java实现屏幕捕捉程序

怼烎@ 2022-08-07 08:43 106阅读 0赞

package packclass1;
    
    import java.awt.*;
    import java.awt.event.*;
    import java.awt.image.*;
    
    import javax.swing.JFrame;
    import javax.swing.JButton;
    import javax.swing.JPanel;
    import javax.swing.WindowConstants;
    
    public class ScreenCapture extends JFrame implements ActionListener {
    	private ScreenCaptureUtil scrCaptureUtil = null;
    	private PaintCanvas canvas = null;
    	
    	public Class1(){
    		super("Screen Capture");
    		init();
    	}
    	
    	public void init(){
    		scrCaptureUtil = new ScreenCaptureUtil();
    		canvas = new PaintCanvas(scrCaptureUtil);
    		Container c = this.getContentPane();
    		c.setLayout(new BorderLayout());
    		c.add(canvas,BorderLayout.CENTER);
    		JButton capButton = new JButton("抓屏");
    		c.add(capButton,BorderLayout.SOUTH);
    		capButton.addActionListener(this);
    		this.setSize(400, 400);
    		this.setVisible(true);
    		this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    	}
    	public void actionPerformed(ActionEvent e){
    		canvas.drawScreen();
    	}
    	public static void main(String[] args){
    		new ScreenCapture();
    	}
    }
    
    class ScreenCaptureUtil{
    	private Robot robot = null;
    	private Rectangle scrRect =null;
    	
    	public ScreenCaptureUtil(){
    		try{
    			robot = new Robot();
    		}catch(Exception e){
    			System.out.println(e.toString());
    		}
    		Dimension scrSize = Toolkit.getDefaultToolkit().getScreenSize();
    		scrRect = new Rectangle(0,0,scrSize.width,scrSize.height);
    	}
    	public BufferedImage captureScreen(){
    		BufferedImage scrImg = null;
    		try{
    			scrImg = robot.createScreenCapture(scrRect);
    		}catch(Exception e){
    			System.out.println(e.toString());
    		}
    		return scrImg;
    	}
    }
    
    class PaintCanvas extends JPanel{
    	private ScreenCaptureUtil scrCaptureUtil = null;
    	private BufferedImage scrImg = null;
    	
    	public PaintCanvas(ScreenCaptureUtil scrCaptureUtil){
    		this.scrCaptureUtil = scrCaptureUtil;6
    	}
    	protected void paintComponent(Graphics g){
    		if(scrImg !=null){
    			int iWidth = this.getWidth();
    			int iHeight = this.getHeight();
    			g.drawImage(scrImg, 0, 0, iWidth, iHeight, 0,0,scrImg.getWidth(),scrImg.getHeight(),null);
    		}
    	}
    	public void drawScreen(){
    		Graphics g = this.getGraphics();
    		scrImg=scrCaptureUtil.captureScreen();
    		if(scrImg != null){
    			this.paintComponent(g);
    		}
    		g.dispose();
    	}
    }

本程序来自桂颖，任显衡的《java变成兵书》