微信支付-创建订单，调用Native支付接口

    @Transactional(rollbackFor = Exception.class)@Overridepublic Map<String, Object> nativePay(Long productId) throws Exception {log.info("生成订单");//生成订单OrderInfo orderInfo = orderInfoService.createOrderByProductId(productId);String codeUrl = orderInfo.getCodeUrl();if(orderInfo != null && !StringUtils.isEmpty(codeUrl)){log.info("订单已存在，二维码已保存");//返回二维码Map<String, Object> map = new HashMap<>();map.put("codeUrl", codeUrl);map.put("orderNo", orderInfo.getOrderNo());return map;}log.info("调用统一下单API");//调用统一下单APIHttpPost httpPost = new HttpPost(wxPayConfig.getDomain().concat(WxApiType.NATIVE_PAY.getType()));// 请求body参数Gson gson = new Gson();Map paramsMap = new HashMap();paramsMap.put("appid", wxPayConfig.getAppid());paramsMap.put("mchid", wxPayConfig.getMchId());paramsMap.put("description", orderInfo.getTitle());paramsMap.put("out_trade_no", orderInfo.getOrderNo());paramsMap.put("notify_url", wxPayConfig.getNotifyDomain().concat(WxNotifyType.NATIVE_NOTIFY.getType()));Map amountMap = new HashMap();amountMap.put("total", orderInfo.getTotalFee());amountMap.put("currency", "CNY");paramsMap.put("amount", amountMap);//将参数转换成json字符串String jsonParams = gson.toJson(paramsMap);log.info("请求参数 ===> {}" + jsonParams);StringEntity entity = new StringEntity(jsonParams,"utf-8");entity.setContentType("application/json");httpPost.setEntity(entity);httpPost.setHeader("Accept", "application/json");//完成签名并执行请求CloseableHttpResponse response = wxPayClient.execute(httpPost);try {String bodyAsString = EntityUtils.toString(response.getEntity());//响应体int statusCode = response.getStatusLine().getStatusCode();//响应状态码if (statusCode == 200) { //处理成功log.info("成功, 返回结果 = " + bodyAsString);} else if (statusCode == 204) { //处理成功，无返回Bodylog.info("成功");} else {log.info("Native下单失败,响应码 = " + statusCode+ ",返回结果 = " + bodyAsString);throw new IOException("request failed");}//响应结果Map<String, String> resultMap = gson.fromJson(bodyAsString, HashMap.class);//二维码codeUrl = resultMap.get("code_url");//保存二维码String orderNo = orderInfo.getOrderNo();orderInfoService.saveCodeUrl(orderNo, codeUrl);//返回二维码Map<String, Object> map = new HashMap<>();map.put("codeUrl", codeUrl);map.put("orderNo", orderInfo.getOrderNo());return map;} finally {response.close();}}

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