将字符串从Java发送到C(套接字)

import java.net.Socket;

public class Main {
  public static void main(String[] args) {
    try {
      // 创建套接字
      Socket socket = new Socket("localhost", 8080);

      // 创建输出流以写入字符串
      OutputStream os = socket.getOutputStream();
      os.write("Hello, World!".getBytes());

      // 关闭输出流和套接字
      os.close();
      socket.close();

      System.out.println("String sent to C.");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>

int main(int argc, char *argv[]) {
  int sock = 0, valread;
  struct sockaddr_in serv_addr;
  char* message = "Hello, World!";
  char buffer[256];

  // 创建套接字
  sock = socket(AF_INET, SOCK_STREAM, 0);
  memset(&serv_addr, 0, sizeof(serv_addr));
  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
  serv_addr.sin_port = htons(8080);

  // 连接套接字
  connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr));

  // 发送字符串
  send(sock, message, strlen(message), 0);

  // 读取响应
  valread = read(sock, buffer, 256);
  printf("Received message from C: %s
", buffer);

  // 关闭套接字
  close(sock);

  return 0;
}