//http://www.chinaitpower.com/A200508/2005-08-05/183492.html

package camera;

import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.*;
import java.awt.*;

/*******************************************************************
* 該JavaBean可以直接在其他Java應(yīng)用程序中調(diào)用，實現(xiàn)屏幕的"拍照"
*******************************************************/

public class GuiCamera {
	
	private String fileName;  //文件的前綴
	private String defaultName = "GuiCamera";
	static int serialNum=0;
	private String imageFormat; //圖像文件的格式
	private String defaultImageFormat="png";
	Dimension d=Toolkit.getDefaultToolkit().getScreenSize();
/****************************************************************
* 默認的文件前綴為GuiCamera，文件格式為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;
}
/****************************************************************
* @param s the surname of the snapshot file
* @param format the format of the  image file,
* it can be "jpg" or "png"
* 本構(gòu)造支持JPG和PNG文件的存儲
****************************************************************/
public GuiCamera(String s,String format) {
fileName = s;
imageFormat = format;
}
/****************************************************************
* 對屏幕進行拍照
* snapShot the Gui once
****************************************************************/
public void snapShot() {
	try {
		//拷貝屏幕到一個BufferedImage對象screenshot
		BufferedImage screenshot = (new Robot()).createScreenCapture(new
		Rectangle(0, 0, (int) d.getWidth(), (int) d.getHeight()));
		serialNum++;
		//根據(jù)文件前綴變量和文件格式變量，自動生成文件名
		String name=fileName+String.valueOf(serialNum)+"."+imageFormat;
		File f = new File(name);
		System.out.print("Save File "+name);
		//將screenshot對象寫入圖像文件
		ImageIO.write(screenshot, imageFormat, f);
		System.out.print("..Finished!\n");
		}
		catch (Exception ex) {
		System.out.println(ex);
	}
  }
}