String appSecret = "******"; // 注冊的應用的密鑰，請使用你自己應用的密鑰

       String taobaoApiName = "taobao.trade.get"; // 交易類api

       String sessionId = "1234567";//sessionId是isv應用自己生成的字符串

//確保每個使用該應用的用戶各自的sessionId各不相同

       SimpleDateFormat formater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

       Map params = new HashMap();

       params.put("sip_appkey", appId);

       params.put("sip_apiname", taobaoApiName);

       params.put("sip_timestamp", formater.format(new Date()));

       params.put("sip_sessionid", sessionId);

       params.put("fields", "seller_nick,buyer_nick,title,type,created,sid");

       params.put("tid", "******"); //請設置你要查詢的交易號

       params.put("format", "xml");

       params.put("v", "1.0");

       params.put("sip_sign", getSign(appSecret, params));

       String result = requestOpenApi(sipRequestUrl, params);

       if (result != null && result.startsWith("sip_isp_loginurl:")) {

           result = result.replaceAll("&", "&");

           System.out.println("打開瀏覽器，訪問下面的URL進行用戶授權，授權成功后" +

                  "，再次運行該類就可以調用api獲取交易信息");

           System.out.println(result.substring("sip_isp_loginurl:".length()));

       } else if (result != null)

           System.out.println(result);

    }

    /**

     * 請求淘寶Open API服務

     * @param url 服務集群平臺入口

     * @param params 請求參數

     * @return 請求結果

     */

    public static String requestOpenApi(String url, Map params) {

       HttpClient client = new HttpClient();

       PostMethod postMethod = new PostMethod(url);

       try {

           NameValuePair[] postData = new NameValuePair[params.size()];

           Iterator iters = params.keySet().iterator();

           int i = 0;

           while (iters.hasNext()) {

              String key = (String) iters.next();

              postData[i] = new NameValuePair(key, params.get(key).toString());

              i++;

           }

           postMethod.setRequestBody(postData);

           client.executeMethod(postMethod);

           String resultCode = postMethod.getResponseHeader("sip_status")

                  .getValue();

           if (resultCode == null || ("".equals(resultCode)))

              return null;

           else if ("1004".equals(resultCode))

              return "sip_isp_loginurl:"

                     + postMethod.getResponseHeader("sip_isp_loginurl")

                            .getValue();

           else if (!"9999".equals(resultCode))

              return resultCode

                     + ":"

                     + postMethod.getResponseHeader("sip_errormessage")

                            .getValue();

           return postMethod.getResponseBodyAsString();

       } catch (Exception ex) {

           ex.printStackTrace();

       } finally {

           if (postMethod != null)

              postMethod.releaseConnection();

       }

       return null;

    }

    /**

     * 對所有參數進行簽名

     * @param secret APP ID對應的密鑰

     * @param params 請求中所有的參數

     * @return 簽名

     */

    public static String getSign(String secret, Map params) {

       if (secret == null || "".equals(secret) || params == null)

           throw new RuntimeException(

                  "secret or params is null or blank, please check");

       StringBuilder sb = new StringBuilder().append(secret);

       String result = null;

       try {

           Set sortedKeys = new TreeSet();

           sortedKeys.addAll(params.keySet());

           for (String key : sortedKeys)

              sb.append(key).append(params.get(key));

           MessageDigest md = MessageDigest.getInstance("MD5");

           result = byteTohex(md.digest(sb.toString().getBytes("utf-8")));

       } catch (Exception e) {

           throw new RuntimeException(e);

       }

       return result;

    }

    public static String byteTohex(byte[] b) {

       StringBuffer sb = new StringBuffer();

       String stmp = "";

       for (int n = 0; n < b.length; n++) {

           stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));

           if (stmp.length() == 1)

              sb.append("0").append(stmp);

           else

              sb.append(stmp);

       }

       return sb.toString().toUpperCase();

    }

}