java--UDP屏幕广播代码

1.发送端的代码

这里广播的地址只写了一个

 package com.udp.broadcast;

 import java.awt.Robot;
 import java.awt.image.BufferedImage;
 import java.io.ByteArrayOutputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.net.DatagramPacket;
 import java.net.DatagramSocket;
 import java.net.InetAddress;
 import java.util.zip.GZIPInputStream;

 import javax.imageio.ImageIO;

 import java.awt.AWTException;
 import java.awt.Rectangle;

 public class ScreenBroadcastDemo {

     public static void main(String[] args) throws Exception {
         DatagramSocket sendSocket = new DatagramSocket(8888);
         Rectangle screenRect = null;
         BufferedImage bufImage = null;
         ByteArrayOutputStream baos = null;
         int i = 0;
         while(true){
             screenRect = new Rectangle(0, 0, 300, 400);
             bufImage = new Robot().createScreenCapture(screenRect);
             baos = new ByteArrayOutputStream();
             ImageIO.write(bufImage, "jpg", baos);
             byte[] byteData = baos.toByteArray();
             DatagramPacket dataPack = new DatagramPacket(byteData, byteData.length);
             InetAddress iaddr = InetAddress.getByName("localhost");
             dataPack.setAddress(iaddr);
             dataPack.setPort(8889);
             sendSocket.send(dataPack);
             i++;
             System.out.println("广播次数" + i);
         }

     }

 }

2. 接收端的代码

2.1 startClient

 package com.udp.receiver;

 public class SartClient {

     public static void main(String[] args) {
         ClientUI clientUI = new ClientUI();
         new ClientReceiverThread(clientUI).start();
     }

 }

2.2ClientUI

 package com.udp.receiver;

 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;

 import javax.swing.ImageIcon;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JTextArea;

 import com.sun.javafx.sg.prism.web.NGWebView;
 import com.sun.org.apache.bcel.internal.generic.IndexedInstruction;

 public class ClientUI extends JFrame {
     private JLabel label;
     private ImageIcon imageIcon;
     public ClientUI(){
         InitUI();

     }
     /*
      *窗口初始化
      */
     public void InitUI(){
         this.setLayout(null);
         this.setVisible(true);
         this.setBounds(0, 0, 500, 600);
         label = new JLabel();
         label.setBounds(0, 0, 300, 400);
         this.add(label);

         //窗口关闭时，程序退出。两种方法都可以
         this.setDefaultCloseOperation(EXIT_ON_CLOSE);
         this.addWindowListener(new WindowAdapter() {
             public void windowClosing(WindowEvent e ) {
                 System.exit(-1);
             }
         });
     }
     public void refreshUI(ImageIcon icon){
         label.setIcon(icon);
         this.add(label);
     }

 }

2.3ClientReceiverThread

 package com.udp.receiver;

 import java.awt.image.BufferedImage;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.net.DatagramPacket;
 import java.net.DatagramSocket;
 import java.net.SocketException;

 import javax.imageio.ImageIO;
 import javax.print.attribute.standard.PrinterMessageFromOperator;
 import javax.swing.ImageIcon;

 public class ClientReceiverThread extends Thread {
     private ClientUI ui;
     public ClientReceiverThread(ClientUI ui){
         this.ui = ui;
     }
     public void run(){
         byte[] buf = new byte[1024 * 60];
         DatagramSocket recvSocket = null;
         byte[] byteRecvData = null;
         ByteArrayInputStream bais = null;
         BufferedImage bufImageRecv = null;
         ImageIcon ImageIcon = null;
         DatagramPacket dataPack = new DatagramPacket(buf, buf.length);
         try {
             recvSocket = new DatagramSocket(8889);
             while(true){
                 recvSocket.receive(dataPack);
                 byteRecvData = dataPack.getData();
                 bais = new ByteArrayInputStream(byteRecvData);
                 bufImageRecv = ImageIO.read(bais);
                 ImageIcon = new ImageIcon(bufImageRecv, "Screen");
                 ui.refreshUI(ImageIcon);
                 Thread.sleep(10);
             }
         } catch (Exception e) {
             e.printStackTrace();
         }            

     }

 }