java 查询某一天的数据

	public List findLineDataByProperty(String propertyName, Object value) {
		log.debug("finding VehicleInfo instance with property: " + propertyName
				+ ", value: " + value);
		SimpleDateFormat sf =new SimpleDateFormat("yyyy-MM-dd");
		Calendar rightNow =Calendar.getInstance();
		Date startDate= new Date();
		try {
			startDate = sf.parse( sf.format(startDate));
		} catch (ParseException e) {
			e.printStackTrace();
		}
		rightNow.setTime(startDate);
		rightNow.add( Calendar.DAY_OF_MONTH,1);
	 	Date endDate = rightNow.getTime();
	 	log.info("Start:"+sf.format(startDate)+" End"+sf.format(endDate));
		try {
			String queryString = "from VehicleInfo as model where model."
					+ propertyName + "= ?  and model.Gpstime >=? and model.Gpstime < ? order by model.Gpstime desc";
			return getHibernateTemplate().find(queryString,new Object[]{value,startDate,endDate});
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}