a09114f74257001b1647dc3ac84ad89f

《ajax编程技术与实例》的所有的案例

package com.bam;

import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Random;

import javax.imageio.ImageIO;

/**
 * 将屏幕分割成几个Chunk，然后在每个Chunk中放入数据内存；
 */
public class ScreenCapture implements Runnable {

	static Robot robot = null;

	static Toolkit toolkit = Toolkit.getDefaultToolkit();

	static Thread runner = null;

	static int capturew = 800;

	static int captureh = 600;

	static int chunks = 3;

	static int capturebh = captureh / chunks;

	static int capturebw = capturew / chunks;

	static HashMap Images = new HashMap();

	public ScreenCapture(int width, int height, int chunks) {

		capturew = width;
		captureh = height;
		this.chunks = chunks;

		// 每个Chunk的高度、宽度
		capturebh = captureh / chunks;
		capturebw = capturew / chunks;

		this.start();

	}

	public void start() {
		if (runner == null) {

			for (int y = 0; y < chunks; y++) {
				for (int x = 0; x < chunks; x++) {

					// 在对应的位置放入响应的Chunk
					Images.put(new Integer(chunks * y + x).toString(),
							new Chunk());

				}
			}

			runner = new Thread(this);
			runner.start();
		}
	}

	public static HashMap getImages() {

		return Images;

	}

	public static int getChunks() {

		return chunks;

	}

	public void run() {

		if (robot == null)
			robot = createRobot();

		BufferedImage image = null;
		ByteArrayOutputStream os = null;
		Chunk c = null;

		while (true) {

			try {

				if (AJAX_Desktop.logdebug)
					System.out.println("Captured..");

				for (int y = 0; y < chunks; y++) {
					for (int x = 0; x < chunks; x++) {

						// 对每个Chunk写入图片的数据内存	
						image = robot.createScreenCapture(new Rectangle(x
								* capturebw, y * capturebh, capturebw,
								capturebh));
						os = new ByteArrayOutputStream();
						ImageIO.write(image, "png", os);

						byte[] imageStorage = os.toByteArray();

						c = (Chunk) Images.get(new Integer(chunks * y + x)
								.toString());
						c.setData(os.toByteArray());

					}
				}

			} catch (Exception E) {

				E.printStackTrace();
			}

		}

	}

	// 创建Robot类
	private static Robot createRobot() {

		try {

			return new Robot();

		} catch (Exception e) {
			e.printStackTrace();
		}

		return null;
	}

}