Flex在线拍照功能(附源码)

Flex代码：

<? xml version="1.0" encoding="utf-8" ?>
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"  layout ="absolute"  width ="388"  height ="222"  creationComplete ="initApp()"  backgroundColor ="#A6C9E2" >
      < mx:Style >
         Alert{font-size:12px;}
      </ mx:Style >
      < mx:Script >
          <![CDATA[
             import mx.events.CloseEvent;
             import mx.rpc.events.FaultEvent;
             import mx.rpc.events.ResultEvent;
             import mx.controls.Alert;
             import mx.core.Application;
            
             private static const DEFAULT_CAMERA_WIDTH:Number = 160; //摄像头显示宽度
             private static const DEFAULT_CAMERA_HEIGHT:Number = 120; //摄像头显示高度
             private var DEFAULT_WEBSERVICE_URL:String = ""; //WebService地址
             private var str:String;
            
             private var m_camera:Camera; //定义一个摄像头
             private var m_localVideo:Video; //定义一个本地视频
             private var m_pictureBitmapData:BitmapData //定义视频截图
             [Bindable]
             private var m_pictureData:String;
            
             private function initApp():void
             {
                 t_btn_Shooting.enabled = false;
                 t_ban_Save.enabled = false;
                 initCamera();
                 DEFAULT_WEBSERVICE_URL = Application.application.parameters.contextPath+"/onLineTakePhotoServlet";
                 t_ws_SavePicture.url=DEFAULT_WEBSERVICE_URL;
             }
            
             //初始化摄像头
             private function initCamera():void
             {
                 m_camera = Camera.getCamera();
                 if(m_camera != null)
                 {
                     m_camera.addEventListener(StatusEvent.STATUS,__onCameraStatusHandler);
                    
                     m_camera.setMode(DEFAULT_CAMERA_WIDTH,DEFAULT_CAMERA_HEIGHT,30);
                     m_localVideo = new Video();
                     m_localVideo.width = DEFAULT_CAMERA_WIDTH;
                     m_localVideo.height = DEFAULT_CAMERA_HEIGHT;
                     m_localVideo.attachCamera(m_camera);
                     t_vd_Video.addChild(m_localVideo);
                 }
                 else
                 {
                     Alert.show("没有找到摄像头，是否重新查找。","提示：",Alert.OK|Alert.NO,this,__InitCamera);
                     return;
                 }
             }
            
             //拍照按钮事件，进行视频截图
             private function SnapshotPicture():void
             {
                 m_pictureBitmapData = new BitmapData(DEFAULT_CAMERA_WIDTH,DEFAULT_CAMERA_HEIGHT);
                 m_pictureBitmapData.draw(t_vd_Video,new Matrix());
                
                 var m_pictureBitmap:Bitmap = new Bitmap(m_pictureBitmapData);
                 t_img_Picture.addChild(m_pictureBitmap);
                
                 t_panel_Picture.visible = true;
                 t_ban_Save.enabled = true;
             }
            
             //保存按钮事件，保存视频截图
             //通过WebService保存
             private function SavePicture():void
             {
                 m_pictureData = "";
                 for(var i:int = 0; i < DEFAULT_CAMERA_WIDTH; i++)
                 {
                     for(var j:int = 0; j < DEFAULT_CAMERA_HEIGHT; j++)
                     {
                         if(m_pictureData.length > 0)
                         {
                             m_pictureData += "," + m_pictureBitmapData.getPixel32(i,j).toString();
                         }
                         else
                         {
                             m_pictureData = m_pictureBitmapData.getPixel32(i,j).toString();
                         }
                     }
                 }
                 
                 var params:URLVariables = new URLVariables();
     params.width = DEFAULT_CAMERA_WIDTH;
     params.height = DEFAULT_CAMERA_HEIGHT;
     params.bitmap_data = m_pictureData;
     t_ws_SavePicture.send(params);
             }
            
             //检测摄像头权限事件
             private function __onCameraStatusHandler(event:StatusEvent):void
             {
                 if(!m_camera.muted)
                 {
                     t_btn_Shooting.enabled = true;
                 }
                 else
                 {
                     Alert.show("无法链接到活动摄像头，是否重新检测。","提示：",Alert.OK|Alert.NO,this,__InitCamera);
                 }
                 m_camera.removeEventListener(StatusEvent.STATUS,__onCameraStatusHandler);
             }
            
             //当摄像头不存在，或连接不正常时重新获取
             private function __InitCamera(event:CloseEvent):void
             {
                 if(event.detail == Alert.OK)
                 {
                     initApp();
                 }
             }
            
             //WebService保存图片成功事件
             private function __onSavePictureResult(event:ResultEvent):void
             {
                 //trace(event.result);
                 if(event.result.toString() != "保存失败")
                 {
                   str = event.result.toString();
                   
                     Alert.show("保存成功,是否关闭窗口？","提示",3,this,__onAlertCloseHandler);
                 }
                 else
                 {
                     Alert.show(event.result.toString(),"提示",Alert.OK);
                 }
             }
            
             //连接WebService失败事件
             private function __onSavePictureFault(event:FaultEvent):void
             {
                 //Alert.show(event.fault.toString(),"提示",Alert.OK);
                 Alert.show("连接服务器失败。","提示",Alert.OK);
             }
            
