java socket 代码

以下是一个简单的 Java Socket 通信示例代码，其中实现了客户端和服务端之间的简单文本通信：

服务端代码：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    public static void main(String[] args) {
        try {
            ServerSocket serverSocket = new ServerSocket(8888); // 创建一个ServerSocket，监听8888端口
            System.out.println("Server is started, waiting for client to connect...");

            Socket socket = serverSocket.accept(); // 等待客户端连接

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

            while (true) {
                String message = in.readLine(); // 读取客户端发送的消息
                System.out.println("Received message from client: " + message);
                out.println("Server received message: " + message); // 发送响应消息给客户端
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

客户端代码：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

public class Client {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("localhost", 8888); // 创建一个Socket，连接到服务端的8888端口

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

            BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
            while (true) {
                String message = reader.readLine(); // 从控制台读取用户输入的消息
                out.println(message); // 发送消息给服务端
                String response = in.readLine(); // 读取服务端的响应消息
                System.out.println("Received response from server: " + response); // 输出响应消息
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

这个简单的示例实现了客户端和服务端之间的文本通信，可以通过修改代码实现更复杂的网络通信需求。