<!--RazorPay start-->
        <dependency>
            <groupId>com.razorpay</groupId>
            <artifactId>razorpay</artifactId>
            <version>指定版本</version>
        </dependency>
<!--RazorPay end-->

//创建razorpay客户端
RazorpayClient createRazorpayClient() {
        String keyId = "razorpay仪表盘的key_id";
        String keySecret = "razorpay仪表盘的key_secret";

        if (StringUtils.isBlank(keyId) || StringUtils.isBlank(keySecret)) {
            throw new BaseException("Please specify API and Secret Key in configuration file");
        }
        RazorpayClient razorpayClient = null;
        try {
            razorpayClient = new RazorpayClient(keyId, keySecret);
        } catch (RazorpayException e) {
            throw new BaseException("razorpayClient创建异常", e);
        }
        if (razorpayClient == null) {
            throw new BaseException("razor pay error");
        }
        return razorpayClient;
    }

    //创建本地订单和razorpay订单,关联订单
    public PayDO createOrder(BigDecimal amount) {
        //省略部分业务逻辑,PayDO为本地支付类

        //传入第三方的金额,精度为分所以要 乘以 100
        BigDecimal razorPayAmount = amount.multiply(new BigDecimal("100"));

        //生成本地随机订单号
        String orderNo = StringRandom.getNumberAndLetterRandom(10);
        RazorpayClient razorpayClient = createRazorpayClient();
        Order order = null;
        try {
            //创建第三方订单
            JSONObject orderRequest = new JSONObject();
            orderRequest.put("amount", razorPayAmount);
            orderRequest.put("currency", "INR");
            orderRequest.put("receipt", orderNo);
            orderRequest.put("payment_capture", false);
            order = razorpayClient.Orders.create(orderRequest);
        } catch (RazorpayException e) {
            logger.error(e.getMessage());
        }

        if (order == null) {
            return BaseResponse.fail("razor order create error");
        }
　　　　　//订单关联,入库
        PayDO payDO = new PayDO();
        payDO.setOrderNo(orderNo);
        payDO.setThirdNo(order.get("id"));
        payDO.setAmount(amount);
        payDO.setStatus("支付中");
        //插入数据库
        int saveSuccess = save(payDO);
        if (saveSuccess <= 0) {
            //创建失败
            return null;
        }
        logger.info("用户,创建支付订单成功,内部订单号:{},第三方订单:{}", orderNo, order.get("id"));

        return payDO;
    }    

@GetMapping("/back/pay")
    public BaseResponse<PayDO> callBackHandelOrderStatus(@RequestParam Map<String,Object> requestJson){
        return payService.handelOrderStatus(requestJson);
}

public BaseResponse<PayDO> handelOrderStatus(Map<String, Object> requestJson) {
if (requestJson == null) {
            return BaseResponse.fail("error params");
        }
        String event = requestJson.get("event") == null ? null : requestJson.get("event").toString();
        //不为空则为回调
        if (StringUtils.isNotBlank(event)) {
            logger.info("支付回调：" + JsonUtils.toJSONString(requestJson));
            JSONObject jsonObject = new JSONObject(JsonUtils.toJSONString(requestJson));
            try {
                //获取rzp那边的id
                String orderId = jsonObject.getJSONObject("payload").getJSONObject("payment").getJSONObject("entity").getString("order_id");
                if (StringUtils.isNotBlank(orderId)) {
　　　　　　　　　　　　//通过rzp的id查询本地是否存在
                    PayDO payDO = getByOutNo(orderId);
                    if (payDO != null) {
                        if ("支付成功".equals(payDO.getStatus())) {
　　　　　　　　　　　　　　　　　　//成功
                            return BaseResponse.success();
                        }
　　　　　　　　　　　　　　//业务代码省略,文字说明
　　　　　　　　　　　　　　//再次校验rzp支付状态,如果为成功且本地为支付中,那么更新本地状态
                        return BaseResponse.success();
                    }
                }
            } catch (Exception e) {
                logger.error("支付回调处理异常", e);
                return BaseResponse.fail("error params");
            }
        }
    }