Java_Win屏幕截图-白红宇

Java_Win屏幕截图

阅读量：7092 次

发布时间：2019-06-28

本文共 9346 字，大约阅读时间需要 31 分钟。

参考网址：

百度关键字 “java 截屏”

1、

网页上的代码：

package sc;import java.io.*;import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.awt.image.*;import javax.imageio.*;public class TScreenCapture{    public static void main(String[] args) throws Exception    {        String userdir = System.getProperty("user.dir");        File tempFile = new File("d:", "temp.png");        TScreenCapture capture = TScreenCapture.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 TScreenCapture()    {        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 TScreenCapture 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;    }    /** 捕捉屏幕的一个矫形区域 */    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());    }    /**     * 储存为一个文件,为PNG格式     *      * @deprecated replaced by saveAsPNG(File file)     **/    @Deprecated    public void saveToFile(File file) throws IOException {        ImageIO.write(getPickedImage(), defaultImageFormater, file);    }    /** 储存为一个文件,为PNG格式 */    public void saveAsPNG(File file) throws IOException {        ImageIO.write(getPickedImage(), "png", file);    }    /** 储存为一个JPEG格式图像文件 */    public void saveAsJPEG(File file) throws IOException {        ImageIO.write(getPickedImage(), "JPEG", file);    }    /** 写入一个OutputStream */    public void write(OutputStream out) throws IOException {        ImageIO.write(getPickedImage(), defaultImageFormater, out);    }    // singleton design pattern    private static TScreenCapture defaultCapturer = new TScreenCapture();    private int x1, y1, x2, y2;    private int recX, recY, recH, recW; // 截取的图像    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();    }/** 显示图片的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;}

2、

我的测试代码：

package sc;import java.awt.Rectangle;import java.awt.Robot;import java.awt.Toolkit;import java.awt.image.BufferedImage;import java.io.File;import javax.imageio.ImageIO;public class TScreenCaptureZ{        public static void main(String[] args) throws Exception    {        Robot robot = new Robot();        BufferedImage fullScreenImage = robot.createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()));                File fileSave = new File("d:", "temp_z.jpg");        ImageIO.write(fullScreenImage, "JPEG", fileSave);    }}

3、

网页中使用：

3.1、类 TScreenCaptureZ ：

1 package screenCapture; 2  3  4 import java.awt.Rectangle; 5 import java.awt.Robot; 6 import java.awt.Toolkit; 7 import java.awt.image.BufferedImage; 8 import java.io.File; 9 import java.text.SimpleDateFormat;10 import java.util.Date;11 12 import javax.imageio.ImageIO;13 14 public class TScreenCaptureZ15 {16     17     public static void main(String[] args) throws Exception18     {19         TScreenCaptureZ.Capture_FullScreen("d:/");20     }21     22     public static String Capture_FullScreen(String _strPath) throws Exception23     {24         // 返回的是 截屏的图形的文件名25         26         String strDir = _strPath+"CaptureJPGs/";27         DeleteFilesInDir(strDir);28         29         String strTime = TimeZ();30         //String strJPG = "d:/"+strTime+".jpg";31         //File fileSave = new File("d:", strJPG);32         String strJpgSave = strDir+strTime+".jpg";33         String strJpgRtn = strTime+".jpg";34         35     // ***36         Robot robot = new Robot();37         BufferedImage fullScreenImage = robot.createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()));38         39         File fileSave = new File(strJpgSave);40         ImageIO.write(fullScreenImage, "JPEG", fileSave);41         //*/42         return strJpgRtn;43     }44     45     public static void DeleteFilesInDir(String _strDir)46     {47         File fileDir = new File(_strDir);48         if (fileDir.exists() && fileDir.isDirectory())49         {50             File[] files = fileDir.listFiles();  51             for (int i = 0; i < files.length; i++)52             {53                 File fileDelete = files[i];54                 if (fileDelete.exists() && fileDelete.isFile())55                 {56                     if (! fileDelete.delete())57                         System.out.println(fileDelete.getAbsolutePath()+" 删除失败 .");58                 }59                 else60                 {61                     System.out.println(fileDelete.getAbsolutePath()+" 不存在 或 不是文件 .");62                 }63             }64         }65     }66     67     public static String TimeZ()68     {69         Date nowTime=new Date();70         //System.out.println(nowTime);71         SimpleDateFormat time=new SimpleDateFormat("yyyyMMdd_hhmmss_SSS");// 年月日_时分秒_毫秒72         String str = time.format(nowTime);73         //System.out.println(str);74         75         return str;76     }77 78 }

3.2、

JSP 内容：

1 <%@ page language="java" import="java.util.*, screenCapture.*" pageEncoding="utf-8"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 5 %> 6  7  8  9   10     11     12     My JSP 'index.jsp' starting page13     
     14     
     15     
         16     
     17     
     18     
     21   22   23   24     <%25     String strPath = request.getServletContext().getRealPath("/");26     String strFileName = TScreenCaptureZ.Capture_FullScreen(strPath);27     %>28     29     
     30     31   32