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 :
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 TScreenCaptureZ 15 { 16 17 public static void main(String[] args) throws Exception 18 { 19 TScreenCaptureZ.Capture_FullScreen("d:/"); 20 } 21 22 public static String Capture_FullScreen(String _strPath) throws Exception 23 { 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 else 60 { 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 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 8 <html> 9 <head> 10 <base href="<%=basePath%>"> 11 12 <title>My JSP ‘index.jsp‘ starting page</title> 13 <meta http-equiv="pragma" content="no-cache"> 14 <meta http-equiv="cache-control" content="no-cache"> 15 <meta http-equiv="expires" content="0"> 16 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 17 <meta http-equiv="description" content="This is my page"> 18 <!-- 19 <link rel="stylesheet" type="text/css" href="styles.css"> 20 --> 21 </head> 22 23 <body> 24 <% 25 String strPath = request.getServletContext().getRealPath("/"); 26 String strFileName = TScreenCaptureZ.Capture_FullScreen(strPath); 27 %> 28 29 <!-- <img src="20160115_094016_304.jpg"/> --> 30 <img src="CaptureJPGs/<%=strFileName%>"/> 31 </body> 32 </html>
C
时间: 2024-10-01 04:52:08