udpclientdemo.java

来自「互联网多人联机对垒游戏-分服务端、客户端」· Java 代码 · 共 40 行

import java.net.DatagramSocket;
import java.net.DatagramPacket;
import java.net.SocketException;
import java.net.InetAddress;
import java.io.IOException;
class UDPClientDemo{
	public static void main(String[] args){
		int cPort=3000;
		DatagramSocket cUDPSocket=null;
		byte[] inBuffer=new byte[100];
		byte[] outBuffer=new byte[100];
		DatagramPacket inPacket,outPacket;
		String sendMsg="This is the message from the client";
		String receiveMsg;
		//创建客户端的数据报套接字
		try{
			cUDPSocket=new DatagramSocket(cPort);
		}catch(SocketException e){
			System.out.println("创建数据报套接字失败.");
			System.exit(1);
		}
		try{
			//发送数据报给服务器
			outBuffer=sendMsg.getBytes();
			outPacket=new DatagramPacket(outBuffer,outBuffer.length,InetAddress.getByName("168.23.8.50"),7000);
			cUDPSocket.send(outPacket);
			//接收服务器的回应数据报信息
			inPacket=new DatagramPacket(inBuffer,inBuffer.length);
			cUDPSocket.receive(inPacket);
			receiveMsg=new String(inPacket.getData());
			System.out.println(receiveMsg);
		}catch(IOException e){
			System.out.println("发送数据出现错误:"+e);
			cUDPSocket.close();
		}
		//关闭数据报套接字
		cUDPSocket.close();
	}
}