LocalDateTime now = LocalDateTime.now();
System.out.println("計算兩個時間的差：");
LocalDateTime end = LocalDateTime.now();
Duration duration = Duration.between(now,end);
long days = duration.toDays(); //相差的天數
long hours = duration.toHours();//相差的小時數
long minutes = duration.toMinutes();//相差的分鍾數
long millis = duration.toMillis();//相差毫秒數
long nanos = duration.toNanos();//相差的納秒數
System.out.println(now);
System.out.println(end);
System.out.println("發送短信耗時【 "+days+"天："+hours+" 小時："+minutes+" 分鍾："+millis+" 毫秒："+nanos+" 納秒】");