亚马逊广告 API：找不到 SignedRequestHelper 类

Posted 2023-04-14

【中文标题】亚马逊广告 API：找不到 SignedRequestHelper 类

【英文标题】：Amazon Advertising API: Cannot locate SignedRequestHelper class

【发布时间】：2017-10-15 20:06:16

【问题描述】：

我从亚马逊暂存器获得了代码并获得了所需的包。 SignedRequestHelper 类不在包中，我无法运行该程序。我正在尝试使用 amazon asin 编号获取商品的价格。

package com.amazon.advertising.api.sample;

import java.util.HashMap;
import java.util.Map;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Node;

/*
 * This class shows how to make a simple authenticated call to the
 * Amazon Product Advertising API.
 *
 * See the README.html that came with this sample for instructions on
 * configuring and running the sample.
 */
public class lookup 

    /*
     * Your AWS Access Key ID, as taken from the AWS Your Account page.
     */
    private static final String AWS_ACCESS_KEY_ID = "XXXXXX";

    /*
     * Your AWS Secret Key corresponding to the above ID, as taken from the AWS
     * Your Account page.
     */
    private static final String AWS_SECRET_KEY = "XXXXXXX";

    /*
     * Use the end-point according to the region you are interested in.
     */
    private static final String ENDPOINT = "webservices.amazon.com";


    public static void main(String[] args) 

        /*
         * Set up the signed requests helper.
         */
        SignedRequestsHelper helper;

        try 
         catch (Exception e) 
            e.printStackTrace();
            return;
        

        String requestUrl = null;

        Map<String, String> params = new HashMap<String, String>();

        params.put("Service", "AWSECommerceService");
        params.put("Operation", "ItemLookup");
        params.put("AWSAccessKeyId", "XXXXXX");
        params.put("AssociateTag", "XXXXX");
        params.put("ItemId", "B01H57GXUQ");
        params.put("IdType", "ASIN");
        params.put("ResponseGroup", "Images,ItemAttributes,Offers");

        requestUrl = helper.sign(params);

        System.out.println("Signed URL: \"" + requestUrl + "\"");
    

我将如何获得 signedrequestshelper 方法或如何更改代码？

【参考方案1】：

SignedRequestHelper 是 AWS 的代码示例之一中可用的类：

http://docs.aws.amazon.com/AWSECommerceService/latest/DG/AuthJavaSampleSig2.html

您可以复制/粘贴项目中的代码以使其运行和工作。

【讨论】：

我也遇到了这三个错误，想知道您是否可以提供帮助。谢谢错误：未报告的异常 UnsupportedEncodingException;必须被捕获或声明被抛出 byte[] secretyKeyBytes = awsSecretKey.getBytes(UTF8_CHARSET);错误：未报告的异常 NoSuchAlgorithmException；必须被捕获或声明被抛出 mac = Mac.getInstance(HMAC_SHA256_ALGORITHM);错误：未报告的异常 InvalidKeyException；必须被捕获或声明被抛出 mac.init(secretKeySpec);