java免费发短信

import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class SMSSender {
    private static final String API_URL = "https://api.smsservice.com/send";
    private static final String API_KEY = "your_api_key_here";

    public static void main(String[] args) {
        try {
            URL url = new URL(API_URL);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type", "application/json");
            conn.setDoOutput(true);

            String jsonInputString = "{\"mobile\":\"1234567890\",\"message\":\"Hello, World!\",\"api_key\":\"" + API_KEY + "\"}";

            try (OutputStream os = conn.getOutputStream()) {
                byte[] input = jsonInputString.getBytes("utf-8");
                os.write(input, 0, input.length);
            }

            int responseCode = conn.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                System.out.println("SMS sent successfully!");
            } else {
                System.out.println("Failed to send SMS. Response Code: " + responseCode);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}