Java 示例代码，它使用 Socket 编程实现客户端和服务器之间的通信

本文链接：https://blog.youkuaiyun.com/m0_74288808/article/details/130472723

该文章提供了一个简单的JavaSocket编程示例，包括服务器端和客户端的代码实现。服务器端监听8080端口，接收并回应来自客户端的消息，而客户端连接到服务器发送消息并接收响应。这些代码仅用于演示基本原理，实际应用需考虑异常处理和安全性。

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服务器端代码

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

public class Server {
    private static final int PORT = 8080;

    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(PORT);
        System.out.println("Listening on port " + PORT);

        Socket clientSocket = serverSocket.accept();
        System.out.println("Accepted new connection from " + clientSocket.getInetAddress());

        BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
        PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);

        String inputLine;
        while ((inputLine = in.readLine()) != null) {
            System.out.println("Received message: " + inputLine);
            out.println("Hello from server");
            System.out.println("Sent response to client");
        }

        in.close();
        out.close();
        clientSocket.close();
        serverSocket.close();
    }
}

客户端代码

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

public class Client {
    private static final String SERVER_ADDRESS = "localhost";
    private static final int PORT = 8080;

    public static void main(String[] args) throws IOException {
        Socket socket = new Socket(SERVER_ADDRESS, PORT);
        System.out.println("Connected to server");

        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

        String message = "Hello from client";
        out.println(message);
        System.out.println("Sent message to server");

        String response = in.readLine();
        System.out.println("Received response from server: " + response);

        in.close();
        out.close();
        socket.close();
    }
}

请注意，以上示例代码仅用于演示 Socket 编程的基本原理，实际生产环境中应该考虑更多的异常处理和安全问题。