如何通过Java进行网络编程？-蒲公英云

如何通过Java进行网络编程？

原创 Bertha 。 2024-09-18 22:00 193阅读 0赞

在Java中，我们可以通过Java的Socket和ServerSocket类来进行网络编程。以下是一个简单的示例：

客户端代码（发送数据）：

import java.io.*;
import java.net.*;
public class Client {
    public static void main(String[] args) {
        try {
            // 创建连接
            Socket socket = new Socket("localhost", 1234); 
            // 获取输出流
            OutputStream outputStream = socket.getOutputStream(); 
            // 发送数据
            String message = "Hello, Server!";
            byte[] bytes = message.getBytes("utf-8"); 
            outputStream.write(bytes);
            // 关闭连接
            socket.close();
            System.out.println("Data sent successfully!");
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("Error occurred while sending data.");
        }
    }
}

服务器端代码（接收数据）：

import java.io.*;
import java.net.*;
public class Server {
    public static void main(String[] args) {
        try {
            // 创建服务器端的Socket
            ServerSocket serverSocket = new ServerSocket(1234); 
            System.out.println("Server is listening for incoming connections..."); 
            // 等待客户端连接
            Socket clientSocket = serverSocket.accept(); 
            System.out.println("Client connected successfully!"); 
            // 获取输入流
            InputStream inputStream = clientSocket.getInputStream(); 
            // 创建输出流
            OutputStream outputStream = new PrintWriter(new BufferedOutputStream(inputStream), "utf-8")); 
            byte[] bytes = new byte[1024]; 
            int count;
            while ((count = inputStream.read(bytes))) != -1) { 
                String message = new String(bytes, 0, count)); 
                System.out.println("Server received data: " + message); 
                // 将数据发送回客户端
                outputStream.write(message.getBytes("utf-8")));
            }
            // 关闭连接和流
            clientSocket.close(); 
            inputStream.close(); 
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("Error occurred while listening or accepting connections.");
        }
    }
}