Java屏幕截图工具 捕获屏幕，java屏幕截图,import java.

Java屏幕截图工具 捕获屏幕，java屏幕截图,import java.

import java.awt.BorderLayout;import java.awt.Container;import java.awt.Dimension;import java.awt.Graphics;import java.awt.Rectangle;import java.awt.Robot;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.image.BufferedImage;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.WindowConstants;/** * 捕获屏幕，屏幕截图工具 */public class ScreenCaptureFrame extends JFrame implements ActionListener {    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    }}