java对接银联商务公众号+服务窗支付（4）
java实现银联商务公众号+服务窗对接----退款查询
本文对接银联商务公众号+服务窗支付，实现支付下单、订单查询、订单退款、退款查询和订单关闭几个功能，使用到银联商务的公众+服务窗支付接口规范，请自行百度下载。
在上两篇支付下单和下单查询和订单退款中，已经实现公众号下单支付、下单查询、订单退款功能的实现和接口的封装，本篇将介绍退款查询的对接实现，并将我使用到的银联商务的请求接口和响应接口进行封装，使用测试网页输出测试信息。
一、接口及代码实现
1.订单退款接口
1.1接口规范
接口规范请查看下载的银联商务公众号+服务窗接口规范退款接口接口部分，这里不做展示。
1.2 代码实现
1.2.1 UnifieRefundQueryController代码
/**
* 退款查询接口
* @param request
* @param response
* @param refundOrderId
* @return
* @throws UnsupportedEncodingException
*/
@RequestMapping(value = "/RefundQuery", method = RequestMethod.POST)
// public Map query(HttpServletRequest request, HttpServletResponse response, String refundOrderId) throws UnsupportedEncodingException {
// Map map = new HashMap();
// map.put("merOrderId", refundOrderId); //退款订单号
// Map refundquerymap = refundqueryserviceimpl.RefundQuery(map);
// logger.info("refundquerymap = " + refundquerymap);
// return refundquerymap; //返回map
// }
public Map<String, Object> query(HttpServletRequest request, HttpServletResponse response, @RequestBody String jsonreq) throws UnsupportedEncodingException {
Map<String,Object> map = new HashMap<String,Object>(); //接收退款查询请求map
Map<String,Object> reqmap = new HashMap<String,Object>(); //客户端原始请求map
Map<String,Object> datamap = new HashMap<String,Object>(); //客户端原始请求Data数据
Map<String,Object> resultmap = new HashMap<String,Object>(); //返回结果
//接收客户端请求数据并转换成map
reqmap = JsonUtils.JsonToMapObj(jsonreq);
logger.info("unifiedquery reqmap = " + reqmap);
datamap = (Map<String, Object>) reqmap.get("tradeParam"); //tradeParam请求体数据
logger.info("unifiedquery datamap = " + datamap);
//----------------------------step1 验证签名-----------------------------
String sign = (String) reqmap.get("sign"); //获取sign
String key = UnionPayConstants.GGMD5KEY; //国光MD5密钥
try {
if (!PayUtil.verifySign(datamap,key,sign)) {
resultmap.put("returnCode", "Bad_Sing");
resultmap.put("returnInfo", "签名错误");
return resultmap;
}
//-----------------------step2 验证消息类型 tradeType:refundQuery-------------
if (!"refundQuery".equals(reqmap.get("tradeType"))) {
resultmap.put("returnCode", "TradeType_Error");
resultmap.put("returnInfo", "消息类型不符");
return resultmap;
}
//------------------------step3验证传参完整性----------------------------------
//验证公共参数完整性
if(!PayUtil.verifyParameter(datamap)) {
resultmap.put("returnCode", "Common_Value_Error");
resultmap.put("returnInfo", "缺少必要公共参数");
return resultmap;
}
//验证接口参数完整性
if(datamap.get("refundOrderId").equals("")) {
resultmap.put("returnCode", "Value_Error");
resultmap.put("returnInfo", "缺少必要接口参数");
return resultmap;
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
resultmap.put("returnCode", "System_Error");
resultmap.put("returnInfo", "系统异常");
return resultmap;
}
//------------------------step4 传值并调用退款查询接口---------------------------
map.put("mid", datamap.get("mid")); //商户号
map.put("tid", datamap.get("tid")); //终端号
map.put("instMid", datamap.get("instMid")); //机构商户号
map.put("msgSrc", datamap.get("msgSrc")); //消息来源
map.put("merOrderId", datamap.get("refundOrderId")); //退款订单号
Map<String, Object> refundquerymap = refundqueryserviceimpl.RefundQuery(map);
logger.info("refundquerymap = " + refundquerymap);
if(!"200".equals(refundquerymap.get("statuscode"))) {
resultmap.put("returnCode", "Union_Connect_Error");
resultmap.put("returnInfo", "银联网付连接失败");
return resultmap;
}
//------------------------step5接口返回数据----------------------------------
Map<String,Object> resultdatamap = new HashMap<String,Object>(); //resultmap中data数据
resultdatamap.put("errCode", refundquerymap.get("errCode")); //平台错误码
resultdatamap.put("status", refundquerymap.get("status")); //交易状态
resultdatamap.put("totalAmount", refundquerymap.get("totalAmount")); //退款金额
resultdatamap.put("targetSys", refundquerymap.get("targetSys")); //目标平台代码（第三方代码）
resultdatamap.put("targetStatus", refundquerymap.get("targetStatus")); //目标平台状态
resultdatamap.put("refundStatus", refundquerymap.get("refundStatus")); //支付时间
resultdatamap.put("refundOrderId", refundquerymap.get("refundOrderId")); //平台退款订单号
resultdatamap.put("refundTargetOrderId", refundquerymap.get("refundTargetOrderId")); //第三方退款订单号
resultdatamap.put("messageType", refundquerymap.get("msgType")); //消息类型
resultmap.put("data", resultdatamap);
resultmap.put("returnCode", refundquerymap.get("errCode"));
//resultmap.put("returnInfo", refundquerymap.get("errMsg"));
return resultmap;
}1.2.2 refundqueryserviceimpl代码
本部分代码为银联商务公众号退款查询接口服务实现类。
@Override
public Map<String, Object> RefundQuery(Map<String, Object> map) throws UnsupportedEncodingException {
// TODO Auto-generated method stub
logger.info("------------------refundquery--------------------------");
Map<String, Object> reqmap = new HashMap<String, Object>(); //请求map
Map<String, Object> resp = new HashMap<String, Object>(); //响应resp
reqmap.put("mid", map.get("mid").toString()); //商户号
reqmap.put("tid", map.get("tid").toString()); //终端号
reqmap.put("instMid", map.get("instMid").toString());
reqmap.put("msgSrc", map.get("msgSrc").toString()); //消息来源
reqmap.put("msgId", "UnionPay_F004"); //退款查询
reqmap.put("msgType", "refundQuery"); //消息类型
//报文请求时间
String aligetTime = PayUtil.aligetTime();
logger.info("请求时间aligetTime = " + aligetTime);
reqmap.put("requestTimestamp", aligetTime);
reqmap.put("merOrderId", map.get("merOrderId").toString()); //退货订单号，前端传入
//生成待签名字符串并进行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 block
e.printStackTrace();
}
reqmap.put("sign", builderSignStr);
logger.info("reqmap= " + reqmap);
String jsonstring = GGitUtil.MapToJson2(reqmap); //请求map转成json string
logger.info("发送refundquery post请求消息：" + jsonstring);
//接收银联商务返回map
resp = unionpayrequest.dopost(UnionPayConstants.queryURL, jsonstring);
return resp;
}1.3测试结果
本文对所写接口写了测试网页进行测试，填入退款接口中生成的商户退款订单号，结果如图所示。封装的银联商务响应接口中，返回商户退款订单号，第三方退款订单号，消息类型、退款状态等，其中消息类型messageType为wx.refundQuery，退款状态status为TRADE_SUCCESS，表示退款查询成功。
