1 避免大量if判空检查

/**
     * 空置判断
     * @param v
     * @param mes
     * @throws BusinessException
     */
    private void checkNull(Object v,String mes) throws BusinessException{
            if(v==null || "".equals(v)) throw new BusinessException(ExceptionEmnu.NULL,mes);
    }

checkNull(request.getExchangeRate(),"汇率不能为空");

2 避免大量的set语句

ExchangeOrder order=new ExchangeOrder(
                //多机部署需要更换订单号生成策略
                IDProduceUtil.produceEfId(),
                request.getUserPin(),
                //如果时买进则为负数
                request.getAmount().multiply(fh),
                //如果时买进则为负数
                request.getForeignAmount().multiply(fh),
                request.getExchangeRate(),
                request.getForeignCurrency(),
                request.getExchangeType(),
                ORDER_STATUS_SUBMIT
        );
        this.exchangeOrderDao.saveOrder(order);