             //保存图片成功后的弹出窗口确认事件
             private function __onAlertCloseHandler(event:CloseEvent):void
             {
                 if(event.detail == Alert.YES)
                 {
                    ExternalInterface.call("setValueToField",str);
                 }
             }
          ]]>
      </ mx:Script >
      < mx:HTTPService  id ="t_ws_SavePicture"  showBusyCursor ="true"  method ="POST"  useProxy ="false"  result ="__onSavePictureResult(event)"  fault ="__onSavePictureFault(event)" />
      < mx:Panel  x ="10"  y ="10"  width ="180"  height ="200"  layout ="absolute"  title ="视频拍照"  fontSize ="12" >
          < mx:VideoDisplay  id ="t_vd_Video"  width ="160"  height ="120" />
          < mx:ControlBar  horizontalAlign ="right" >
              < mx:Button  id ="t_btn_Shooting"  label ="拍照"  click ="SnapshotPicture()" />
          </ mx:ControlBar >
      </ mx:Panel >
      < mx:Panel  id ="t_panel_Picture"  x ="198"  y ="10"  width ="180"  height ="200"  layout ="absolute"  title ="拍照图片"  fontSize ="12"  visible ="false" >
          < mx:Image  id ="t_img_Picture"  x ="0"  y ="0"  width ="160"  height ="120" />
          < mx:ControlBar    horizontalAlign ="right" >
              < mx:Button  id ="t_ban_Save"  label ="保存"  click ="SavePicture()"   />
          </ mx:ControlBar >
      </ mx:Panel >

</mx:Application>

java代码：

package  cn.myapps.core.onlinetakephoto;

import  java.awt.Color;
import  java.awt.image.BufferedImage;
import  java.io.ByteArrayOutputStream;
import  java.io.DataOutputStream;
import  java.io.File;
import  java.io.FileOutputStream;
import  java.io.IOException;

import  javax.imageio.ImageIO;
import  javax.servlet.ServletException;
import  javax.servlet.http.HttpServlet;
import  javax.servlet.http.HttpServletRequest;
import  javax.servlet.http.HttpServletResponse;

import  cn.myapps.constans.Environment;
import  cn.myapps.util.sequence.Sequence;

/**
 * Servlet implementation class onLineTakePhotoServlet
  */
public   class  onLineTakePhotoServlet  extends  HttpServlet {
  private   static   final   long  serialVersionUID  =   1L ;
    
  private  Environment env  =  Environment.getInstance();
 
  public   void  doGet(HttpServletRequest request, HttpServletResponse response)    
  throws  ServletException, IOException {    
 processRequest(request, response);    
 }    
   
  public   void  doPost(HttpServletRequest request, HttpServletResponse response)    
   throws  ServletException, IOException {    
 processRequest(request, response);    
 }    
 
  public   void  processRequest(HttpServletRequest request, HttpServletResponse response)

     throws  ServletException, IOException {
  response.setContentType( " text/html;charset=UTF-8 " );   
        response.setHeader( " Pragma " ,  " No-cache " );   
        response.setHeader( " Cache-Control " ,  " no-cache " );   
        response.setDateHeader( " Expires " ,  0 );   
  
        String bitmap_data  =  request.getParameter( " bitmap_data " );   
         int  width  =  Integer.parseInt(request.getParameter( " width " ));   
         int  height  =  Integer.parseInt(request.getParameter( " height " ));   
        BufferedImage img  =   new  BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);   
   try  {   
             int  w  =  width;   
             int  h  =  height;   
             int [] pixels  =   new   int [w  *  h];   
            String[] m_tempPics  =  bitmap_data.split( " , " );   
             for  ( int  x  =   0 ; x  <  w; x ++ ) {   
                 for  ( int  y  =   0 ; y  <  h; y ++ ) {   
                    Long pic_argb  =  Long.parseLong(m_tempPics[x  *  h  +  y]);   
                     int  a  =  ( int ) (pic_argb  >>   24   &   0xFF );   
                     int  r  =  ( int ) (pic_argb  >>   16   &   0xFF );   
                     int  g  =  ( int ) (pic_argb  >>   8   &   0xFF );   
                     int  b  =  ( int ) (pic_argb  &   0xFF );   
                    pixels[y  *  w  +  x]  =   new  Color(r, g, b, a).getRGB();   
                }   
            }   
            img.setRGB( 0 ,  0 , w, h, pixels,  0 , w);   
            img.flush();   
            ByteArrayOutputStream bao  =   new  ByteArrayOutputStream();   
            ImageIO.write(img,  " jpg " , bao);   
             byte [] data  =  bao.toByteArray();  
            String filePath  =  env.getRealPath( " /uploads/photo " );
             // 判断路径是否存在,若不存在则创建路径
            File upDir  =   new  File(filePath);
             if  ( ! upDir.exists())
            {
                upDir.mkdir();
            }
             // 生成随机文件名
            String saveName  =  Sequence.getSequence();
            String fileName  =  saveName  +   " .jpg " ;
             // 写图片
            File f  =   new  File(filePath + " \\ "   +  fileName);
      DataOutputStream dos  =   new  DataOutputStream( new  FileOutputStream(f));
      dos.write(data);
      dos.flush();
      dos.close();
      response.setContentType( " text/xml " );   
            response.getWriter().write( " /uploads/photo/ "   +  fileName);   
        }
         catch (Exception ex)
        {
         response.setContentType( " text/xml " );   
            response.getWriter().write( " 保存失败 " );   
        }
 }

}