ChronoUnit 之间的方法。

此方法将这些时间转换为相同的区域（区域与第一个参数），之后，调用直到在 Temporal 界面中声明的方法： （d1，d2）; $（$）

You can use method between from ChronoUnit.
This method converts those times to same zone (zone from the first argument) and after that, invokes until method declared in Temporal interface:

static long zonedDateTimeDifference(ZonedDateTime d1, ZonedDateTime d2, ChronoUnit unit){
    return unit.between(d1, d2);
}

既然 ZonedDateTime 和 LocalDateTime 实现 Temporal 界面，您也可以为这些日期时间类型编写通用方法：

Since both ZonedDateTime and LocalDateTime implements Temporal interface, you can write also universal method for those date-time types:

static long dateTimeDifference(Temporal d1, Temporal d2, ChronoUnit unit){
    return unit.between(d1, d2);
}

但请记住，调用此方法可以混合 LocalDateTime 和 ZonedDateTime 导致 DateTimeException 。


希望它有帮助。

But keep in mind, that invoking this method for mixed LocalDateTime and ZonedDateTime leads to DateTimeException.

Hope it helps.