java操作攝像頭截圖

本來sun有個jmf組件可以很方便的實現攝像頭截圖的，不過這版本后來停止更新了，當前官網最新版本為Java Media Framework (JMF) 2.1.1e，下載回來，在windows 7 32位上使用，居然不能運行，網上另外找了個jmf的替代框架fmj使用，截圖實現代碼：

package com.pengo.capture;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.media.MediaLocator;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import net.sf.fmj.ui.application.CaptureDeviceBrowser;
import net.sf.fmj.ui.application.ContainerPlayer;
import net.sf.fmj.ui.application.PlayerPanelPrefs;
public class CameraFrame extends JFrame{
    private static int num = 0;
    public CameraFrame() throws Exception{
        this.setTitle("攝像頭截圖應用");
        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);   //彈出攝像頭設備選擇
//        MediaLocator locator = null;
//        GlobalCaptureDevicePlugger.addCaptureDevices();
//        Vector vectorDevices = CaptureDeviceManager.getDeviceList(null);
//        if (vectorDevices == null || vectorDevices.size() == 0)
//        {
//            System.out.println("沒有攝像頭===");
//            return;
//        }
//        //選擇第一個攝像頭設備
//        for ( int i = 0;  i < vectorDevices.size();  i++ ) 
//        {
//            CaptureDeviceInfo infoCaptureDevice = (CaptureDeviceInfo) vectorDevices.get(i);
//            System.out.println("設備名===============" + infoCaptureDevice.getName());
//            //選擇第一個設備為程序使用,如果存在多個設備時，則第一個可能不是攝像頭
//            locator = infoCaptureDevice.getLocator();
//            break;
//        }

    PlayerPanelPrefs prefs = new PlayerPanelPrefs();
    containerPlayer.setMediaLocation(locator.toExternalForm(), prefs.autoPlay);

    JPanel btnPanel = new JPanel(new BorderLayout());
    final JTextField path = new JTextField("E:\\camera");
    path.setColumns(30);
    btnPanel.add(path, BorderLayout.WEST);
    JButton okBtn = new JButton("截圖");
    okBtn.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
             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();
                try {

                    String filePath = path.getText();
                    File file = new File(filePath);
                    if(file.exists() == false){
                        file.mkdirs();
                    }
                    ImageIO.write(image, "png", new File(file.getAbsolutePath() + "/" + num + ".png"));
                    num++;
                } catch (IOException ex) {
                    ex.printStackTrace();

                }
         }
    });
    btnPanel.add(okBtn, BorderLayout.EAST);
    this.getContentPane().add(btnPanel, BorderLayout.SOUTH);
}

public static void main(String[] args) throws Exception{
    CameraFrame camera = new CameraFrame();
    camera.setVisible(true);
}

}</pre>轉自：http://ai-longyu.iteye.com/blog/1556025</span>