public class InstantTest01 {
     public static void main(String[] args){
         //静态方法，返回utc上的Instant
         //格式：2019-07-04T01:21:41.027Z
         Instant now = Instant.now();
         System.out.println(now);

         //返回1970年1-1时间加上Time的Instant
         Date date = new Date();
         long time = date.getTime();
         Instant.ofEpochMilli(time);

         //设置时间区域北京位于东八区
         OffsetDateTime offsetDateTime = now.atOffset(ZoneOffset.ofHours(8));
         System.out.println(offsetDateTime.getHour());

         //获取时间戳
         long l = now.toEpochMilli();
         System.out.println(l);
     }
 }