JAVA调用摄像头

public class CaptureDemo {
	private static int num = 0;

	public static void main(String[] args) throws IOException {
		final Webcam webcam = Webcam.getDefault();
		webcam.setViewSize(WebcamResolution.VGA.getSize());
		WebcamPanel panel = new WebcamPanel(webcam);
		panel.setFPSDisplayed(true);
		panel.setDisplayDebugInfo(true);
		panel.setImageSizeDisplayed(true);
		panel.setMirrored(true);

		final JFrame window = new JFrame("摄像头");
		window.addWindowListener(new WindowAdapter() {

			@Override
			public void windowClosed(WindowEvent e) {
				webcam.close();
				window.dispose();
			}
		});
		// window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		final JButton button = new JButton("截图");
		window.add(panel, BorderLayout.CENTER);
		window.add(button, BorderLayout.SOUTH);
		window.setResizable(true);
		window.pack();
		window.setVisible(true);
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				button.setEnabled(false);
				String fileName = "D://" + num;
				WebcamUtils.capture(webcam, fileName, ImageUtils.FORMAT_PNG);
				SwingUtilities.invokeLater(new Runnable() {

					@Override
					public void run() {
						JOptionPane.showMessageDialog(null, "截图成功");
						button.setEnabled(true);
						num++;
						return;
					}
				});
			}
		});
	}
}

webcam-capture这个神奇的jar包