品种代码查询

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  \"pidx\": \"页码，每页最多50\",\n  \"rout\": \"分类rout和keywords两参数中至少输入其中一个,参考(CNST,USST,HKST,GBFSB,GBCFD,GBFT,CNFT,GBDC,GBIDX,C...\",\n  \"keywords\": \"模糊关键字，拼音首字母/代码等(rout和keywords两参数中必须至少输入其中一个)\",\n  \"futmain\": \"是否筛选主力合约(1是0否)，针对期货分类有效\"\n}";

        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://openapi.toolkk.com/v1/aliyunmarket-cmapi029045-query-symbols"))
            .method("GET", 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());
    }
}