亚马逊MWS开发套路演示

　　MWS是商城网络服务的缩写，具体介绍看这里http://docs.developer.amazonservices.com/zh_CN/dev_guide/DG_IfNew.html。MWS就是一组API，提供给开发者调用，实现卖家的数据上传、获取报告、库存、订单等。上面的贴出来的链接里有关于MWS开发者的详细说明，建议先好好通读下“程序员开发指南”，先了解下需要怎么去拼接请求地址和必传参数，否则会走很多弯路。

　　在构造一个请求MWS的url之前，你必须得有一个卖家ID（merchantId），如果你自己就是卖家，那么就拿你的卖家ID去注册一个开发者账号，亚马逊会给你一个开发者ID、一个访问秘钥ID（accessKeyId）和一个访问秘钥（secretAccessKey），我们只需要用到3个信息：merchantId、accessKeyId和secretAccessKey。如果卖家是你的朋友，那么同上，由他去注册开发者账号，把这3个信息给你即可。如果是第三方开发者（他已经自己注册了开发者账号），那么卖家需要拿第三方开发者的账号进行授权，授权他能访问卖家账号，这种情况需要把授权令牌（sellerDevAuthToken）拼接到请求地址中。最后作为开发者，你还得知道卖家的MWS究竟是在哪个国家开的，是在美国，欧洲，还是中国？每个地方对应不同的链接地址。

　　亚马逊 MWS 文档 » 程序开发员指南 » 亚马逊 MWS Scratchpad（测试工具），点开之后有不同国家MWS对应测试链接，可以要求把对应的参数输进去，看下API返回信息对不对。假设我的店开在中国区，那么就到https://developer.amazonservices.com.cn/这里去点开“导航 -> 亚马逊 MWS Scratchpad（测试工具）”。如果是国外的MWS会慢一些，毕竟传输路径比较长嘛。假如我现在是在北美注册的卖家账号，那么点开https://developer.amazonservices.com（等待n秒） -> Amazon MWS Scratchpad -> SellerId填merchantId、AWSAccessKeyId填accessKeyId、Secret Key填secretAccessKey -> 最后选对应API操作后，点击提交即可。

　　如果你想下载客户端代码，直接点开“API与文档 -> 报告（随便点开一个接口即可）-> Java客户端（选择你想要的语言）-> download”。下好了代码直接就拿来主义好了，改改上面的请求字段就可以跑起来了，看一下获取报告条数的API：

/*******************************************************************************
 *  Copyright 2009 Amazon Services.
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *
 *  You may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at: http://aws.amazon.com/apache2.0
 *  This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 *  CONDITIONS OF ANY KIND, either express or implied. See the License for the
 *  specific language governing permissions and limitations under the License.
 * *****************************************************************************
 *
 *  Marketplace Web Service Java Library
 *  API Version: 2009-01-01
 *  Generated: Wed Feb 18 13:28:48 PST 2009
 *
 */

package com.amazonaws.mws.samples;

import java.util.List;
import java.util.ArrayList;
import com.amazonaws.mws.*;
import com.amazonaws.mws.model.*;
import com.amazonaws.mws.mock.MarketplaceWebServiceMock;

/**
 *
 * Get Report Count  Samples
 *
 *
 */
public class GetReportCountSample {

    /**
     * Just add a few required parameters, and try the service
     * Get Report Count functionality
     *
     * @param args unused
     */
    public static void main(String... args) {

        /************************************************************************
         * Access Key ID and Secret Access Key ID, obtained from:
         * http://aws.amazon.com
         ***********************************************************************/
        final String accessKeyId = "WWWWWWLLLLLLFFFFFFFF";
        final String secretAccessKey = "WWWWWWLLLLLLFFFFFFFFWWWWWWLLLLLLFFFFFFFF";

        final String appName = "AmazonJavascriptScratchpad";
        final String appVersion = "1.0";

        MarketplaceWebServiceConfig config = new MarketplaceWebServiceConfig();

        /************************************************************************
         * Uncomment to set the appropriate MWS endpoint.
         ************************************************************************/
        // US
         config.setServiceURL("https://mws.amazonservices.com/");
        // UK
        // config.setServiceURL("https://mws.amazonservices.co.uk/");
        // Germany
        // config.setServiceURL("https://mws.amazonservices.de/");
        // France
        // config.setServiceURL("https://mws.amazonservices.fr/");
        // Italy
        // config.setServiceURL("https://mws.amazonservices.it/");
        // Japan
        // config.setServiceURL("https://mws.amazonservices.jp/");
        // China
        // config.setServiceURL("https://mws.amazonservices.com.cn/");
        // Canada
        // config.setServiceURL("https://mws.amazonservices.ca/");
        // India
        // config.setServiceURL("https://mws.amazonservices.in/");

