001socket的基本使用

最新推荐文章于 2025-12-04 18:28:10 发布

原创最新推荐文章于 2025-12-04 18:28:10 发布 · 202 阅读

0 ·

CC 4.0 BY-SA版权

WEB 专栏收录该内容

9 篇文章

订阅专栏

本文介绍了一个使用Java实现的UDP Socket通信示例，包括发送端和接收端的代码实现。通过创建DatagramSocket实例，使用DatagramPacket进行数据包的发送与接收，实现了本地主机间的简单聊天功能。

package sock;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.*;

public class MySock {
    public static void main(String[] args) throws Exception {
//        ipAdd();
//        send001();
//        receive001();
        DatagramSocket socket = new DatagramSocket();
        DatagramSocket socket1 = new DatagramSocket(12332);
        new Thread(new ChatSend(socket)).start();
        new Thread(new ChatReceive(socket1)).start();

    }

    private static void receive001() throws Exception {
        DatagramSocket so = new DatagramSocket(12345);
        byte[] arr = new byte[1234];
        DatagramPacket datagramPacket = new DatagramPacket(arr,arr.length);
        so.receive(datagramPacket);
        InetAddress address = datagramPacket.getAddress();
        int port = datagramPacket.getPort();
        byte[] data = datagramPacket.getData();
        System.out.println(address+new String(data,0,datagramPacket.getLength())+port);
    }

    private static void send001() throws Exception {
        DatagramSocket send = new DatagramSocket();
        byte[] arr = "abcdeg".getBytes();
        DatagramPacket datagramPacket = new DatagramPacket(arr,arr.length, InetAddress.getByName("127.0.0.1"), 12345);
        send.send(datagramPacket);
        send.close();

    }

    private static void ipAdd() throws UnknownHostException {
        InetAddress[] allByName = InetAddress.getAllByName("www.baidu.com");
        for (InetAddress inetAddress : allByName) {
            System.out.println(inetAddress.getHostAddress());
            System.out.println(inetAddress.getHostName());
        }
    }
}

class ChatSend implements Runnable{
    private DatagramSocket datagramSocket;

    public ChatSend(DatagramSocket datagramSocket) {
        this.datagramSocket = datagramSocket;
    }

    @Override
    public void run() {

            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
            String res = null;
            try {
                while ((res = bufferedReader.readLine()) != null) {
                    if ("886".equals(res)) {
                        break;
                    }
                    DatagramPacket datagramPacket = new DatagramPacket(res.getBytes(), res.length(), InetAddress.getByName("127.0.0.1"), 12332);
                    datagramSocket.send(datagramPacket);
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {

                datagramSocket.close();
            }

    }
}

class ChatReceive implements Runnable{
    private DatagramSocket datagramSocket;

    public ChatReceive(DatagramSocket datagramSocket) {

        this.datagramSocket = datagramSocket;
    }


    @Override
    public void run() {
        byte[] arr = new byte[1234];
        DatagramPacket datagramPacket = new DatagramPacket(arr, arr.length);
        try {
            while (true) {

            datagramSocket.receive(datagramPacket);
            InetAddress address = datagramPacket.getAddress();
            byte[] data = datagramPacket.getData();
            int port = datagramPacket.getPort();
            System.out.println(address.getHostAddress()+":"+new String(data,0,datagramPacket.getLength())+":"+port);
            }

        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            datagramSocket
                    .close();

        }

    }
}