Java的一些常用时间操作
时间相减得到天数
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); Date startdate = format.parse(pd.getString("startdate")); Date enddate = format.parse(pd.getString("enddate")); daynumber = new BigInteger(String.valueOf(enddate.getTime())).subtract(new BigInteger(String.valueOf(startdate.getTime()))).divide (new BigInteger("86400000")).intValue()+1;
(24 * 60 * 60 * 1000)