Amazon Advertising API:无法定位SignedRequestHelper类

Question

我已经从亚马逊scratchpad获得了代码，并获得了所需的包。SignedRequestHelper类不在程序包中，我无法运行该程序。我正在尝试使用亚马逊的asin号码来获取商品的价格。

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 + "\"");
    }
}

我如何才能获得signedrequestshelper方法，或者我如何才能更改代码？

Answer 1

SignedRequestHelper是来自亚马逊网络服务的一个代码示例中的一个类，如下所示：

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

您可以将代码复制/粘贴到项目中，以使其运行和工作。