null作为具有业务含义的一部分，不断抛出

1.service中抛出特定的IllegalArgumentException异常

JsonObject responseBody = !Objects.requireNonNull(jsonObject).get("responsebody").toString().equals("null") ? jsonObject.get("responsebody").getAsJsonObject():null;
        if (null == responseBody ) {
            throw new IllegalArgumentException(String.format("获取用户%s信息出错。", erp));
        }
        if (null == responseBody.get("realName") || (responseBody.get("realName") instanceof JsonNull)||"null".equalsIgnoreCase(responseBody.get("realName").toString())){
            throw new IllegalArgumentException(String.format("获取用户%s信息出错。", erp));
        }

2.上层调用方法封装，并抛出IllegalArgumentException异常

public static Receiver createReceiver(NotifyMethod notifyMethod, String code) throws IllegalArgumentException{
        switch (notifyMethod){
            case TIMLINE:
                return new TimLineReceiver().setErp(code);
            case PHONE:
                ContactDto phoneUserInfo = contactService.getUserInfo(code);
                return new PhoneReceiver().setNumber(phoneUserInfo.getPhone()).setErp(code);
            case EMAIL:
                ContactDto emailUserInfo = contactService.getUserInfo(code);
                return new EmailReceiver().setAddress(emailUserInfo.getEmail());
            case OE:
                return new OeReceiver().setErp(code);
            default:
                throw new IllegalArgumentException("未获取到此通知方式对应的Receiver");
        }
    }

3.再上层封装，处理流中对特定异常处理，返回null对象，再进行filter

private Function<String,Receiver> receiverGetter(NotifyMethod notifyMethod){
        return erp -> {
            try {
                return ReceiverFactory.createReceiver(notifyMethod, erp);
            } catch (IllegalArgumentException e) {
                log.error("获取联系人异常:", e);
                return null;
            }
        };
    }
	
public void process(ProcessContext<NotificationModel> context) {
        NotificationModel notificationModel = context.getProcessModel();
        // 不同的通知方式->不同的通知模板->不同的接收人对象
        notificationModel.getAlarmNotificationMap().forEach((notifyMethod, alarmNotificationDto) -> {
            Set<String> erps = ErpListFactory.getErps(notificationModel);
            List<Receiver> receivers = erps
                    .stream()
                    .map(erp -> receiverGetter(notifyMethod).apply(erp))
                    .filter(Objects::nonNull)
                    .collect(Collectors.toList());
            alarmNotificationDto.setReceivers(receivers);
            log.info("消息ID:[{}] @@{}通知方式补齐通知接收人信息完毕,接收人{}", context.processModel.messageId, notifyMethod, JsonUtils.toJSONString(receivers));
        });
    }