一、Long型转成Calendar
Calendar endCalendar=Calendar.getInstance();
endCalendar.setTimeInMillis(endTime);二、通过Calendar获取年月日信息
年：endCalendar.get(Calendar.YEAR)
月：endCalendar.get(Calendar.MONTH)
日：endCalendar.get(Calendar.DAY_OF_MONTH)同样Date类型转成Calendar即多一步将Date先转为Long即可
Long time = new Date().getTime();