FileOutputStream(new File(filePath));  
byte [] bytes = new byte[1024];  
while((v=inputStream.read(bytes))>0){  
    outputStream.write(bytes,0,v);  
}  
outputStream.close();  
inputStream.close();  
%>