据说这段代码可以获取电脑屏幕，实现抓屏效果

package org.csmn.app;import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;import javax.imageio.ImageIO;/*** <p>* GuiCamera類主要用於-捕獲電腦屏幕.* </p>* <p>* 創建時間 2012-3-28 - 下午09:28:38* </p>* <blockquote>* <h4>歷史修改記錄</h4>* <ul>* <li>修改人 修改時間 修改描述* </ul>* </blockquote>* <p>* copyright cdthgk 2010-2012, all rights reserved.* </p>* * @author  車水碼農* @author  cdthgk r&d* @since  1.0* @version 1.0*/
public class GuiCamera {private static final org.apache.commons.logging.Log log = org.apache.commons.logging.LogFactory.getLog(GuiCamera.class);private String fileName; //文件的前缀private String defaultName = "GuiCamera";static int serialNum = 0;private String imageFormat; //图像文件的格式private String defaultImageFormat = "png";Dimension d = Toolkit.getDefaultToolkit().getScreenSize();/***************************************************************** 默认的文件前缀为GuiCamera，文件格式为PNG格式* The default construct will use the default * Image file surname "GuiCamera", * and default image format "png"****************************************************************/public GuiCamera() {fileName = defaultName;imageFormat = defaultImageFormat;log.info("Constructor");}/***************************************************************** @param s the surname of the snapshot file* @param format the format of the  image file, * it can be "jpg" or "png"* 本构造支持JPG和PNG文件的存储****************************************************************/public GuiCamera(String s, String format) {fileName = s;imageFormat = format;}/*** <p>* snapShot方法-对屏幕进行拍照* snapShot the Gui once.* </p>* <p>* 創建人 車水碼農 創建時間 2012-3-28 - 下午10:54:20* </p>* <blockquote>* <h4>歷史修改記錄</h4>* <ul>* <li>修改人 修改時間 修改描述* </ul>* </blockquote>*/public void snapShot() {try {//拷贝屏幕到一个BufferedImage对象screenshotBufferedImage screenshot = (new Robot()).createScreenCapture(new Rectangle(0, 0, (int) d.getWidth(), (int) d.getHeight()));serialNum++;//根据文件前缀变量和文件格式变量，自动生成文件名String name = fileName + String.valueOf(serialNum) + "."+ imageFormat;File f = new File(name);System.out.print("Save File " + name);//将screenshot对象写入图像文件ImageIO.write(screenshot, imageFormat, f);System.out.print("..Finished!\n");} catch (Exception ex) {System.out.println(ex);}}/*** <p>* main方法-.* </p>* <p>* 創建人 車水碼農 創建時間 2012-3-28 - 下午09:28:38* </p>* <blockquote>* <h4>歷史修改記錄</h4>* <ul>* <li>修改人 修改時間 修改描述* </ul>* </blockquote>* @param args*/public static void main(String[] args) {GuiCamera cam= new GuiCamera("d:\\Hello", "png");//cam.snapShot();}
}