代付下单

import com.google.gson.*;

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

public class HttpClientExample {
    public static void main(String[] args) {
        HttpClient client = HttpClient.newHttpClient();

        // Create the request body (example, if needed, otherwise, you can remove this)
        String requestBody = "{\"key\":\"value\"}";  // You can replace with actual data for POST request

        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create("https://example.com/api/v1/trades"))
                .POST(HttpRequest.BodyPublishers.ofString(requestBody))
                .header("Accept", "application/json")
                .header("Content-Type", "application/json")
                .build();

        try {
            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());

            // Check if the HTTP status code is 200 ~ 299
            int statusCode = response.statusCode();

            if (statusCode >= 200 && statusCode <= 299) {
                System.out.println("Success: " + statusCode);
            } else {
                System.out.println("Failed: " + statusCode);
            }

            // Check if a specific key exists in the JSON response, e.g., 'transfer_no'
            String responseBody = response.body();
            System.out.println("Response Body: " + responseBody);

            if (isValidJson(responseBody)) {
                Gson gson = new Gson();
                JsonObject jsonObject = gson.fromJson(responseBody, JsonObject.class);

                String key = "transfer_no";

                if (jsonObject.has(key)) {
                    String value = jsonObject.get(key).getAsString();
                    System.out.println(key + " found: " + value);
                } else {
                    System.out.println(key + " not found");
                }
            } else {
                System.out.println("Response body is not valid JSON.");
            }
        } catch (IOException | InterruptedException e) {
            System.err.println("Error occurred: " + e.getMessage());
        }
    }

    // Check if a string is valid JSON
    private static boolean isValidJson(String json) {
        try {
            JsonElement jsonElement = JsonParser.parseString(json);
            return jsonElement.isJsonObject() || jsonElement.isJsonArray();
        } catch (JsonParseException e) {
            return false;
        }
    }
}