Java_Win屏幕截图

参考网址：

百度 关键字 “java 截屏”
http://blog.csdn.net/caoyuan10036/article/details/7199505
http://www.open-open.com/lib/view/open1363155962718.html
http://www.jb51.net/article/44614.htm

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 ：

package screenCapture;


import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.imageio.ImageIO;

public class TScreenCaptureZ
{
    
    public static void main(String[] args) throws Exception
    {
        TScreenCaptureZ.Capture_FullScreen("d:/");
    }
    
    public static String Capture_FullScreen(String _strPath) throws Exception
    {
        // 返回的是 截屏的图形的文件名
        
        String strDir = _strPath+"CaptureJPGs/";
        DeleteFilesInDir(strDir);
        
        String strTime = TimeZ();
        //String strJPG = "d:/"+strTime+".jpg";
        //File fileSave = new File("d:", strJPG);
        String strJpgSave = strDir+strTime+".jpg";
        String strJpgRtn = strTime+".jpg";
        
    // ***
        Robot robot = new Robot();
        BufferedImage fullScreenImage = robot.createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()));
        
        File fileSave = new File(strJpgSave);
        ImageIO.write(fullScreenImage, "JPEG", fileSave);
        //*/
        return strJpgRtn;
    }
    
    public static void DeleteFilesInDir(String _strDir)
    {
        File fileDir = new File(_strDir);
        if (fileDir.exists() && fileDir.isDirectory())
        {
            File[] files = fileDir.listFiles();  
            for (int i = 0; i < files.length; i++)
            {
                File fileDelete = files[i];
                if (fileDelete.exists() && fileDelete.isFile())
                {
                    if (! fileDelete.delete())
                        System.out.println(fileDelete.getAbsolutePath()+" 删除失败 .");
                }
                else
                {
                    System.out.println(fileDelete.getAbsolutePath()+" 不存在 或 不是文件 .");
                }
            }
        }
    }
    
    public static String TimeZ()
    {
        Date nowTime=new Date();
        //System.out.println(nowTime);
        SimpleDateFormat time=new SimpleDateFormat("yyyyMMdd_hhmmss_SSS");// 年月日_时分秒_毫秒
        String str = time.format(nowTime);
        //System.out.println(str);
        
        return str;
    }

}

3.2、

JSP 内容：

<%@ page language="java" import="java.util.*, screenCapture.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>
  
  <body>
    <%
    String strPath = request.getServletContext().getRealPath("/");
    String strFileName = TScreenCaptureZ.Capture_FullScreen(strPath);
    %>
    
    <!-- <img src="20160115_094016_304.jpg"/> -->
    <img src="CaptureJPGs/<%=strFileName%>"/>
  </body>
</html>

C