udpserver.java

来自「JAVA客户机和服务器应用程序设计,有UDP和TCP,课本的源码,我们的课程设计」· Java 代码 · 共 26 行

import java.io.*;
import java.net.*;
class UDPServer {
	public static void main (String argv[]) throws Exception
	{
		DatagramSocket serverSocket = new
		DatagramSocket(8080);
		byte[] receiveData = new byte[1024];
		byte[] sendData = new byte[1024];
	    while(true)
	    {
	    	DatagramPacket receivePacket =
	    	new DatagramPacket(receiveData,receiveData.length);
	    	serverSocket.receive(receivePacket);
	    	String sentence = new String(receivePacket.getData());
	    	InetAddress IPAddress = receivePacket.getAddress();
	    	int port = receivePacket.getPort();
	    	String capitalizedSentence=
	    	sentence.toUpperCase();
	    	sendData = capitalizedSentence.getBytes();
	    	DatagramPacket sendPacket =
	    	new DatagramPacket (sendData,sendData.length,IPAddress,port);
	    serverSocket.send(sendPacket);
	    }
	    }
	    }