Java网络编程客户端与服务器端交互示例

原创ゞ浴缸里的玫瑰 2024-10-23 06:48 26阅读 0赞

在Java中，进行网络编程客户端与服务器端的交互通常涉及到Socket通信。以下是一个简单的示例：

1. 客户端（ServerThread.java）：
```java
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class ServerThread extends Thread {
    private ServerSocket serverSocket;
    
    public ServerThread(int port) {
        this.serverSocket = new ServerSocket(port);
    }
    
    @Override
    public void run() {
        try {
            Socket clientSocket = serverSocket.accept();
            
            BufferedReader inFromClient = 
                    new BufferedReader(new InputStreamReader(clientSocket.getInputStream()))));
            
            PrintWriter outToClient = 
                    new PrintWriter(new OutputStreamWriter(clientSocket.getOutputStream()))));
            
            String messageFromClient;
            while ((messageFromClient = inFromClient.readLine()) != null)) {
                System.out.println("Received from client: " + messageFromClient);
                
                // 简单处理，这里可以发送回复或执行其他操作
                outToClient.println("Message received, sending response...");
            }
            
        } catch (IOException e) {
            System.err.println(e.getMessage());
            try {
                serverSocket.close();
            } catch (IOException ex) {
                System.out.println(ex.getMessage());
            }
        }
    }
}
```

2. 服务器（Server.java）：
```java
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    private static final int PORT = 1234;

public static void main(String[] args) throws IOException {
        new ServerThread(PORT).start();
        
        // 这里可以添加其他等待客户端连接的操作
        System.out.println("Server is waiting for client connections...");
    }
}
```

以上示例中，服务器端创建一个ServerSocket监听1234端口。当有客户端连接时，服务器会接受这个Socket并进行交互。

注意：在实际开发环境中，请确保服务端的防火墙规则允许该端口的通信。