        /************************************************************************
         * The argument (35) set below is the number of threads client should
         * spawn for processing.
         ***********************************************************************/

        config.setMaxAsyncThreads(35);

        /************************************************************************
         * You can also try advanced configuration options. Available options are:
         *
         *  - Signature Version
         *  - Proxy Host and Proxy Port
         *  - User Agent String to be sent to Marketplace Web Service
         *
         ***********************************************************************/

        /************************************************************************
         * Instantiate Http Client Implementation of Marketplace Web Service
         ***********************************************************************/

        MarketplaceWebService service = new MarketplaceWebServiceClient(
                accessKeyId, secretAccessKey, appName, appVersion, config);

        /************************************************************************
         * Uncomment to try out Mock Service that simulates Marketplace Web Service
         * responses without calling Marketplace Web Service  service.
         *
         * Responses are loaded from local XML files. You can tweak XML files to
         * experiment with various outputs during development
         *
         * XML files available under com/amazonaws/mws/mock tree
         *
         ***********************************************************************/
        // MarketplaceWebService service = new MarketplaceWebServiceMock();

        /************************************************************************
         * Setup request parameters and uncomment invoke to try out
         * sample for Get Report Count
         ***********************************************************************/

        /************************************************************************
         * Marketplace and Merchant IDs are required parameters for all
         * Marketplace Web Service calls.
         ***********************************************************************/
        final String merchantId = "WWWWLLLLLFFFFF";
        final String sellerDevAuthToken = "<Merchant Developer MWS Auth Token>";

        GetReportCountRequest request = new GetReportCountRequest();
        request.setMerchant( merchantId );
        //request.setMWSAuthToken(sellerDevAuthToken);

        // @TODO: set request parameters here

         invokeGetReportCount(service, request);

    }

    /**
     * Get Report Count  request sample
     * returns a count of reports matching your criteria;
     * by default, the number of reports generated in the last 90 days,
     * regardless of acknowledgement status
     *
     * @param service instance of MarketplaceWebService service
     * @param request Action to invoke
     */
    public static void invokeGetReportCount(MarketplaceWebService service, GetReportCountRequest request) {
        try {

            GetReportCountResponse response = service.getReportCount(request);

            System.out.println ("GetReportCount Action Response");
            System.out.println ("=============================================================================");
            System.out.println ();

            System.out.print("    GetReportCountResponse");
            System.out.println();
            if (response.isSetGetReportCountResult()) {
                System.out.print("        GetReportCountResult");
                System.out.println();
                GetReportCountResult  getReportCountResult = response.getGetReportCountResult();
                if (getReportCountResult.isSetCount()) {
                    System.out.print("            Count");
                    System.out.println();
                    System.out.print("                " + getReportCountResult.getCount());
                    System.out.println();
                }
            }
            if (response.isSetResponseMetadata()) {
                System.out.print("        ResponseMetadata");
                System.out.println();
                ResponseMetadata  responseMetadata = response.getResponseMetadata();
                if (responseMetadata.isSetRequestId()) {
                    System.out.print("            RequestId");
                    System.out.println();
                    System.out.print("                " + responseMetadata.getRequestId());
                    System.out.println();
                }
            }
            System.out.println();
            System.out.println(response.getResponseHeaderMetadata());
            System.out.println();

        } catch (MarketplaceWebServiceException ex) {

            System.out.println("Caught Exception: " + ex.getMessage());
            System.out.println("Response Status Code: " + ex.getStatusCode());
            System.out.println("Error Code: " + ex.getErrorCode());
            System.out.println("Error Type: " + ex.getErrorType());
            System.out.println("Request ID: " + ex.getRequestId());
            System.out.print("XML: " + ex.getXML());
            System.out.println("ResponseHeaderMetadata: " + ex.getResponseHeaderMetadata());
        }
    }

}

　　跑完控制台输出成功日志：

GetReportCount Action Response
=============================================================================

    GetReportCountResponse
        GetReportCountResult
            Count
                1593
        ResponseMetadata
            RequestId
                ae847abb-6335-4ec3-904c-b3fdbd999979

requestId : ae847abb-6335-4ec3-904c-b3fdbd999979
responseContext : bu7253H8xUoTt/yMP7gsP5osYa5dLIQ0Av+i7ENQwKBd14/ZhdEIw6yQW+2kan0HwujlUmeuaR8=
timestamp : 2018-07-16T07:57:35.453Z