java实现摄像头截图功能

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( "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

//    medialocator locator = null;

//    globalcapturedeviceplugger.addcapturedevices();

//    vector vectordevices = capturedevicemanager.getdevicelist(null);

//    if (vectordevices == null || vectordevices.size() == 0)

//    {

//      system.out.println("没有摄像头===");

//      return;

//    }

//    //选择第一个摄像头设备

//    for ( int i = 0; i < vectordevices.size(); i++ )

//    {

//      capturedeviceinfo infocapturedevice = (capturedeviceinfo) vectordevices.get(i);

//      system.out.println("设备名===============" + infocapturedevice.getname());

//      //选择第一个设备为程序使用,如果存在多个设备时，则第一个可能不是摄像头

//      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( "截图" );

     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 );

   }

}