实用技巧：如何使用Java调用七牛云云市场接口实现订购服务

<dependencies>
    <dependency>
        <groupId>com.qiniu</groupId>
        <artifactId>qiniu-java-sdk</artifactId>
        <version>7.4.0</version>
    </dependency>
</dependencies>

import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.util.Auth;
import com.qiniu.util.StringMap;

public class MarketplaceClient {
    private static final String ACCESS_KEY = ""; // 七牛云Access Key
    private static final String SECRET_KEY = ""; // 七牛云Secret Key
    private static final String HOST = "https://api.qiniu.com"; // 七牛云API域名
    private static final String PATH = "/v1/marketplace/orders"; // API路径
    private static final String METHOD = "POST"; // 请求方法

    private Auth auth;

    public MarketplaceClient() {
        auth = Auth.create(ACCESS_KEY, SECRET_KEY);
    }
}

public void placeOrder(String productId) throws QiniuException {
    String url = HOST + PATH;

    StringMap body = new StringMap();
    body.put("product_id", productId);

    long timestamp = System.currentTimeMillis() / 1000;
    String nonce = String.valueOf(timestamp);
    String signature = auth.signRequestV2(url, METHOD, nonce, body, null);

    StringMap headers = new StringMap();
    headers.put("Authorization", "Qiniu " + signature);
    headers.put("Content-Type", "application/json");

    Response response = auth.getClient().post(url, body.toString(), headers, MediaType.APPLICATION_JSON_VALUE);
    System.out.println(response.bodyString());
}

public static void main(String[] args) {
    MarketplaceClient client = new MarketplaceClient();
    try {
        client.placeOrder("your_product_id"); // 替换为你要订购的产品ID
    } catch (QiniuException e) {
        e.printStackTrace();
    }
}