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  • [AS3]URLLoader+URLRequest+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。
    Flash客户端代码(test12.swf)
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    1. package project.test {  
    2.       
    3.     import flash.display.*;   
    4.     import flash.net.*;  
    5.     import flash.events.*;  
    6.     import flash.utils.ByteArray;  
    7.       
    8.     import fl.controls.Button;  
    9.       
    10.     import com.klstudio.images.JPGEncoder;  
    11.       
    12.     public class Test12 extends Sprite{  
    13.         private var _base:Shape;  
    14.         private var _rnd_button:Button;  
    15.         private var _submit_button:Button;  
    16.           
    17.         private static const UPLOAD_PAGE:String="http://localhost:8080/upload.jsp";   
    18.           
    19.         public function Test12(){             
    20.             _base = new Shape();  
    21.             _base.x = _base.y = 5;  
    22.             addChild(_base);              
    23.             drawLine();       
    24.               
    25.             _rnd_button = new Button();  
    26.             _rnd_button.label = "随机画图";  
    27.             _rnd_button.setSize(90,22);  
    28.             _rnd_button.move(5,205);  
    29.             _rnd_button.addEventListener(MouseEvent.CLICK,clickHandler);  
    30.             addChild(_rnd_button);  
    31.               
    32.             _submit_button = new Button();  
    33.             _submit_button.label = "保存图片";  
    34.             _submit_button.setSize(90,22);  
    35.             _submit_button.move(105,205);  
    36.             _submit_button.addEventListener(MouseEvent.CLICK,clickHandler);  
    37.             addChild(_submit_button);  
    38.         }  
    39.           
    40.         public function drawRndRect():void{  
    41.             _base.graphics.beginFill(getRndColor());  
    42.             var gWidth:uint = getRndInt();  
    43.             var gHeight:uint = getRndInt();  
    44.             var gX:uint = getRndInt(5,180-gWidth+5);  
    45.             var gY:uint = getRndInt(5,180-gHeight+5);  
    46.             _base.graphics.drawRect(gX,gY,gWidth,gHeight);            
    47.         }  
    48.           
    49.         public function getRndInt(min:uint=10,max:uint=180):uint{  
    50.             return uint(Math.random()*(max-min))+min;  
    51.         }  
    52.           
    53.         public function getRndColor():uint{  
    54.             var r:uint = getRndInt(10,220);  
    55.             var g:uint = getRndInt(10,220);  
    56.             var b:uint = getRndInt(10,220);  
    57.             var c:uint = (r << 16) + (g << 8) + b;  
    58.             return c;  
    59.         }  
    60.           
    61.         public function drawLine():void{              
    62.             _base.graphics.beginFill(0x666666);  
    63.             _base.graphics.drawRect(0,0,190,190);  
    64.             _base.graphics.beginFill(0xFFFFFF);  
    65.             _base.graphics.drawRect(1,1,188,188);  
    66.             _base.graphics.endFill();  
    67.         }  
    68.           
    69.         public function getBitmapData():BitmapData{  
    70.             var bmd:BitmapData = new BitmapData(_base.width,_base.height);  
    71.             bmd.draw(_base);  
    72.             return bmd;  
    73.         }  
    74.           
    75.         public function submit():void{  
    76.             _rnd_button.enabled = false;  
    77.             _submit_button.enabled = false;  
    78.             var encoder:JPGEncoder = new JPGEncoder(80);  
    79.             var bytes:ByteArray = encoder.encode(getBitmapData());  
    80.             var request:URLRequest = new URLRequest(UPLOAD_PAGE);  
    81.             //data值就为图片编码数据ByteArray;  
    82.             request.data = bytes;  
    83.             request.method = URLRequestMethod.POST;  
    84.             //这个是关键,内容类型必须是下面文件流形式;  
    85.             request.contentType = "application/octet-stream";  
    86.               
    87.             var loader:URLLoader = new URLLoader();           
    88.             loader.addEventListener(Event.COMPLETE, completeHandler);  
    89.             loader.addEventListener(IOErrorEvent.IO_ERROR,errorHandler);  
    90.             loader.load(request);  
    91.         }  
    92.           
    93.         private function completeHandler(event:Event):void{  
    94.             trace("图片上传成功");  
    95.             _rnd_button.enabled = true;  
    96.             _submit_button.enabled = true;  
    97.         }  
    98.           
    99.         private function errorHandler(event:IOErrorEvent):void{  
    100.             trace("图片上传失败");  
    101.             _rnd_button.enabled = true;  
    102.             _submit_button.enabled = true;  
    103.         }  
    104.           
    105.         private function clickHandler(event:MouseEvent):void{  
    106.             switch(event.target){  
    107.                 case _rnd_button:  
    108.                     _base.graphics.clear();  
    109.                     drawLine();  
    110.                     drawRndRect();  
    111.                     drawRndRect();  
    112.                     drawRndRect();  
    113.                     drawRndRect();  
    114.                     break;  
    115.                 case _submit_button:  
    116.                     submit();  
    117.                     break;  
    118.             }  
    119.         }  
    120.     }     
    121. }  
    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！

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    1. <%@ page contentType="text/html; charset=utf-8" language="java"%>  
    2. <%@ page import="java.util.*"%>  
    3. <%@ page import="java.io.*"%>  
    4. <%  
    5. int v;  
    6. String filePath = request.getRealPath(System.currentTimeMillis()+".jpg");  
    7. BufferedInputStream inputStream = new BufferedInputStream(request.getInputStream());  
    8. FileOutputStream outputStream = new FileOutputStream(new File(filePath));  
    9. byte [] bytes = new byte[1024];  
    10. while((v=inputStream.read(bytes))>0){  
    11.     outputStream.write(bytes,0,v);  
    12. }  
    13. outputStream.close();  
    14. inputStream.close();  
    15. %>  
    相关实例文件打包下载：http://www.klstudio.com/demo/test/test12.rar
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  • 原文地址：https://www.cnblogs.com/top5/p/1573598.html
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