java實現銀聯商務公眾號+服務窗對接----訂單退款

本文對接銀聯商務公眾號+服務窗支付，實現支付下單、訂單查詢、訂單退款、退款查詢和訂單關閉幾個功能，使用到銀聯商務的公眾+服務窗支付接口規范，請自行百度下載。
在上兩篇支付下單和下單查詢中，已經實現公眾號下單支付和下單查詢功能的實現和接口的封裝，本篇將介紹退款接口的對接實現，并將我使用到的銀聯商務的請求接口和響應接口進行封裝，使用測試網頁輸出測試信息。
一、接口及代碼實現
1.訂單退款接口
1.1接口規范
接口規范請查看下載的銀聯商務公眾號+服務窗接口規范退款接口接口部分，這里不做展示。
1.2 代碼實現
1.2.1 UnifieRefundController代碼

/*** 退款接口* @param request* @param response* @param merOrderId* @param refundAmount* @return* @throws UnsupportedEncodingException*/@RequestMapping(value = "/OrderRefund", method = RequestMethod.POST)public Map<String, Object> query(HttpServletRequest request, HttpServletResponse response, @RequestBody String jsonreq) throws UnsupportedEncodingException { Map<String,Object> map = new HashMap<String,Object>(); //接收退款請求mapMap<String,Object> reqmap = new HashMap<String,Object>(); //客戶端原始請求mapMap<String,Object> datamap = new HashMap<String,Object>(); //客戶端原始請求Data數據Map<String,Object> resultmap = new HashMap<String,Object>(); //返回結果//接收客戶端請求數據并轉換成mapreqmap = JsonUtils.JsonToMapObj(jsonreq);logger.info("unifiedquery reqmap = " + reqmap);datamap = (Map<String, Object>) reqmap.get("tradeParam"); //tradeParam請求體數據logger.info("unifiedquery datamap = " + datamap);//-------------------------step1 驗證簽名-----------------------------String sign = (String) reqmap.get("sign"); //獲取signString key = UnionPayConstants.GGMD5KEY; //國光MD5密鑰try {if (!PayUtil.verifySign(datamap,key,sign)) {resultmap.put("returnCode", "Bad_Sign");resultmap.put("returnInfo", "簽名錯誤");return resultmap;}//-----------------------step2 驗證消息類型 tradeType:refund-------------------if (!"refund".equals(reqmap.get("tradeType"))) {resultmap.put("returnCode", "TradeType_Error");resultmap.put("returnInfo", "消息類型不符");return resultmap;}//------------------------step3 驗證傳參完整性----------------------------------//驗證公共參數完整性if(!PayUtil.verifyParameter(datamap)) {resultmap.put("returnCode", "Common_Value_Error");resultmap.put("returnInfo", "缺少必要公共參數");return resultmap;}//驗證接口參數完整性if(datamap.get("merOrderId").equals("") || datamap.get("refundAmount").equals("")) {resultmap.put("returnCode", "Value_Error");resultmap.put("returnInfo", "缺少必要接口參數");return resultmap;}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();resultmap.put("returnCode", "System_Error");resultmap.put("returnInfo", "系統異常");return resultmap;}//------------------------step4 傳值并調用退款接口--------------------------------map.put("mid", datamap.get("mid")); //商戶號map.put("tid", datamap.get("tid")); //終端號map.put("instMid", datamap.get("instMid")); //機構商戶號map.put("msgSrc", datamap.get("msgSrc")); //消息來源map.put("merOrderId", datamap.get("merOrderId")); //原支付訂單號map.put("refundAmount", datamap.get("refundAmount")); //退款金額Map<String, Object> refundmap = refundserviceimpl.Refund(map);logger.info("refundmap = " + refundmap);if(!"200".equals(refundmap.get("statuscode"))) {resultmap.put("returnCode", "Union_Connect_Error");resultmap.put("returnInfo", "銀聯網付連接失敗");return resultmap;}//------------------------step5接口返回數據----------------------------------Map<String,Object> resultdatamap = new HashMap<String,Object>(); //resultmap中data數據resultdatamap.put("errCode", refundmap.get("errCode")); //平臺錯誤碼resultdatamap.put("status", refundmap.get("status")); //交易狀態resultdatamap.put("totalAmount", refundmap.get("totalAmount")); //退款金額resultdatamap.put("targetSys", refundmap.get("targetSys")); //目標平臺代碼（第三方代碼）resultdatamap.put("targetStatus", refundmap.get("targetStatus")); //目標平臺狀態resultdatamap.put("refundStatus", refundmap.get("refundStatus")); //支付時間resultdatamap.put("refundOrderId", refundmap.get("refundOrderId")); //平臺退款訂單號resultdatamap.put("refundTargetOrderId", refundmap.get("refundTargetOrderId")); //第三方退款訂單號resultdatamap.put("messageType", refundmap.get("msgType")); //消息類型resultmap.put("data", resultdatamap);resultmap.put("returnCode", refundmap.get("errCode")); //resultmap.put("returnInfo", refundmap.get("errMsg"));return resultmap; }

1.2.2 refundserviceimpl代碼

本部分代碼為銀聯商務公眾號退款接口服務實現類。

public Map<String, Object> Refund(Map<String, Object> map) throws UnsupportedEncodingException {// TODO Auto-generated method stublogger.info("------------------refund--------------------------");Map<String, Object> reqmap = new HashMap<String, Object>(); //請求mapMap<String, Object> resp = new HashMap<String, Object>(); //響應respreqmap.put("mid", map.get("mid").toString()); //商戶號,前端傳入reqmap.put("tid", map.get("tid").toString()); //終端號reqmap.put("instMid",map.get("instMid").toString()); //業務類型reqmap.put("msgSrc", map.get("msgSrc").toString()); //消息來源reqmap.put("msgId", "UnionPay_F003"); reqmap.put("msgType", "refund"); //消息類型//報文請求時間String aligetTime = PayUtil.aligetTime();logger.info("請求時間aligetTime = " + aligetTime);reqmap.put("requestTimestamp", aligetTime); reqmap.put("merOrderId", map.get("merOrderId").toString()); //原商戶交易訂單號，前端傳入reqmap.put("refundAmount", map.get("refundAmount").toString()); //退款金額,前端傳入//下單時未上送分賬標識，上傳分賬標識，需進一步討論退款金額reqmap.put("refundDesc", "訂單退款"); //退款說明//生成退款訂單號String refundorderid = GGitUtil.createOrderID();StringBuffer buff = new StringBuffer(); buff.append(this.msgSrcId); //來源編號3194buff.append(refundorderid);reqmap.put("refundOrderId", buff.toString());//生成待簽名字符串并進行MD5加密String builderSignStr = "";try {builderSignStr = PayUtil.builderSignStr(reqmap,UnionPayConstants.MD5KEY);//signString = PayUtil.generateSignature(reqmap, UnionPayConstants.MD5KEY);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}reqmap.put("sign", builderSignStr);logger.info("reqmap= " + reqmap);String jsonstring = GGitUtil.MapToJson2(reqmap); //請求map轉成json stringlogger.info("發送refund post請求消息：" + jsonstring);//接收銀聯商務返回退款mapresp = unionpayrequest.dopost(UnionPayConstants.queryURL, jsonstring);return resp;}

1.3測試結果
本文對所寫接口寫了測試網頁進行測試，如圖所示。封裝的銀聯商務響應接口中，返回商戶退款訂單號，第三方退款訂單號，消息類型、退款狀態等，其中退款狀態status為TRADE_SUCCESS，表示退款操作成功，此時查看微信支付記錄中，可以看到退款到賬信息。

總結

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