Java中的网络编程：客户端和服务端实例

原创亦凉 2024-10-05 20:03 73阅读 0赞

在Java中，网络编程主要涉及到Socket API。这里我们将提供一个简单的客户端和服务端示例。

1. 客户端（ServerRequest.java）：

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

public class ServerRequest {
    public static void main(String[] args) {
        try (Socket socket = new Socket("localhost", 1234); 
             PrintWriter writer = new PrintWriter(socket.getOutputStream(), true)) {

String message = "Hello from Client!";
            writer.println(message);
            
            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream())));
            String response = reader.readLine();
            System.out.println("Server replied: " + response);

} catch (IOException e) {
            e.printStackTrace();
        }
    }
}
```

2. 服务端（ServerResponse.java）：

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

public class ServerResponse {
    public static void main(String[] args) throws IOException {
        try (ServerSocket serverSocket = new ServerSocket(1234); 
             Socket clientSocket = serverSocket.accept(); 
             BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()))); 
             PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true)) {

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

// Send a response
            String responseToClient = "Hello from Server! Your message: " + messageFromClient;
            out.println(responseToClient);
            
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
```

以上示例中，客户端发送一条消息到服务端，然后服务端返回一条响应。