多线程实现UDP协议发送、接收数据

最新推荐文章于 2023-08-16 23:35:08 发布

转载最新推荐文章于 2023-08-16 23:35:08 发布 · 1.2k 阅读

1 ·

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/zengjiao/p/6527612.html

文章标签：

#网络 #java #c/c++

本文介绍了一个简单的基于Java的UDP聊天室程序实现。该程序包括发送线程和接收线程两个部分，通过DatagramSocket进行数据包的发送和接收。发送线程负责读取键盘输入并发送到指定的IP地址和端口，而接收线程则负责接收来自特定端口的数据包，并将接收到的内容打印出来。

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package cn.idcast5;

import java.io.IOException;
import java.net.DatagramSocket;
import java.net.SocketException;

public class ChatRoom {
public static void main(String[] args) throws IOException {
	DatagramSocket dsSend = new DatagramSocket();
	DatagramSocket dsReceive = new DatagramSocket(12345);
	SendThread st = new SendThread(dsSend);
	ReceiveThread rt = new ReceiveThread(dsReceive);
	Thread t1 = new Thread(st);
	Thread t2= new Thread(rt);
	t1.start();
	t2.start();
}
}

package cn.idcast5;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class SendThread implements Runnable {
	private DatagramSocket ds;

	public SendThread(DatagramSocket ds) {
		this.ds = ds;
	}

	public void run() {
		try {           //键盘录入数据
			BufferedReader br = new BufferedReader(new InputStreamReader(
					System.in));
			String line = null;
                                 //如果输入886，程序就结束
			while ((line = br.readLine()) != null) {
				if ("886".equals(line)) {
					break;
				}
				byte[] bys = line.getBytes();
				DatagramPacket dp = new DatagramPacket(bys, bys.length,
						InetAddress.getByName("192.168.1.115"), 12345);
				ds.send(dp);
			}
			ds.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

package cn.idcast5;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class ReceiveThread implements Runnable {
	private DatagramSocket ds;

	public ReceiveThread(DatagramSocket ds) {
		this.ds = ds;
	}
	public void run() {
		try {
			while(true){
			byte[] bys = new byte[1024];
			DatagramPacket dp = new DatagramPacket(bys, bys.length);
			ds.receive(dp);
			String ip = dp.getAddress().getHostAddress();
			String s = new String(dp.getData(), 0, dp.getLength());
			System.out.println(ip + "发送的数据是：" + s);
		} 
			}catch (IOException e) {
			e.printStackTrace();
		}

	}

}

转载于:https://www.cnblogs.com/zengjiao/p/6527612.html