public static String getDateTimePoor( Date startDate ,Date endDate ) {long nd = 1000 * 24 * 60 * 60;long nh = 1000 * 60 * 60;long nm = 1000 * 60;// long ns = 1000;// 获得两个时间的毫秒时间差异long diff = endDate.getTime() - startDate.getTime();// 计算差多少天long day = diff / nd;// 计算差多少小时long hour = diff % nd / nh;// 计算差多少分钟long min = diff % nd % nh / nm;// 计算差多少秒//输出结果// long sec = diff % nd % nh % nm / ns;return day + "天" + hour + "小时" + min + "分钟";}public static String getDatePoor( Date startDate ,Date endDate ) {long nd = 1000 * 24 * 60 * 60;long nh = 1000 * 60 * 60;long nm = 1000 * 60;long ns = 1000 ;// long ns = 1000;// 获得两个时间的毫秒时间差异long diff = endDate.getTime() - startDate.getTime();// 计算差多少天//long day = diff / nd;// 计算差多少小时long hour = diff  / nh;// 计算差多少分钟long min = diff  % nh / nm;// 计算差多少秒//输出结果long sec = diff  % nh % nm / ns;return   hour + "时" + min + "分"+ sec + "秒";//17时20分32秒}public static void main(String[] args) {Date date1 = parseYyyyMMddHHmmss("2020-11-13 15:18:15");Date date2 = parseYyyyMMddHHmmss("2020-11-14 16:19:16");String datePoor = getDatePoor(date1, date2);System.out.println();}