Java屏幕截图工具 捕获屏幕详解编程语言

private ScreenCaptureUtil scrCaptureUtil = null;// 捕获屏幕的工具类 private PaintCanvas canvas = null;// 画布，用于画捕获到的屏幕图像 public ScreenCaptureFrame() { super("Screen Capture"); init(); /** * 初始化 private void init() { scrCaptureUtil = new ScreenCaptureUtil();// 创建抓屏工具 canvas = new PaintCanvas(scrCaptureUtil);// 创建画布 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) {// 点击“抓屏”按钮时，在画布上画屏幕图像 canvas.drawScreen(); public static void main(String[] args) { new ScreenCaptureFrame(); * 抓屏工具类 class ScreenCaptureUtil { private Robot robot = null;// 抓屏的主要工具类 private Rectangle scrRect = null;// 屏幕的矩形图像 public ScreenCaptureUtil() { try { robot = new Robot();// 创建一个抓屏工具 } catch (Exception ex) { System.out.println(ex.toString()); // 获取屏幕的矩形图像 Dimension scrSize = Toolkit.getDefaultToolkit().getScreenSize(); scrRect = new Rectangle(0, 0, scrSize.width, scrSize.height); /** * 抓屏方法 * @return 返回一个图像 public BufferedImage captureScreen() { BufferedImage scrImg = null; try { scrImg = robot.createScreenCapture(scrRect);// 抓的是全屏图 } catch (Exception e) { System.out.println(e.toString()); return scrImg; * 画布类，用于显示抓屏得到的图像 class PaintCanvas extends JPanel { private ScreenCaptureUtil scrCaptureUtil = null;// 抓屏工具 private BufferedImage scrImg = null;// 待画的图像 public PaintCanvas(ScreenCaptureUtil screenUtil) { this.scrCaptureUtil = screenUtil; /** * 重载JPanel的paintComponent，用于画背景 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); /** * 画屏幕图像的方法 public void drawScreen() { Graphics g = this.getGraphics(); scrImg = scrCaptureUtil.captureScreen();// 抓屏，获取屏幕图像 if (scrImg != null) { this.paintComponent(g);// 画图 g.dispose();// 释放资源 }

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