java+socket

Java中的Socket是一种网络通信协议，它是一种基于TCP/IP协议的网络通信协议。下面是一个简单的Java Socket例子：

// 服务端代码
import java.io.*;
import java.net.*;

public class Server {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(8888);
        System.out.println("服务器已启动，等待客户端连接...");
        Socket socket = serverSocket.accept();
        System.out.println("客户端已连接，客户端地址：" + socket.getInetAddress().getHostAddress());
        BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        String line;
        while ((line = br.readLine()) != null) {
            System.out.println("客户端发送的消息：" + line);
        }
        socket.close();
        serverSocket.close();
    }
}

// 客户端代码
import java.io.*;
import java.net.*;

public class Client {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket("localhost", 8888);
        System.out.println("已连接服务器，服务器地址：" + socket.getInetAddress().getHostAddress());
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter pw = new PrintWriter(new OutputStreamWriter(socket.getOutputStream()), true);
        String line;
        while ((line = br.readLine()) != null) {
            pw.println(line);
        }
        socket.close();
    }
}

这个例子中，服务端通过ServerSocket监听8888端口，等待客户端连接。客户端通过Socket连接到服务端的8888端口。服务端接收到客户端的连接请求后，通过socket.getInputStream()获取输入流，读取客户端发送的消息。客户端通过socket.getOutputStream()获取输出流，向服务端发送消息。