Java网络编程：客户端和服务端的通信问题实例

原创 Myth丶恋晨 2024-11-27 07:54 13阅读 0赞

在Java网络编程中，客户端和服务端的通信通常通过Socket或HTTP协议实现。以下是一个简单的例子，展示客户端和服务端的TCP通信：

1. 客户端（Client.java）：
```java
import java.io.*;
import java.net.*;

public class Client {
    public static void main(String[] args) {
        // 创建Socket
        try (Socket socket = new Socket("localhost", 1234)) {
            System.out.println("Connected to Server");

// 发送数据
            DataOutputStream out = new DataOutputStream(socket.getOutputStream()));
            out.writeUTF("Hello from Client!");

// 接收数据
            DataInputStream in = new DataInputStream(socket.getInputStream()));
            String response = in.readUTF();
            System.out.println("Received from Server: " + response);

} catch (IOException e) {
            System.err.println(e.getMessage());
        }
    }
}
```

2. 服务端（Server.java）：
```java
import java.io.*;
import java.net.*;

public class Server {
    public static void main(String[] args) {
        try (ServerSocket serverSocket = new ServerSocket(1234)) {
            System.out.println("Server listening on port 1234");

// 等待客户端连接
            Socket socket = serverSocket.accept();
            System.out.println("Accepted connection from client: " + socket);

// 接收数据并发送响应
            DataInputStream in = new DataInputStream(socket.getInputStream()));
            String request = in.readUTF();
            System.out.println("Received request from client: " + request);

// 发送响应
            DataOutputStream out = new DataOutputStream(socket.getOutputStream()));
            out.writeUTF("Hello from Server! Response for " + request);
            out.flush();

} catch (IOException e) {
            System.err.println(e.getMessage());
        }
    }
}
```

这个例子展示了客户端和服务端通过TCP协议进行通信的过程。客户端发送请求，服务端接收请求并发送响应。