Get a screen capture and save it as a JPEG ,java实现抓屏功能

import java.awt.AWTException;
import java.awt.Robot;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;

class ScreenCapture {
public static void main(String args[]) throws
AWTException, IOException {
// capture the whole screen
BufferedImage screencapture = new Robot().createScreenCapture(
new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()) );

// Save as JPEG
File file = new File("screencapture.jpg");
ImageIO.write(screencapture, "jpg", file);

// Save as PNG
// File file = new File("screencapture.png");
// ImageIO.write(screencapture, "png", file);
}
}

To capture a specific area

BufferedImage screencapture = new Robot().createScreenCapture(
new Rectangle( 15, 15, 150, 150));

To capture a specific visual object

BufferedImage image = new Robot().createScreenCapture(
new Rectangle( myframe.getX(), myframe.getY(),
myframe.getWidth(), myframe.getHeight() ) );