已经可以实现录屏了，但是需要拉伸窗口

package a;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.Timer;

public class Main extends JFrame implements Runnable {
	// Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
	// Rectangle rectangle = new Rectangle(dimension);
	// Robot robot = new Robot();
	// BufferedImage bufferedImage = robot.createScreenCapture(rectangle);
	// ImageIcon imageIcon = new ImageIcon(bufferedImage);
	// JLabel jl = new JLabel(imageIcon);
	Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
	Rectangle rectangle = new Rectangle(0, 0, 1000, 700);
	Robot robot = new Robot();
	BufferedImage bufferedImage = robot.createScreenCapture(rectangle);
	ImageIcon imageIcon = new ImageIcon(bufferedImage);
	JLabel jl = new JLabel(imageIcon);

	public Main() throws Exception {

		this.add(jl);

	}

	public static void main(String[] args) throws Exception {
		Main m = new Main();
		m.setBounds(0, 0, 1000, 700);
		m.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		m.setExtendedState(JFrame.MAXIMIZED_BOTH);
		m.setTitle("彩虹圣经-----E向上滚动,D向下滚动,空格向下滚动,1~9向后滚动,1速度最慢,9速度最快");
		// m.setUndecorated(true);
		m.setVisible(true);
		m.run();
	}

	public void run() {

		bufferedImage = robot.createScreenCapture(rectangle);
		imageIcon.setImage(bufferedImage);

		jl.setIcon(imageIcon);
		jl.repaint();
		System.out.println(132);
		Thread t = new Thread(this);

		t.start();
	}

	public void paintComponent(Graphics g) {
		super.paintComponents(g);
		imageIcon.setImage(bufferedImage);
	}

}