海外先物相場

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class ToolkkExample {
    public static void main(String[] args) throws Exception {
        String payload = "{\n  \"symbol\": \"期货品种代码，详见代码表\"\n}";

        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://openapi.toolkk.com/v1/aliyunmarket-cmapi00066016-finance-external-futures-price"))
            .method("POST", HttpRequest.BodyPublishers.ofString(payload))
            .header("Content-Type", "application/json")
            .header("X-API-Key", "YOUR_API_KEY")
            .build();

        HttpResponse<String> response = HttpClient.newHttpClient()
            .send(request, HttpResponse.BodyHandlers.ofString());

        System.out.println(response.body());
    }
}