断断续续弄了差不多两个星期，终于把这个弄好了，在我的电脑上以及朋友的xp系统上测试成功！

下面不多说，直接上代码。

说明：电脑必须装好jmf，并且用JMStudio能正常打开摄像头，否则运行不了，具体是什么原因我也不太清楚。

//已成功实现功能，获取当前摄像头并且拍照。
//照片存在E：\photo目录下

import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.RenderedImage;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Date;

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 com.sun.media.jai.codec.BMPEncodeParam;
import com.sun.media.jai.codec.ImageCodec;
import com.sun.media.jai.codec.ImageEncoder;




public class CapturePicture extends JFrame implements ActionListener{
	
	private static CapturePicture jframe=new CapturePicture();
	private JPanel showPhone=new JPanel();	//用来接受摄像头数据
	private JPanel bpanel=new JPanel();
	private JButton button=new JButton("拍照");
	//摄像头驱动
	private CaptureDeviceInfo captureDeviceInfo=null;
	private MediaLocator mediaLocator=null;
	private static Player player=null;
	private Buffer buffer=null;
	private VideoFormat videoFormat=null;
	private BufferToImage bufferToImage=null;
	private Image image=null;
	
	
	
	
	//构造器
	private CapturePicture()
	{
		
	}
	protected void Init()
	{
		jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jframe.setBounds(200,100,600,600);
		jframe.setVisible(true);
		jframe.setTitle("拍照小程序");
		jframe.setResizable(true);
		jframe.setLayout(null);//绝对布局
		jframe.add(showPhone);
		jframe.add(bpanel);
		bpanel.setBounds(0,500,100,100);
		bpanel.setLayout(new FlowLayout(FlowLayout.CENTER,10,10));
		bpanel.add(button);	
		button.addActionListener(this);
		
		
		String str="vfw:Microsoft WDM Image Capture (Win32):0";
		captureDeviceInfo=CaptureDeviceManager.getDevice(str);
		mediaLocator=new MediaLocator("vfw://0");
		
		try {
			player=Manager.createRealizedPlayer(mediaLocator);
			player.start();
			Component comp;
			if((comp=player.getVisualComponent())!=null)
			comp.setBounds(0, 0, 700, 500);
			this.add(comp);
			   
			
			 
		} catch (NoPlayerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (CannotRealizeException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		//创建照片所用的文件夹
		File photo=new File("E:\\","photo");
		photo.mkdir();
		
		
		
	}
	
	public static CapturePicture getCP()
	{
		return jframe;
	}
	//获取照片
	private void takePhoto()
	{	 
		//获取照片
		FrameGrabbingControl fgc=(FrameGrabbingControl)player.getControl("javax.media.control.FrameGrabbingControl");
		buffer=fgc.grabFrame();
		bufferToImage=new BufferToImage((VideoFormat)buffer.getFormat());
		image=bufferToImage.createImage(buffer);
		OutputStream out=null;
		Date date=new Date();
		Long dtime=date.getTime();
		
		
		
		
		
		try {
			out=new FileOutputStream("E:\\photo\\"+dtime+".BMP");
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			
			e.printStackTrace();
		}
		//可能是改参数的地方
		BMPEncodeParam param = new BMPEncodeParam();
		ImageEncoder enc = ImageCodec.createImageEncoder("BMP", out, param);
		try {
			enc.encode((RenderedImage) image);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		try {
			out.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
			
			
	}
		
		
	
	
	
	
	public static void main(String args[])
	{
		CapturePicture cp=CapturePicture.getCP();
		cp.Init();
	}
	@Override
	public void actionPerformed(ActionEvent arg0) {
		// TODO Auto-generated method stub
		takePhoto();
		
	}

	
}