Java Socket怎样实现远程通信

Java Socket是实现远程通信的一种方式，它基于TCP/IP协议。以下是一个简单的Java Socket远程通信示例，包括客户端和服务器端：

1. 服务器端代码：

import java.io.*; import java.net.*;  public class Server {     public static void main(String[] args) throws IOException {         int port = 12345;         ServerSocket serverSocket = new ServerSocket(port);         System.out.println("Server is listening on port " + port);          Socket socket = serverSocket.accept();         System.out.println("Client connected");          InputStream inputStream = socket.getInputStream();         BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));         String message = reader.readLine();         System.out.println("Received message: " + message);          OutputStream outputStream = socket.getOutputStream();         PrintWriter writer = new PrintWriter(outputStream, true);         writer.println("Hello from server");          socket.close();         serverSocket.close();     } } 

2. 客户端代码：

import java.io.*; import java.net.*;  public class Client {     public static void main(String[] args) throws IOException {         String serverAddress = "localhost";         int port = 12345;          Socket socket = new Socket(serverAddress, port);         System.out.println("Connected to server");          OutputStream outputStream = socket.getOutputStream();         PrintWriter writer = new PrintWriter(outputStream, true);         writer.println("Hello from client");          InputStream inputStream = socket.getInputStream();         BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));         String message = reader.readLine();         System.out.println("Received message: " + message);          socket.close();     } } 

在这个示例中，服务器端监听指定端口（12345），当客户端连接时，服务器接收客户端发送的消息，并向客户端发送回复。客户端连接到服务器后，发送一条消息给服务器，然后接收服务器的回复。

要运行这个示例，首先启动服务器端代码，然后启动客户端代码。注意，如果客户端和服务器端运行在不同的机器上，需要将服务器地址更改为服务器的IP地址。