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Java ChronoLocalDateTime toEpochSecond()用法及代码示例

ChronoLocalDateTime类的toEpochSecond()方法用于将此ChronoLocalDateTime转换为自1970-01-01T00:00:00Z以来的秒数。该方法将此ChronoLocalDateTime与作为参数传递的偏移量相结合,以计算epoch-second值,该值是从1970-01-01T00:00:00Z开始经过的秒数。时期之后的时间轴上的瞬间为正,早期为负。

用法:

default long toEpochSecond(ZoneOffset offset)

参数:此方法接受参数offset,即区域偏移。


返回值:此方法返回long,它是自1970-01-01T00:00:00Z的纪元以来的秒数,可能为负数。

以下示例程序旨在说明toEpochSecond()方法:

示例1:

// Java program to demonstrate 
// ChronoLocalDateTime.toEpochSecond() method 
  
import java.time.*; 
import java.time.chrono.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create ChronoLocalDateTime object 
        ChronoLocalDateTime time 
            = LocalDateTime 
                  .parse("2019-12-31T19:15:30"); 
  
        // print ChronoLocalDateTime 
        System.out.println("ChronoLocalDateTime: "
                           + time); 
  
        // create ZoneId 
        ZoneOffset zone = ZoneOffset.of("Z"); 
  
        // print ZoneId 
        System.out.println("Passed ZoneOffset: "
                           + zone); 
  
        // print result 
        System.out.println("Epoch Second: "
                           + time.toEpochSecond(zone)); 
    } 
}
输出:
ChronoLocalDateTime: 2019-12-31T19:15:30
Passed ZoneOffset: Z
Epoch Second: 1577819730

示例2:

// Java program to demonstrate 
// ChronoLocalDateTime.toEpochSecond() method 
  
import java.time.*; 
import java.time.chrono.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create ChronoLocalDateTime object 
        ChronoLocalDateTime time 
            = LocalDateTime.parse( 
                "2018-10-25T23:12:31.123"); 
  
        // print ChronoLocalDateTime 
        System.out.println("ChronoLocalDateTime: "
                           + time); 
  
        // create ZoneId 
        ZoneOffset zone = ZoneOffset.of("Z"); 
  
        // print ZoneId 
        System.out.println("Passed ZoneOffset: "
                           + zone); 
  
        // print result 
        System.out.println("Epoch Second: "
                           + time.toEpochSecond(zone)); 
    } 
}
输出:
ChronoLocalDateTime: 2018-10-25T23:12:31.123
Passed ZoneOffset: Z
Epoch Second: 1540509151

参考: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoLocalDateTime.html#toEpochSecond-java.time.ZoneOffset-



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注:本文由纯净天空筛选整理自srinam大神的英文原创作品 ChronoLocalDateTime toEpochSecond() method in Java with Examples。非经特殊声明,原始代码版权归原作者所有,本译文的传播和使用请遵循“署名-相同方式共享 4.0 国际 (CC BY-SA 4.0)”协议。