我一直在使用 Amazon 的产品广告 API，但我无法获得通过并给我数据的请求。我一直在解决这个问题:http://docs.amazonwebservices.com/AWSECommerceService/2011-08-01/GSG/还有这个:Amazon Product Advertising API signed request with Java

这是我的代码..我使用这个生成了 SOAP 绑定(bind):http://docs.amazonwebservices.com/AWSECommerceService/2011-08-01/GSG/YourDevelopmentEnvironment.html#Java

在类路径上，我只有:commons-codec.1.5.jar

import com.ECS.client.jax.AWSECommerceService;
import com.ECS.client.jax.AWSECommerceServicePortType;
import com.ECS.client.jax.Item;
import com.ECS.client.jax.ItemLookup;
import com.ECS.client.jax.ItemLookupRequest;
import com.ECS.client.jax.ItemLookupResponse;
import com.ECS.client.jax.ItemSearchResponse;
import com.ECS.client.jax.Items;

public class Client {

    public static void main(String[] args) {

        String secretKey = <my-secret-key>;
        String awsKey = <my-aws-key>;

        System.out.println("API Test started");

        AWSECommerceService service = new AWSECommerceService();
        service.setHandlerResolver(new AwsHandlerResolver(
                secretKey)); // important
        AWSECommerceServicePortType port = service.getAWSECommerceServicePort();

        // Get the operation object:
        com.ECS.client.jax.ItemSearchRequest itemRequest = new com.ECS.client.jax.ItemSearchRequest();

        // Fill in the request object:
        itemRequest.setSearchIndex("Books");
        itemRequest.setKeywords("Star Wars");
        // itemRequest.setVersion("2011-08-01");
        com.ECS.client.jax.ItemSearch ItemElement = new com.ECS.client.jax.ItemSearch();
        ItemElement.setAWSAccessKeyId(awsKey);
        ItemElement.getRequest().add(itemRequest);

        // Call the Web service operation and store the response
        // in the response object:
        com.ECS.client.jax.ItemSearchResponse response = port
                .itemSearch(ItemElement);

        String r = response.toString();
        System.out.println("response: " + r);

        for (Items itemList : response.getItems()) {
            System.out.println(itemList);
            for (Item item : itemList.getItem()) {
                System.out.println(item);
            }
        }

        System.out.println("API Test stopped");

    }
}

这是我得到的结果..我希望看到亚马逊上的一些星球大战书籍被转储到我的控制台 :-/:

API Test started
response: com.ECS.client.jax.ItemSearchResponse@7a6769ea
com.ECS.client.jax.Items@1b5ac06e
API Test stopped

我做错了什么(请注意，第二个 for 循环中没有“项目”被打印出来，因为它是空的)？如何解决此问题或获取相关错误信息？

最佳答案

我不使用 SOAP API，但您的 Bounty 要求并未说明它必须仅使用 SOAP，您希望调用 Amazon 并获得结果。因此，我将使用 REST API 发布这个工作示例，它至少会满足您规定的要求:

I would like some working example code that hits the amazon server and returns results

您需要下载以下内容以满足签名要求:

http://associates-amazon.s3.amazonaws.com/signed-requests/samples/amazon-product-advt-api-sample-java-query.zip

解压缩并获取 com.amazon.advertising.api.sample.SignedRequestsHelper.java 文件并将其直接放入您的项目中。此代码用于签署请求。

您还需要从以下位置下载 Apache Commons Codec 1.3 并将其添加到您的类路径中，即将其添加到您的项目库中。请注意，这是唯一可以与上述类 (SignedRequestsHelper) 一起使用的 Codec 版本

http://archive.apache.org/dist/commons/codec/binaries/commons-codec-1.3.zip

现在您可以复制并粘贴以下内容，确保将 your.pkg.here 替换为正确的包名称并替换 SECRET 和 KEY属性:

package your.pkg.here;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

public class Main {

    private static final String SECRET_KEY = "<YOUR_SECRET_KEY>";
    private static final String AWS_KEY = "<YOUR_KEY>";

    public static void main(String[] args) {
        SignedRequestsHelper helper = SignedRequestsHelper.getInstance("ecs.amazonaws.com", AWS_KEY, SECRET_KEY);

        Map<String, String> params = new HashMap<String, String>();
        params.put("Service", "AWSECommerceService");
        params.put("Version", "2009-03-31");
        params.put("Operation", "ItemLookup");
        params.put("ItemId", "1451648537");
        params.put("ResponseGroup", "Large");

        String url = helper.sign(params);
        try {
            Document response = getResponse(url);
            printResponse(response);
        } catch (Exception ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    private static Document getResponse(String url) throws ParserConfigurationException, IOException, SAXException {
        DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
        Document doc = builder.parse(url);
        return doc;
    }

    private static void printResponse(Document doc) throws TransformerException, FileNotFoundException {
        Transformer trans = TransformerFactory.newInstance().newTransformer();
        Properties props = new Properties();
        props.put(OutputKeys.INDENT, "yes");
        trans.setOutputProperties(props);
        StreamResult res = new StreamResult(new StringWriter());
        DOMSource src = new DOMSource(doc);
        trans.transform(src, res);
        String toString = res.getWriter().toString();
        System.out.println(toString);
    }
}

如您所见，这比 SOAP API 的设置和使用要简单得多。如果您对使用 SOAP API 没有特定要求，那么我强烈建议您改用 REST API。

使用 REST API 的缺点之一是结果不会为您解码为对象。这可以通过基于 wsdl 创建所需的类来解决。

关于java - 通过 Java/SOAP 的亚马逊产品广告 API，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8336427/