Java开发SSM框架微信退款的实现

    String outTradeNo = request.getParameter("outTradeNo");// 获取商户订单号
 
 Integer totalFee = Integer.parseInt(request.getParameter("totalFee"));// 获取支付金额
 
 Map<String, String> getMap = new HashMap<String, String>();
 // 获得当前目录
 String path = request.getSession().getServletContext().getRealPath("/");
 
 Date now = new Date();
 SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");// 可以方便地修改日期格式
 String outRefundNo = "NO" + dateFormat.format(now);

    RefundReqData refundReqData = new RefundReqData();
 refundReqData.setAppid(Configure.getAppID());
 refundReqData.setMch_id(Configure.getMch_id());
 refundReqData.setNonce_str(RandomStringGenerator.getRandomStringByLength(32));
 refundReqData.setOut_trade_no(outTradeNo);
 refundReqData.setOut_refund_no(outRefundNo);
 refundReqData.setTotal_fee(totalFee);
 refundReqData.setRefund_fee(refundFee);
 refundReqData.setOp_user_id(Configure.getMch_id());
 refundReqData.setNotify_url("https://weixin.qq.com/notify/");
    String sign = Signature.getSign(refundReqData);// 生成签名
 refundReqData.setSign(sign);

ArrayList<String> list = new ArrayList<String>();
    @SuppressWarnings("rawtypes")
 Class cls = o.getClass();
    Field[] fields = cls.getDeclaredFields();
    for (Field f : fields) {
      f.setAccessible(true);
      if (f.get(o) != null && f.get(o) != "") {
       String name = f.getName();
       XStreamAlias anno = f.getAnnotation(XStreamAlias.class);
       if(anno != null)
       name = anno.value();
        list.add(name + "=" + f.get(o) + "&");
      }
    }
    int size = list.size();
    String [] arrayToSort = list.toArray(new String[size]);
    Arrays.sort(arrayToSort, String.CASE_INSENSITIVE_ORDER);
    StringBuilder sb = new StringBuilder();
    for(int i = 0; i < size; i ++) {
      sb.append(arrayToSort[i]);
    }
    String result = sb.toString();
    result += "key=" + Configure.getKey();
    System.out.println("签名数据："+result);
    result = MD5Util.MD5Encode(result,"utf-8").toUpperCase();
    return result;

private static XStream xstream = new XStream(new XppDriver() {
     public HierarchicalStreamWriter createWriter(Writer out) {
       return new PrettyPrintWriter(out) {
         // 对所有xml节点的转换都增加CDATA标记
         boolean cdata = true;
 
         //@SuppressWarnings("unchecked")
         public void startNode(String name, Class clazz) {
           super.startNode(name, clazz);
         }
 
         protected void writeText(QuickWriter writer, String text) {
           if (cdata) {
             writer.write("<![CDATA[");
             writer.write(text);
             writer.write("]]>");
           } else {
             writer.write(text);
           }
         }
       };
     }
   });

 public String httpsRequest(String url, String xmlObj, String path) throws Exception {
 // 加载证书
 initCert(path);
 
 String result = null;
 
 HttpPost httpPost = new HttpPost(url);
 
 // 得指明使用UTF-8编码，否则到API服务器XML的中文不能被成功识别
 StringEntity postEntity = new StringEntity(xmlObj, "UTF-8");
 httpPost.addHeader("Content-Type", "text/xml");
 httpPost.setEntity(postEntity);
 
 // 设置请求器的配置
 httpPost.setConfig(requestConfig);
 
 try {
  HttpResponse response = httpClient.execute(httpPost);
 
  HttpEntity entity = response.getEntity();
 
  result = EntityUtils.toString(entity, "UTF-8");
 
 } catch (ConnectionPoolTimeoutException e) {
  e.printStackTrace();
 } catch (ConnectTimeoutException e) {
  e.printStackTrace();
 
 } catch (SocketTimeoutException e) {
  e.printStackTrace();
 
 } catch (Exception e) {
  e.printStackTrace();
 
 } finally {
  httpPost.abort();
 }
 
 return result;
 }

RefundRequest refundRequest = new RefundRequest();
  String result = refundRequest.httpsRequest("https://api.mch.weixin.qq.com/secapi/pay/refund", info, path);
 
  getMap = MobiMessage.parseXml(new String(result.toString().getBytes(), "utf-8"));
  System.out.println(getMap + "............getMap");
  json.put("return_msg", getMap.get("return_msg"));
  json.put("return_code", getMap.get("return_code"));
  json.put("outTradeNo", outTradeNo);