Java实现纪元秒和本地日期时间互换的方法【经典实例】

import java.time.Instant;import java.time.ZoneId;import java.time.ZonedDateTime;public class CurrentDatetime {  public static void main(String[] args) {    // 纪元秒和本地日期时间互换    Instant epochSec = Instant.ofEpochSecond(1000000000L);    ZoneId zId = ZoneId.systemDefault();    ZonedDateTime then = ZonedDateTime.ofInstant(epochSec, zId);    System.out.println("The epoch was a billion seconds old on " + then);  }}