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    JAVA實現屏幕抓圖 遠程桌面控制發布者:本站     時間:2020-05-06 16:05:48

    主要使用的是java.util.Robot類來捕獲屏幕,可以實現對屏幕一個矩形區域的捕獲,通過這個類,我們也可以實現一個遠程桌面控制的程序。

    package com.qiu.util;

    import java.io.*;

    import java.net.*;

    import javax.swing.*;

    import java.awt.*;

    import java.awt.event.*;

    import java.awt.image.*;

    import javax.imageio.*;

    import java.io.*;


    /**@Author Qiu_BaiChao

    *一個簡單的屏幕抓圖

    *

    **/


    public class ScreenCapture {

    //test main

    public static void main(String[] args) throws Exception{

    String userdir = System.getProperty("user.dir");

    File tempFile = new File("d:","temp.png");

    ScreenCapture capture = ScreenCapture.getInstance();

    capture.captureImage();

    JFrame frame = new JFrame();

    JPanel panel = new JPanel();

    panel.setLayout(new BorderLayout());

    JLabel imagebox = new JLabel();

    panel.add(BorderLayout.CENTER,imagebox);

    imagebox.setIcon(capture.getPickedIcon());

    capture.saveToFile(tempFile);

    capture.captureImage();

    imagebox.setIcon(capture.getPickedIcon());

    frame.setContentPane(panel);

    frame.setSize(400,300);

    frame.show();

    System.out.println("Over");

    }


    private ScreenCapture() {


    try{

    robot = new Robot();

    }

    catch(AWTException e) {

    System.err.println("Internal Error: " + e);

    e.printStackTrace();

    }

    JPanel cp = (JPanel)dialog.getContentPane();

    cp.setLayout(new BorderLayout());

    labFullScreenImage.addMouseListener(new MouseAdapter() {

    public void mouseReleased(MouseEvent evn) {

    isFirstPoint = true;

    pickedImage = fullScreenImage.getSubimage(recX,recY,recW,recH);

    dialog.setVisible(false);

    }

    });


    labFullScreenImage.addMouseMotionListener(new MouseMotionAdapter() {

    public void mouseDragged(MouseEvent evn) {

    if(isFirstPoint) {

    x1 = evn.getX();

    y1 = evn.getY();

    isFirstPoint = false;

    }

    else {

    x2 = evn.getX();

    y2 = evn.getY();

    int maxX = Math.max(x1,x2);

    int maxY = Math.max(y1,y2);

    int minX = Math.min(x1,x2);

    int minY = Math.min(y1,y2);

    recX = minX;

    recY = minY;

    recW = maxX-minX;

    recH = maxY-minY;

    labFullScreenImage.drawRectangle(recX,recY,recW,recH);

    }

    }


    public void mouseMoved(MouseEvent e) {

    labFullScreenImage.drawCross(e.getX(),e.getY());

    }

    });


    cp.add(BorderLayout.CENTER,labFullScreenImage);

    dialog.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));

    dialog.setAlwaysOnTop(true);

    dialog.setMaximumSize(

    Toolkit.getDefaultToolkit().getScreenSize());

    dialog.setUndecorated(true);

    dialog.setSize(dialog.getMaximumSize());

    dialog.setModal(true);

    }

    //Singleton Pattern

    public static ScreenCapture getInstance() {

    return defaultCapturer;

    }

    /**捕捉全屏慕*/

    public Icon captureFullScreen() {

    fullScreenImage = robot.createScreenCapture(new Rectangle(

    Toolkit.getDefaultToolkit().getScreenSize()));

    ImageIcon icon = new ImageIcon(fullScreenImage);

    return icon;

    }

    /**捕捉屏幕的一個矯形區域

    */

    public void captureImage() {

    fullScreenImage = robot.createScreenCapture(new Rectangle(

    Toolkit.getDefaultToolkit().getScreenSize()));

    ImageIcon icon = new ImageIcon(fullScreenImage);

    labFullScreenImage.setIcon(icon);

    dialog.setVisible(true);

    }

    /**得到捕捉后的BufferedImage*/

    public BufferedImage getPickedImage() {

    return pickedImage;

    }

    /**得到捕捉后的Icon*/

    public ImageIcon getPickedIcon() {

    return new ImageIcon(getPickedImage());

    }

    /**儲存為一個文件,為PNG格式

    *@deprecated

    *replaced by saveAsPNG(File file)

    **/

    @Deprecated

    public void saveToFile(File file) throws IOException{

    ImageIO.write(getPickedImage(),defaultImageFormater,file);

    }

    /**儲存為一個文件,為PNG格式*/

    public void saveAsPNG(File file) throws IOException {

    ImageIO.write(getPickedImage(),"png",file);

    }

    /**儲存為一個JPEG格式圖像文件*/

    public void saveAsJPEG(File file) throws IOException {

    ImageIO.write(getPickedImage(),"JPEG",file);

    }


    /**寫入一個OutputStream*/

    public void write(OutputStream out) throws IOException{

    ImageIO.write(getPickedImage(),defaultImageFormater,out);

    }


    //singleton design pattern

    private static ScreenCapture defaultCapturer = new ScreenCapture();

    private int x1,y1,x2,y2;



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