JAVA的远程控制系统（远程监控）实现

在公司，无聊之际，看到网上关于Robot()类的使用，随想自己实现一个简单的监控系统。这个监控系统没有实现远程的控制操作，只是简单的客户端可以看到远程看到服务器的桌面。另外我在机房局域网测试的时候，发现客户端发现服务器的改变需要5－10秒的时间。不知原因为何？
java 代码

/*
  客户端的实现：主要实现的功能是从服务器得到服务器桌面的图片，并进行显示。
*/
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import java.util.Timer;
import java.io.IOException;
import java.net.*;
public class Client extends JFrame
{
 private java.net.Socket cs;
        private MyPanel mypanel;
 public Client()
 {
  mypanel=new MyPanel();
  this.getContentPane().add(mypanel);

  this.clock.start();
  this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
 }
 public static void main(String[] args)
 {
  Client client = new Client();
  client.setSize(800, 800);
  client.setVisible(true);

 }
    private javax.swing.Timer clock=new javax.swing.Timer(1000,new ActionListener() {
  public void actionPerformed(ActionEvent e)
  {
   try
   {
         cs=new java.net.Socket("192.168.0.3", 12000);
    Image image=javax.imageio.ImageIO.read(cs.getInputStream());
    mypanel.setImage(image);
    mypanel.repaint();
    cs.close();
   } catch (UnknownHostException e2)
   {

    e2.printStackTrace();
   } catch (IOException e2)
   {

    e2.printStackTrace();
   }


  }

    });
 public void drawImage()
 {

 }
}
class MyPanel extends JPanel
{
 private Image image;
 public MyPanel(Image image)
 {
    this.image=image;
 }
   public void setImage(Image image)
   {
    this.image=image;
   }
 public MyPanel()
 {
  // TODO 自动生成构造函数存根
 }
 public void paintComponent(Graphics g)
 {
  g.drawImage(image, 0, 0, null);
 }
}
/***********************************************************************
*************************************************************************/
/*
 服务器端的实现：
  主要实现采集服务器的桌面，并多线程实现给客户端的发送
*/
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
public class Server
{
    private final static int PORT = 12000;
    public static void main(String[] args)
    {
 try
 {
     ServerSocket server = new ServerSocket(PORT);
     Socket connection = null;
     while (true)
     {
  try
  {
     new ShotThread(server).start();
  } finally
  {
      try
      {
   if (connection != null)
       connection.close();
      } catch (IOException e)
      {
      }
  }
     }
 } catch (IOException ee)
 {
     System.err.println(ee);
 }
    } // end main
}
/**
 * 多线程的连接：
 *
 */
class ShotThread extends Thread
{
    ServerSocket server;
    public ShotThread(ServerSocket server)
    {
 try
 {
     this.connection = server.accept();
 } catch (IOException e)
 {
     e.printStackTrace();
 }
    }
    public void run()
    {
 System.out.println("得到连接:");
// try
// {
//    // this.sleep(500);
// } catch (InterruptedException e2)
// {
//     //
//     e2.printStackTrace();
// }
 java.awt.image.BufferedImage image = (new ShotImage()).snapShot();
 if (image == null)
     try
     {
  throw new IOException();
     } catch (IOException e1)
     {
  // TODO 自动生成 catch 块
  e1.printStackTrace();
     }
 try
 {

     javax.imageio.ImageIO.write(image, "jpg", connection
      .getOutputStream());
     connection.close();
 } catch (IOException e)
 {
     e.printStackTrace();

 }
    }
    Socket connection = null;
}
/************************************************************************
*************************************************************************/
/*
 图片采集的代码
*/


import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
public class ShotImage
{
 private Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
 private String imageFormat = "jpg";
 private int Num = 0;
 BufferedImage screenshot;
 public synchronized  BufferedImage snapShot()
 {
  try
  {
   screenshot = (new Robot()).createScreenCapture(new Rectangle(0, 0,
   (int) dimension.getWidth(), (int) dimension.getHeight()));
  } catch (Exception ex)
  {
   System.out.println(ex);
  }
  return screenshot;
 }
}