多客户端通信的Java套接字程序

最新推荐文章于 2022-06-12 16:26:11 发布

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最新推荐文章于 2022-06-12 16:26:11 发布

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分类专栏： Web开发

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本文介绍了一种使用Java套接字技术和线程池实现的服务端与客户端实时通信的小程序。服务端监听8888端口，通过固定大小的线程池处理客户端请求。客户端可以与服务端进行双向通信。

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这次设计了一个支持多客户端的通信小程序，实现服务端和客户端的实时通信，主要思想是利用Java套接字技术和线程池。服务端的程序如下：

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * Created by Hui on 2016/6/7.
 */
public class ServerTest {

    private int poolSize = 10;
    private static ExecutorService threadPool = null;
    public void init() {
        System.out.println("Server init...");
        threadPool = Executors.newFixedThreadPool(poolSize);
    }
    public static void main(String[] args) {
        try {
            new ServerTest().init();
            ServerSocket server = new ServerSocket(8888);
            while (true) {
                Socket incoming = server.accept();
                System.out.println("A Client Coming...");
                threadPool.submit(new ReturnMessage(incoming));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static class ReturnMessage implements Runnable {
        private Socket socket;
        public ReturnMessage(Socket socket) {
            this.socket = socket;
        }
        @Override
        public void run() {
            try {
                DataOutputStream output = new DataOutputStream(socket.getOutputStream());
                DataInputStream input = new DataInputStream(socket.getInputStream());

                String clientStr = input.readUTF();
                System.out.println("Client Say: " + clientStr);

                if (!"BYE".equals(clientStr)) {
                    output.writeUTF("Echo:" + clientStr);
                }
                output.writeUTF("Good Bye!!!");
                output.close();
                input.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

服务端实时的监听8888端口，一旦有链接即会建立与客户端的联系。

客户端连接的代码如下：

import java.io.*;
import java.net.Socket;

/**
 * Created by zhaoyonghui on 16/6/7.
 */
public class SocketTest {
    public static final String HOST = "你的服务器IP地址";
    public static final int PORT = 8888;
    public static void main(String[] args) {
        Socket socket = null;
        System.out.println("Client Start...");
        try {
            while (true) {
                socket = new Socket(HOST, PORT);

                DataInputStream inputStream = new DataInputStream(socket.getInputStream());
                DataOutputStream outputStream = new DataOutputStream(socket.getOutputStream());

                InputStreamReader reader = new InputStreamReader(System.in);
                String str = new BufferedReader(reader).readLine();

                outputStream.writeUTF(str);

                String responseStr = inputStream.readUTF();
                System.out.println(responseStr);
                if ("Good Bye!!!".equals(responseStr)) {
                    break;
                }
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}