|
|
主要实现代码如下所示
：
public class MainClass extends JFrame implements ActionListener
{
/**
* @param args
*/
private ScreenCapture scrCapture = null;
private PaintCanvas canvas = null;
public MainClass()
{
super("Screen Capture");
init();
}
public void actionPerformed(ActionEvent e)
{
canvas.drawScreen();
}
private void init()
{
scrCapture = new ScreenCapture();
canvas = new PaintCanvas(scrCapture);
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 static void main(String[] args)
{
// TODO Auto-generated method stub
System.out.println("System started");
new MainClass();
System.out.println("window is visible");
}
}
class ScreenCapture
{
/**
* @param args
*/
private Robot robot = null;
private Rectangle scrRect = null;
public ScreenCapture()
{
try
{
robot = new Robot();
}
catch (Exception ex)
{
System.out.println(ex.toString());
}
Dimension scrSize = Toolkit.getDefaultToolkit().getScreenSize(); // 桌面屏幕尺寸
scrRect = new Rectangle(0, 0, scrSize.width, scrSize.height);
}
public BufferedImage captureScreen()
{
BufferedImage bufImg = null;
try
{
bufImg = robot.createScreenCapture(scrRect);
}
catch (Exception e)
{
System.out.println(e.toString());
}
return bufImg;
}
}
class PaintCanvas extends JPanel
{
private ScreenCapture screen = null;
private BufferedImage scrImg = null;
public PaintCanvas(ScreenCapture screen)
{
this.screen = screen;
}
protected void paintComponent(Graphics g)
{
// TODO Auto-generated method stub
// BufferedImage scrImg = screen.captureScreen();
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 = screen.captureScreen();
if (scrImg != null)
{
this.paintComponent(g);
}
g.dispose();
}
}
|
|
