StopWatch 记录执行时间

StopWatch watch = new StopWatch("");        watch.start();        Map<String,Object> result = Maps.newHashMap();        Map<String, Object> paramMap = Maps.newHashMap();        paramMap.put("couponId",couponId);        if (doAuthenticate(sign,paramMap)) {            result.putAll(couponOrderFacade.query(paramMap));        } else {            result.put("code", ReadConstant.RETURN_CODE.RETURN_TOKEN_ERROR_CODE);            result.put("msg",ReadConstant.RETURN_MSG.RETURN_TOKEN_ERROR_MSG);        }        result.put("timestamp", sdf.format(new Date()));        watch.stop();        LOG.info("queryCoupon cost:{}",watch.getTotalTimeMillis());        return result;