public void aliPayNotify(HttpServletResponse response, HttpServletRequest request) {

        logger.info("==========comming进入支付宝回调处理==========");

        Map<String, String> params = new HashMap<>();

        Map requestParams = request.getParameterMap();

        for (Iterator iterator = requestParams.keySet().iterator(); iterator.hasNext(); ) {

            String name = (String) iterator.next();

            String[] values = (String[]) requestParams.get(name);

            String valueStr = "";

            for (int i = 0; i < values.length; i++) {

                valueStr = (i == values.length - 1) ? valueStr + values[i]

                        : valueStr + values[i] + ",";

            }

            //乱码解决，这段代码在出现乱码时使用。

            try {

                valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");

            } catch (UnsupportedEncodingException e) {

                e.printStackTrace();

            }

            params.put(name, valueStr);

            logger.info("========== " + valueStr + "===========");

        }

        try {

            boolean flag = AlipaySignature.rsaCheckV1(params, AliPayConfig.ALIPAY_PUBLIC_KEY, AliPayConfig.CHARSET, "RSA2");

            logger.info("========支付宝回验证结果：  " + flag);

            String orderNo = request.getParameter("out_trade_no");

            //交易状态

            String tradeStatus = request.getParameter("trade_status");

            //验证成功

            if (flag) {

                logger.info("=========支付宝回调签名认证成功=========");

                //验证支付宝通知的参数是否正确

                this.check(params);

                // 另起线程处理业务

                executorService.execute(new Runnable() {

                    @Override

                    public void run() {

                        // 支付成功

                        if ("TRADE_SUCCESS".equals(tradeStatus) || "TRADE_FINISHED".equals(tradeStatus)) {

                            //修改订单状态

                            WaterOrder waterOrder = waterOrderService.loadByOrderNo(orderNo);

                            if (1 == waterOrder.getStatus()) {

                                waterOrder.setStatus(0);

                                waterOrderService.save(waterOrder);

                                System.out.println("支付宝订单支付回调成功！");

                            } else {

                                System.out.println("支付宝订单支付回调异常，订单状态不对！");

                            }

                        } else {

                            logger.error("=========没有处理支付宝回调，支付宝交易状态：{}, params:{}", tradeStatus, params);

                        }

                        //是二维码支付的删除二维码图片

                        File file = new File(UrlConfigUtil.LOCAL_UPLOAD_URL + "qrcode", orderNo + ".png");

                        if (file.exists()) {

                            file.delete();

                        }

                    }

                });

                

            }

            // 如果签名验证正确，立即返回success，后续业务另起线程单独处理

            // 业务处理失败，可查看日志进行补偿，跟支付宝已经没多大关系。

            response.getWriter().write("success");

        } catch (Exception e) {

            e.printStackTrace();

        }



    }