springboot[maven] & 微信小程序[3]申请退款

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    @Autowired
    WeixinMiniProgramPayProperties weixinPayProperties;

    @Override
    public Map refund(String logKey,  String refundOrderNumber, String transactionId, String openId, String fee) throws Exception
    {
        //1.参数封装
        Map param = new HashMap();
        param.put("appid", weixinPayProperties.getAppid());// 公众账号ID
        param.put("mch_id", weixinPayProperties.getMchId());// 商户
        param.put("nonce_str", WXPayUtil.generateNonceStr());// 随机字符串
        param.put("transaction_id", transactionId);// 微信返回的交易订单号param.put("out_trade_no", orderNumber);
//
        param.put("out_refund_no", refundOrderNumber);
        param.put("total_fee", fee); // 金额（分）
        param.put("refund_fee", fee); // 金额（分）
//        param.put("notify_url", weixinPayProperties.getRefundUrl());

        logger.info(logKey + " weixinPayProperties" + weixinPayProperties);

        String sign = WXPayUtil.generateSignature(param, weixinPayProperties.getPartnerkey());
        param.put("sign", sign);
        logger.info(logKey + " weixinService#refund:" + param);

//        HttpClient httpClient = new HttpClient(weixinPayProperties.getRefundUrl());
//        httpClient.setHttps(true);
//        httpClient.setXmlParam(xml2String(param));
//        httpClient.post();

//        String xmlResult = httpClient.getContent();
//        Map<String, String> mapResult = WXPayUtil.xmlToMap(xmlResult);

        String xmlResult = WXHttpCertUtils.doPost(weixinPayProperties.getWechatRefundUrl(), xml2String(param));
        logger.info(logKey + " weixinService#refund.wxpay.mp.xml.result:" + xmlResult);
        Map<String, String> mapResult = WXPayUtil.xmlToMap(xmlResult);
        logger.info(logKey + " weixinService#refund.wxpay.mp.map.result:" + xmlResult);

        Map<String, String> result = new HashMap<>();
        result.put("code", "500");
        result.put("message", "系统错误");

        if("SUCCESS".equalsIgnoreCase(mapResult.get("result_code")))
        {
            result.put("code", "200");
            result.put("message", "支付成功");
        }
        // 转帐失败
        else if ("FAIL".equalsIgnoreCase(mapResult.get("result_code")))
        {
            result.put("code", "500");
            // 系统错误需要重试[请先调用查询接口，查看此次付款结果，如结果为不明确状态（如订单号不存在），请务必使用原商户订单号进行重试。]
            if ("SYSTEMERROR".equalsIgnoreCase(mapResult.get("err_code")))
            {
//                result.put("message", "支付成功");
            }
            // 金额超限
            else if("AMOUNT_LIMIT".equalsIgnoreCase(mapResult.get("err_code")))
            {
                result.put("message", "金额超限");
            }
            // 余额不足
            else if("NOTENOUGH".equalsIgnoreCase(mapResult.get("err_code")))
            {
//                result.put("message", "支付成功");
            }
            // 超过频率限制，请稍后再试。
            else if("FREQ_LIMIT".equalsIgnoreCase(mapResult.get("err_code")))
            {
                result.put("message", "超过频率限制，请稍后再试。");
            }
            // 已经达到今日付款总额上限/已达到付款给此用户额度上限
            else if("MONEY_LIMIT".equalsIgnoreCase(mapResult.get("err_code")))
            {
                result.put("message", "已经达到今日付款总额上限");
            }
            // 无法给非实名用户付款
            else if ("V2_ACCOUNT_SIMPLE_BAN".equalsIgnoreCase(mapResult.get("err_code")))
            {
                result.put("message", "无法给非实名用户付款");
            }
            // 该用户今日付款次数超过限制,如有需要请登录微信支付商户平台更改API安全配置
            else if("SENDNUM_LIMIT".equalsIgnoreCase(mapResult.get("err_code")))
            {
                result.put("message", "今日付款次数超过限制");
            }
        }
        else
        {
            // 系统错误
            result.put("code", "500");
            result.put("message", "系统错误");
        }

        logger.info(logKey + " weixinService#refund.wxpay.mp.result:" + mapResult);
        return result;
    }