spyclient.java

一个基于JAVA TCP 的远程监视的小程序

package TCPSpy;

  import   com.sun.image.codec.jpeg.*;   
  import   java.io.*;      
  import   java.awt.image.*;   
  import   java.net.*;   
  import   java.awt.*;   
  import   javax.swing.*;   
    
  class   MyFrame   extends   JFrame   {
      
  private   MyPanel   panel   =   null;
  
  public   MyFrame()   {   
  panel   =   new   MyPanel();   
  add(panel);   
  }   
    
  public   void   drawScr(BufferedImage   bi)   {   
  panel.draw(bi);   
  }   
    
  private    class   MyPanel   extends   JPanel   {   
   
  private   BufferedImage   bi   =   null;  
  
  @Override
  protected   void   paintComponent(Graphics   g)   {   
  super.paintComponent(g);   
  g.drawImage(bi,   0,   0,   null);   
  }   
    
  public   void   draw(BufferedImage   bi)   {   
  this.bi   =   bi;   
  this.updateUI();   
  }   
  }   
  }   
    
  public   class   SpyClient   extends   Thread   {   
    
  private   InetAddress   ip   =   null;   
  private   Socket   s   =   null;   
  private   InputStream   is   =   null;   
  private   MyFrame   frame   =   null; 
  
  public   SpyClient(String address, int port)   {   
  try   {   
     ip   =   InetAddress.getByName(address); 
     s   =   new   Socket(ip, port);   
     is   =   s.getInputStream();   
  }   
  catch   (Exception   ex)  {
      ex.printStackTrace();   
      System.err.println("public   Client.");  
  }   
  }   
    
    @Override
  public   void   run() {   
  frame   =   new   MyFrame();   
  frame.setSize(800,600);
  frame.setVisible(true);   
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   
  try {   
  JPEGImageDecoder  decoder ;
  while(true)  {
  decoder   =   JPEGCodec.createJPEGDecoder(is); 
  Dimension d=Toolkit.getDefaultToolkit().getScreenSize();
  BufferedImage resize=new BufferedImage((int) d.getWidth(),(int) d.getHeight(),BufferedImage.TYPE_INT_RGB);
  BufferedImage   bi   =   decoder.decodeAsBufferedImage(); 
  resize.getGraphics().drawImage(bi, 0, 0,(int) d.getWidth(),(int) d.getHeight(), null);
  if   (resize   !=   null) {   
  frame.drawScr(resize);    
  } 
  Thread.sleep(20);
  } 
  }   
  catch   (Exception   ex) {   
  ex.printStackTrace();  
  }   
}
    
  public   static   void   main(String[]   args)   throws   Exception   {   
  new   SpyClient("192.168.3.121",2222).start();   
  }     
  }