8

我一直在玩亚马逊的产品广告 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/和这个：Amazon Product Advertising API signed request with Java

这是我的代码。我使用以下代码生成了 SOAP 绑定：http: //docs.amazonwebservices.com/AWSECommerceService/2011-08-01/GSG/YourDevelopmentEnvironment.html#Java

在 Classpath 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");

    }
}

这是我回来的内容。我希望看到亚马逊上的一些《星球大战》书籍被扔到我的控制台上:-/:

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

我在做什么错（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？

4

4 回答 4

10

我不使用 SOAP API，但您的 Bounty 要求并没有说明它必须使用 SOAP，只是您想调用 Amazon 并获得结果。因此，我将使用 REST API 发布这个工作示例，它至少可以满足您的要求：

我想要一些可以访问亚马逊服务器并返回结果的工作示例代码

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

解压缩并抓取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。

您还需要从以下下载 Apache Commons Codec 1.3 并将其添加到您的类路径中，即将它添加到您的项目库中。请注意，这是唯一适用于上述类 ( SignedRequestsHelper)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，确保替换your.pkg.here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 更易于设置和使用。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组到对象中。这可以通过基于 wsdl 创建所需的类来解决。

于 2011-12-03T21:09:45.083 回答
4

这最终起作用了（我必须将我的 associateTag 添加到请求中）：

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.getResponseGroup().add("Large");
//      itemRequest.getResponseGroup().add("Images");
        // itemRequest.setVersion("2011-08-01");
        com.ECS.client.jax.ItemSearch ItemElement = new com.ECS.client.jax.ItemSearch();
        ItemElement.setAWSAccessKeyId(awsKey);
        ItemElement.setAssociateTag("th0426-20");
        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 itemObj : itemList.getItem()) {

                System.out.println(itemObj.getItemAttributes().getTitle()); // Title
                System.out.println(itemObj.getDetailPageURL()); // Amazon URL
            }
        }

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

    }
}
于 2011-12-05T00:54:10.760 回答
1

看起来响应对象没有覆盖 toString()，所以如果它包含某种错误响应，简单地打印它不会告诉你错误响应是什么。您需要查看 api 以了解响应对象中返回的字段并单独打印这些字段。要么您会收到明显的错误消息，要么您必须返回他们的文档以尝试找出问题所在。

于 2011-12-01T04:36:45.753 回答
1

您需要调用 Item 对象的 get 方法来检索其详细信息，例如：

for (Item item : itemList.getItem()) {
   System.out.println(item.getItemAttributes().getTitle()); //Title of item
   System.out.println(item.getDetailPageURL()); // Amazon URL
   //etc
}

如果有任何错误，您可以通过调用 getErrors() 来获取它们

if (response.getOperationRequest().getErrors() != null) { 
  System.out.println(response.getOperationRequest().getErrors().getError().get(0).getMessage());
}
于 2011-12-01T17:16:51.213 回答