java使用电脑摄像头识别二维码

package com.pengo.capture;import javax.swing.JFrame;import java.awt.BorderLayout;import java.awt.Dimension;import java.awt.Graphics2D;import java.awt.image.BufferedImage;import java.io.InputStream;import javax.media.MediaLocator;import javax.swing.JPanel;import javazoom.jl.player.Player;import com.google.zxing.BinaryBitmap;import com.google.zxing.LuminanceSource;import com.google.zxing.MultiFormatReader;import com.google.zxing.Result;import com.google.zxing.common.HybridBinarizer; import net.sf.fmj.ui.application.CaptureDeviceBrowser;import net.sf.fmj.ui.application.ContainerPlayer;import net.sf.fmj.ui.application.PlayerPanelPrefs;public class CameraFrame2 extends JFrame{  private static int num = 0;  public CameraFrame2() throws Exception{   this.setTitle("摄像头截图应用");   this.setSize(480, 500);   this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   final JPanel cameraPanel = new JPanel();   this.getContentPane().setLayout(new BorderLayout());   this.getContentPane().add(cameraPanel, BorderLayout.CENTER);   ContainerPlayer containerPlayer = new ContainerPlayer(cameraPanel);   MediaLocator locator = CaptureDeviceBrowser.run(null); //弹出摄像头设备选择    PlayerPanelPrefs prefs = new PlayerPanelPrefs();   containerPlayer.setMediaLocation(locator.toExternalForm(), prefs.autoPlay);      new Thread() {    public void run() {     while (true) {      try {      Thread.sleep(1000);       Dimension imageSize = cameraPanel.getSize();       BufferedImage image = new BufferedImage(         imageSize.width, imageSize.height,         BufferedImage.TYPE_INT_ARGB);       Graphics2D g = image.createGraphics();       cameraPanel.paint(g);       g.dispose();       LuminanceSource source = new BufferedImageLuminanceSource(         image);       BinaryBitmap bitmap = new BinaryBitmap(        new HybridBinarizer(source));       Result result;       result = new MultiFormatReader().decode(bitmap);       System.out.println("二维码====:" + result.getText());       InputStream is = CameraFrame.class.getClassLoader().getResourceAsStream("resource/beep.mp3");       Player player = new Player(is);       player.play();      } catch (Exception re) {       re.printStackTrace();      }     }    }   }.start();  }    public static void main(String[] args) throws Exception{   CameraFrame2 camera = new CameraFrame2();   camera.setVisible(true);  } }