用于现场拍照，生成照片，主要用到Java Media Framework(JMF)。
首先到SUN下载最新的JMF，然后安装。http://java.sun.com/products/java-media/jmf/index.jsp
或者在我的附件里面找到JMF下载安装。
然后，说一下需求
1． 用摄像头拍照
2． 按下拍照按钮，获取摄像头内的图像
3． 保存为本地图像为jpg格式，不得压缩画质
4. 如果对当前照片不满意，可以重新拍摄。
相信也是大家最感兴趣的部分也就是如何让一个摄像头工作，并拍下一张照片了。
下面是一个已经实现了的示例。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Panel;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.File;
import javax.media.Buffer;
import javax.media.CannotRealizeException;
import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.NoPlayerException;
import javax.media.Player;
import javax.media.control.FrameGrabbingControl;
import javax.media.format.VideoFormat;
import javax.media.util.BufferToImage;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import com.sun.image.codec.jpeg.ImageFormatException;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class GetPhoto extends JPanel implements ActionListener{
private CaptureDeviceInfo captureDeviceInfo=null;
private MediaLocator mediaLocator=null;
private static Player player=null;
private ImagePanel imagePanel=null;
private JButton jbok,jbcancel;
private Buffer buffer=null;
private VideoFormat videoFormat=null;
private BufferToImage bufferToImage=null;
private Image image=null;
private JPanel jp=new JPanel();
public GetPhoto()
{
//setLayout(new BorderLayout());
this.setLayout(null);
setSize(300,500);
String str="vfw:Microsoft WDM Image Capture (Win32):0";
captureDeviceInfo=CaptureDeviceManager.getDevice(str);
mediaLocator=new MediaLocator("vfw://0");
imagePanel=new ImagePanel();
jbok=new JButton("拍 照");
jbcancel=new JButton("重 拍");
jbok.addActionListener(this);
jbcancel.addActionListener(this);
try {
player=Manager.createRealizedPlayer(mediaLocator);
player.start();
Component comp;
if((comp=player.getVisualComponent())!=null)
comp.setBounds(0, 0, 240, 180);
this.add(comp);
} catch (NoPlayerException e)
{
e.printStackTrace();
} catch (CannotRealizeException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
jp.add(jbok);
jp.add(jbcancel);
jp.add(imagePanel);
jp.setBounds(0, 180, 240, 200);
this.add(jp);
}
public void print(Graphics g)
{
super.print(g);
g.setColor(new Color(255,0,0));
g.drawLine(0, 0, 100, 100);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==jbok)
{
FrameGrabbingControl fgc=(FrameGrabbingControl)player.getControl("javax.media.control.FrameGrabbingControl");
buffer=fgc.grabFrame();
bufferToImage=new BufferToImage((VideoFormat)buffer.getFormat());
image=bufferToImage.createImage(buffer);
imagePanel.setImage(image);
saveImage(image,"temp.jpg");
}
if(e.getSource()==jbcancel)
{
imagePanel.setImage(null);
}
}
public static void saveImage(Image image,String path)
{
BufferedImage bi=new BufferedImage(image.getWidth(null),image.getHeight(null),BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(image, null, null);
FileOutputStream fos=null;
try {
fos=new FileOutputStream(path);
} catch (FileNotFoundException e)
{
e.printStackTrace();
}
JPEGImageEncoder je=JPEGCodec.createJPEGEncoder(fos);
JPEGEncodeParam jp=je.getDefaultJPEGEncodeParam(bi);
jp.setQuality(1f, false);
je.setJPEGEncodeParam(jp);
try {
je.encode(bi);
fos.close();
} catch (ImageFormatException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
}
public static File getImage()
{
File f=new File("temp.jpg");
return f;
}
class ImagePanel extends Panel
{
public Image myimg = null;
public ImagePanel()
{
setLayout(null);
setSize(240,180);
}
public void setImage(Image img)
{
this.myimg = img;
repaint();
}
public void paint(Graphics g)
{
if (myimg != null)
{
g.drawImage(myimg, 0, 0, this);
}
}
}
public static void main(String[] args)
{
JFrame f = new JFrame("FirstCapture");
GetPhoto cf = new GetPhoto();
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
player.close();
System.exit(0);}});
f.add("Center",cf);
f.pack();
f.setBounds(100,100,240,550);
f.setVisible(true);
}
}
