在 java.time 中从 `ZonedDateTime` 获取 `Instant`

Question

给定一个 ZonedDateTime in the java.time package of Java 8 and later, how does one obtain an Instant?

换个方向（Instant → ZonedDateTime）就是：

ZonedDateTime zdt = ZonedDateTime.ofInstant( instant , zoneId ) ;

需要从 ZonedDateTime → Instant 转换为老派 java.util.Date class.

java.util.Date date = Date.fromInstant( instant ) ;

Answer 1

您可以使用 toInstant() default method from ChronoZonedDateTime interface (which is inherited by ZonedDateTime.