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问题

Java例程：通过HTTP posting Trading API Request XML to eBay trading API web service and JAXB framework f

解答

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总述

此Java例程演示了使用HttpURLConnection向for posting Trading API Request XML to eBay trading API web service and JAXB framework for Java-XML映射。

文末附件包含两个应用实例：AddFixedPriceItemCall 和 getSellerListCall

软件需求
=====================
1. JAXWS2.1.5 或更高版本
- 设置JWSDP_HOME系统变量，指向你的JAXWS2.1.5安装目录。
2.JDK 1.6 或更高版本

指令
============

A. 连接Trading API Schema
     1. 下载新版本的Trading API XSD文件，保存在 ${Trading_XML_Client_HOME}/XSD 文件夹
     2. 执行jaxb-codeGen.xml脚本，生成可代表步骤1中保存的Trading API Schema的Java类
           > ant -f  ${Trading_XML_Client_HOME}/jaxb-codeGen.xml

B.  构建并运行例程

    1. 构建并运行应用例程：AddFixedPriceItemCall
      1.1 打开文件夹：${Trading_XML_Client_HOME}/samples/AddFixedPriceItemCall
      1.2 在Configruation.xml文件中指定你的Sandbox user auth token
      1.3 对此进行必要的修改：${Trading_XML_Client_HOME}/samples/AddFixedPriceItemCall/src/com/ebay/sample/AddFixedPriceItemCall.java
       1.4 执行ant脚本，在Sandbox环境下刊登一个商品
       > ant -f build.xml

    2. 构建并运行应用例程：GetSellerListCall
      1.1 打开文件夹：${Trading_XML_Client_HOME}/samples/GetSellerListCall
      1.2在Configruation.xml文件中指定你的Sandbox user auth token
      1.3 对此进行必要的修改：${Trading_XML_Client_HOME}/samples/GetSellerListCall/src/com/ebay/sample/GetSellerListCall.java
      1.4 执行ant脚本，检索你的active item list
       > ant -f build.xml

实施细节

1. 创建一个Request类型的对象，如GetSellerListRequestType

    // create and initial an GetSellerListRequestType object
    GetSellerListRequestType request = new GetSellerListRequestType();
    XMLRequesterCredentialsType requestCredential = new XMLRequesterCredentialsType();
    requestCredential.setEBayAuthToken(sample.USERTOKEN);
    request.setRequesterCredentials(requestCredential);
    java.util.Calendar nowCal = java.util.Calendar.getInstance();
    java.util.Calendar fromCal = (java.util.Calendar) nowCal.clone();
    XMLGregorianCalendar xmlgregorianTo = toApiTime(nowCal);
    XMLGregorianCalendar xmlgregorianFrom = fromApiTime(fromCal,24);

    request.setErrorLanguage("en_US");
    request.setIncludeWatchCount(Boolean.TRUE);
    request.setStartTimeFrom(xmlgregorianFrom);
    request.setStartTimeTo(xmlgregorianTo);

2. 将JAXB对象（此例程中是GetSellerListRequestType）转换为XML Request文档

         /*
          *  marshal GetSellerListRequestType object to XML data  file
          *
          */
         private String marshalObject2Xml(GetSellerListRequestType requestobj) throws Exception {
             String requestXmlFileName = "GetSellerListRequest.xml";
             jc = JAXBContext.newInstance(JAXB_PACKAGE_NAME);
             Marshaller m = jc.createMarshaller();
             m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
             ObjectFactory of = new ObjectFactory();

             JAXBElement<GetSellerListRequestType> requestElement = of.createGetSellerListRequest(requestobj);
             m.marshal(requestElement, new FileWriter(requestXmlFileName));
             return requestXmlFileName;
         }

3. 创建HttpsURLConnection对象，指定所需的Trading API HTTP Headers 并将生成的XML Request文档发送至Trading API URL ( Sandbox : https://api.sandbox.ebay.com/ws/api.dll).

         /*
          * open SSL https connection and send the request xml data
          *
          */
         public InputStreamReader openConnectionFireRequest(String XmlFileName, String ApiCallName) throws Exception {
             URL url = new URL(SERVERURL);
             // open SSL https connection
             HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
             conn.setRequestMethod("POST");

             conn.setDoInput(true);
             conn.setDoOutput(true);
             conn.setRequestProperty("Content-Type", "text/xml");
             // required headers
             conn.setRequestProperty("X-EBAY-API-COMPATIBILITY-LEVEL", "687");
             conn.setRequestProperty("X-EBAY-API-CALL-NAME", ApiCallName);
             conn.setRequestProperty("X-EBAY-API-SITEID", "0");

             PrintWriter output = new PrintWriter(new OutputStreamWriter(conn.getOutputStream()));
             Thread.sleep(1000);
             String fileContent = convertFileContent2String(XmlFileName);

             System.out.println(conn.getURL());
             System.out.println(fileContent);
             output.println(fileContent);
             output.close();
             conn.connect();
             InputStreamReader isr = new InputStreamReader(conn.getInputStream());
             return isr;
         }

4. 读取HttpsURLConnection中返回的输入流。GetInputStream()到XML字符串，然后将XML文档字符串逆向转换为Java Object （此例程中是GetSellerLisResponseType）

           /*
          * read input stream and unmarshal it into a Java content tree
          */
         public Object unmarshalInputStream(InputStreamReader isr) {
             Object returnedObj = null;
             try {
                 int c = 0;
                 String addFixedPriceItemResponse = "GetSellerListResponse.xml";
                 OutputStream f = new FileOutputStream(addFixedPriceItemResponse);
                 while ((c = isr.read()) > -1) {
                     f.write(c);
                 }
                 f.close();
                 String responseXML = convertFileContent2String(addFixedPriceItemResponse);
                 System.out.println(responseXML);
                 InputStream input = new ByteArrayInputStream(responseXML.getBytes());
                 JAXBContext context = JAXBContext.newInstance(JAXB_PACKAGE_NAME);
                 Unmarshaller unmarshaller = context.createUnmarshaller();
                 JAXBElement<Object> poe = (JAXBElement) unmarshaller.unmarshal(input);
                 returnedObj = poe.getValue();

                 isr.close();
             } catch (Exception e) {
                //handle exception
             }
             return returnedObj;
         }

	附件
	• Trading_XML_Client.zip

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