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

//創建razorpay客戶端
RazorpayClient createRazorpayClient() {
        String keyId = "razorpay儀錶盤的key_id";
        String keySecret = "razorpay儀錶盤的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創建異常", e);
        }
        if (razorpayClient == null) {
            throw new BaseException("razor pay error");
        }
        return razorpayClient;
    }

    //創建本地訂單和razorpay訂單,關聯訂單
    public PayDO createOrder(BigDecimal amount) {
        //省略部分業務邏輯,PayDO為本地支付類

        //傳入第三方的金額,精度為分所以要 乘以 100
        BigDecimal razorPayAmount = amount.multiply(new BigDecimal("100"));

        //生成本地隨機訂單號
        String orderNo = StringRandom.getNumberAndLetterRandom(10);
        RazorpayClient razorpayClient = createRazorpayClient();
        Order order = null;
        try {
            //創建第三方訂單
            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");
        }
　　　　　//訂單關聯,入庫
        PayDO payDO = new PayDO();
        payDO.setOrderNo(orderNo);
        payDO.setThirdNo(order.get("id"));
        payDO.setAmount(amount);
        payDO.setStatus("支付中");
        //插入數據庫
        int saveSuccess = save(payDO);
        if (saveSuccess <= 0) {
            //創建失敗
            return null;
        }
        logger.info("用戶,創建支付訂單成功,內部訂單號:{},第三方訂單:{}", 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();
        //不為空則為回調
        if (StringUtils.isNotBlank(event)) {
            logger.info("支付回調：" + JsonUtils.toJSONString(requestJson));
            JSONObject jsonObject = new JSONObject(JsonUtils.toJSONString(requestJson));
            try {
                //獲取rzp那邊的id
                String orderId = jsonObject.getJSONObject("payload").getJSONObject("payment").getJSONObject("entity").getString("order_id");
                if (StringUtils.isNotBlank(orderId)) {
　　　　　　　　　　　　//通過rzp的id查詢本地是否存在
                    PayDO payDO = getByOutNo(orderId);
                    if (payDO != null) {
                        if ("支付成功".equals(payDO.getStatus())) {
　　　　　　　　　　　　　　　　　　//成功
                            return BaseResponse.success();
                        }
　　　　　　　　　　　　　　//業務代碼省略,文字說明
　　　　　　　　　　　　　　//再次校驗rzp支付狀態,如果為成功且本地為支付中,那麼更新本地狀態
                        return BaseResponse.success();
                    }
                }
            } catch (Exception e) {
                logger.error("支付回調處理異常", e);
                return BaseResponse.fail("error params");
            }
        }
    }