如何编写程序从服务器接收数据，如果数据是用Java接收的，则将数据发送到服务器

import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    public static void main(String[] args) {
        try {
            // 创建服务器套接字，监听端口8080
            ServerSocket serverSocket = new ServerSocket(8080);
            
            // 等待客户端连接
            Socket clientSocket = serverSocket.accept();
            
            // 获取输入流，读取客户端发送的数据
            InputStream inputStream = clientSocket.getInputStream();
            
            // 读取数据
            byte[] buffer = new byte[1024];
            int length = inputStream.read(buffer);
            
            // 打印接收到的数据
            String receivedData = new String(buffer, 0, length);
            System.out.println("Received data: " + receivedData);
            
            // 关闭连接
            inputStream.close();
            clientSocket.close();
            serverSocket.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import java.io.OutputStream;
import java.net.Socket;

public class Client {
    public static void main(String[] args) {
        try {
            // 连接服务器
            Socket socket = new Socket("服务器IP地址", 8080);
            
            // 发送数据
            String data = "Hello, server!";
            OutputStream outputStream = socket.getOutputStream();
            outputStream.write(data.getBytes());
            
            // 关闭连接
            outputStream.close();
            socket.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}