Java:发送POST curl命令以延迟发送消息

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

public class DelayedPostRequest {
    public static void main(String[] args) {
        try {
            // 设置目标URL
            URL url = new URL("https://example.com/api/message");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            // 设置请求方法为POST
            connection.setRequestMethod("POST");

            // 设置请求头
            connection.setRequestProperty("Content-Type", "application/json");
            connection.setDoOutput(true);

            // 延迟5秒发送请求
            Thread.sleep(5000);

            // 发送POST请求的数据
            String jsonInputString = "{\"message\": \"Hello, World!\"}";
            try (OutputStream os = connection.getOutputStream()) {
                byte[] input = jsonInputString.getBytes("utf-8");
                os.write(input, 0, input.length);
            }

            // 获取响应码
            int responseCode = connection.getResponseCode();
            System.out.println("POST Response Code :: " + responseCode);

            // 处理响应...
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}