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Java實例:JAVA實現屏幕抓圖 遠程桌面控制

來源:互聯網  2008-10-30 08:14:15  評論

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);

}

/**得到捕捉後的BufferedImage*/

public BufferedImage getPickedImage() {

return pickedImage;

}

/**得到捕捉後的Icon*/

public ImageIcon getPickedIcon() {

return new ImageIcon(getPickedImage());

}

/**儲存爲一個文件,爲PNG格式
*@deprecated

*replaced by saveAsPNG(File file)

**/

@Deprecated

public void saveToFile(File file) throws IOException{

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

}

/**儲存爲一個文件,爲PNG格式*/

public void saveAsPNG(File file) throws IOException {

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

}

/**儲存爲一個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;

private int recX,recY,recH,recW; //截取的圖像

private boolean isFirstPoint = true;

private BackgroundImage labFullScreenImage = new BackgroundImage();

private Robot robot;

private BufferedImage fullScreenImage;

private BufferedImage pickedImage;

private String defaultImageFormater = "png";

private JDialog dialog = new JDialog();

}

/**顯示圖片的Label*/

class BackgroundImage extends JLabel{

public void paintComponent(Graphics g) {

super.paintComponent(g);

g.drawRect(x,y,w,h);

String area = Integer.toString(w)+" * "+ Integer.toString(h);

g.drawString(area,x+(int)w/2-15,y+(int)h/2);

g.drawLine(lineX,0,lineX,getHeight());

g.drawLine(0,lineY,getWidth(),lineY);

}

public void drawRectangle(int x,int y,int width,int height) {

this.x = x;

this.y = y;

h = height;

w = width;

repaint();

}

public void drawCross(int x,int y) {

lineX = x;

lineY = y;

repaint();

}

int lineX,lineY;

int x,y,h,w;

}

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); } /**得到捕捉後的BufferedImage*/ public BufferedImage getPickedImage() { return pickedImage; } /**得到捕捉後的Icon*/ public ImageIcon getPickedIcon() { return new ImageIcon(getPickedImage()); } /**儲存爲一個文件,爲PNG格式 [url=mailto:*@deprecated]*@deprecated[/url] *replaced by saveAsPNG(File file) **/ @Deprecated public void saveToFile(File file) throws IOException{ ImageIO.write(getPickedImage(),defaultImageFormater,file); } /**儲存爲一個文件,爲PNG格式*/ public void saveAsPNG(File file) throws IOException { ImageIO.write(getPickedImage(),"png",file); } /**儲存爲一個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; private int recX,recY,recH,recW; //截取的圖像 private boolean isFirstPoint = true; private BackgroundImage labFullScreenImage = new BackgroundImage(); private Robot robot; private BufferedImage fullScreenImage; private BufferedImage pickedImage; private String defaultImageFormater = "png"; private JDialog dialog = new JDialog(); } /**顯示圖片的Label*/ class BackgroundImage extends JLabel{ public void paintComponent(Graphics g) { super.paintComponent(g); g.drawRect(x,y,w,h); String area = Integer.toString(w)+" * "+ Integer.toString(h); g.drawString(area,x+(int)w/2-15,y+(int)h/2); g.drawLine(lineX,0,lineX,getHeight()); g.drawLine(0,lineY,getWidth(),lineY); } public void drawRectangle(int x,int y,int width,int height) { this.x = x; this.y = y; h = height; w = width; repaint(); } public void drawCross(int x,int y) { lineX = x; lineY = y; repaint(); } int lineX,lineY; int x,y,h,w; }
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