Spring Boot中的微信支付（小程序）

@ApiOperation(value = "统一下单接口")@RequestMapping(value = "/unifiedOrder",method = RequestMethod.POST)public AjaxResult unifiedOrder(HttpServletRequest req,@RequestBody){    //校验小程序（微信）用户登录
    //查询数据库订单信息（状态）
    //只有未支付订单才能发起支付
    //0元购买不调支付
    /**
     * 设置商户、小程序相关请求参数
     * */
    //获取小程序的appId
    String appId = WxMaUtil.getAppId(request);    WxPayUnifiedOrderRequest wxPayUnifiedOrderRequest = new WxPayUnifiedOrderRequest();
    wxPayUnifiedOrderRequest.setAppid(appId);    //商品名称
    String body = sysOrdersCourse.getCourseName();
    body =body.length() >  ? body.substring(,) : body;
    wxPayUnifiedOrderRequest.setBody(body);    //订单编号
    wxPayUnifiedOrderRequest.setOutTradeNo(sysOrders.getOrderNo());    //订单金额
    wxPayUnifiedOrderRequest.setTotalFee(sysOrders.getOrderAmount().multiply(new             BigDecimal()).intValue());    //交易类型
    wxPayUnifiedOrderRequest.setTradeType("JSAPI");    //支付回调地址
         wxPayUnifiedOrderRequest.setNotifyUrl(env.getProperty("notify-host")+"/wx/api/order/notify-order");
    wxPayUnifiedOrderRequest.setSpbillCreateIp("127.0.0.1");    //用户在当前小程序中的唯一标识
    wxPayUnifiedOrderRequest.setOpenid(wxUser.getOpenId());    //调用微信服务类
    WxPayService wxPayService = WxPayConfiguration.getPayService();    return AjaxResult.success(JSONUtils.parse(wxPayService.createOrder(wxPayUnifiedOrderRequest)));
}

@ApiOperation(value = "创建订单")
    @RequestMapping(value = "/create",method = RequestMethod.POST)
    public AjaxResult create(@RequestBody WxOrderRequest wxOrderRequest){        //微信用户信息
        //判断是否购买过相同商品，若已经购买过，则无法创建新的订单
        //满足条件后将数据插入数据库
         WxOrderResponse wxOrderResponse = orderService.add(wxOrderRequest);        //如果新增失败，则返回提示
         if (wxOrderResponse == null){             return AjaxResult.error("订单创建失败");
         }         return AjaxResult.success(wxOrderResponse);
     }

@ApiOperation(value = "取消订单")@RequestMapping(value = "/cancel/{orderId}",method = RequestMethod.PUT)
    public AjaxResult cancel(@PathVariable Long orderId){        //判断订单是否存在
        SysOrders sysOrders = sysOrdersService.getById(orderId);        if(sysOrders==null){            return AjaxResult.error("订单不存在");
        }        //只有未支付的订单能取消
        if(!CommonConstants.NO.equals(sysOrders.getIsPay())){            return AjaxResult.error(MyReturnCode.ERR_70001.getCode(), MyReturnCode.ERR_70001.getMsg());
        }
        sysOrdersService.orderCancel(sysOrders);        return AjaxResult.success();
    }

@ApiOperation(value = "订单详情")@RequestMapping(value = "/myOrderDetail/{orderId}",method = RequestMethod.GET)@ApiImplicitParams({@ApiImplicitParam(name = "orderId", value = "订单Id")})     public AjaxResult myOrderDetail(@PathVariable Long orderId){     //从数据库获取详情参数
     SysOrderDetailResponse detailResponse = sysOrdersService.getDetail(orderId);     return AjaxResult.success(detailResponse);
     }

    /**
     * 订单详情页面参数处理
     * @param orderId
     * @return sysOrderDetailResponse
     */
    @Override
    public SysOrderDetailResponse getDetail(Long orderId) {        SysOrderDetailResponse sysOrderDetailResponse =  orderMapper.getDetail(orderId);        //对页面的手机号做处理
        String phoneNum = sysOrderDetailResponse.getMobile();
        sysOrderDetailResponse.setMobile(phoneNum.substring(,) + "****" +       phoneNum.substring(,phoneNum.length()));        //根据订单状态不同，显示不同的数据
        //计算剩余待支付时间并展示
        return sysOrderDetailResponse;
    }

@ApiOperation("支付回调")@RequestMapping(value = "notify-order", method = RequestMethod.POST)
    public String notifyOrder(@RequestBody String xmlData) throws WxPayException {
        log.info("支付回调：" + xmlData);        //微信支付服务
        WxPayService wxPayService = WxPayConfiguration.getPayService();        WxPayOrderNotifyResult notifyResult = wxPayService.parseOrderNotifyResult(xmlData);
        log.info("支付回调解析结果" + notifyResult);        //对创建的订单进行支付
        SysOrders sysOrders = orderService.getOne(notifyResult.getOutTradeNo());        if (sysOrders != null) {            if (sysOrders.getOrderAmount().multiply(new BigDecimal()).intValue() == notifyResult.getTotalFee()){                 String timeEnd = notifyResult.getTimeEnd();                 LocalDateTime paymentTime = LocalDateTimeUtils.parse(timeEnd);                 //支付时间
                 sysOrders.setPaymentTime(paymentTime);
                 sysOrders.setOrderAmount(sysOrders.getOrderAmount());                 //微信订单编号
                 sysOrders.setTransactionId(notifyResult.getTransactionId());                 //更新数据库
                 orderService.notifyOrder(sysOrders);
                 log.info("支付回调成功通知：" + sysOrders.getOrderNo());                 return WxPayNotifyResponse.success("支付成功");
            } else {                 return WxPayNotifyResponse.fail("付款金额与订单金额不符");
            }
        } else {            return WxPayNotifyResponse.fail("无此订单");
        }
    }

@Override
    @Transactional(rollbackFor = Exception.class)
    public void notifyOrder(SysOrders sysOrders) {       //只有未支付订单能操作，即is_pay字段为0的订单
       if(CommonConstants.NO.equals(sysOrders.getIsPay())) {       //更新订单支付状态
       sysOrders.setIsPay(CommonConstants.YES);
       sysOrders.setStatus(OrderInfoEnum.STATUS_1.getValue());
       sysOrdersMapper.updateById(sysOrders);       //更新商品表状态
       //更新订单生命周期表
       }
    }