java屏幕快照

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;

/*******************************************************************************
* 该JavaBean可以直接在其他Java应用程序中调用，实现屏幕的"拍照" This JavaBean is used to snapshot the
* GUI in a Java application! You can embeded it in to your java application
* source code, and us it to snapshot the right GUI of the application
* 
* 
******************************************************************************/

class GuiCamera
{
    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;
     }

    /***********************************************************************
      * @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;
     }

    /***********************************************************************
      * 对屏幕进行拍照 snapShot the Gui once
      **********************************************************************/
    public void snapShot()
     {
    try
     {
        // 拷贝屏幕到一个BufferedImage对象screenshot
         BufferedImage 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! ");
     } catch (Exception ex)
     {
         System.out.println(ex);
     }
     }

    public static void main(String[] args)
     {
     GuiCamera cam = new GuiCamera("Test", "png");
     cam.snapShot();
     }
}