Java LocalDate toEpochSecond()用法及代码示例

LocalDate类的toEpochSecond()方法用于将此LocalDate转换为自1970-01-01T00：00：00Z以来的秒数。该方法将此本地日期与指定的时间和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:

public long toEpochSecond(LocalTime time,
                          ZoneOffset offset)

参数：此方法接受两个参数time和offset，它们是本地时间和区域偏移。

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 
// LocalDate.toEpochSecond() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a LocalDate object 
        LocalDate localD 
            = LocalDate.parse("2018-12-06"); 
  
        // print LocalDate 
        System.out.println("LocalDate: "
                           + localD); 
  
        // create a LocalTime object 
        LocalTime time 
            = LocalTime.parse("20:12:32"); 
  
        // print Instant 
        System.out.println("Passed LocalTime: "
                           + time); 
  
        // create ZoneId 
        ZoneOffset zone = ZoneOffset.of("Z"); 
  
        // print ZoneId 
        System.out.println("Passed ZoneOffset: "
                           + zone); 
  
        // print result 
        System.out.println("Epoch Second: "
                           + localD.toEpochSecond(time, zone)); 
    } 
}

输出：

LocalDate: 2018-12-06
Passed LocalTime: 20:12:32
Passed ZoneOffset: Z
Epoch Second: 1544127152

示例2:

// Java program to demonstrate 
// LocalDate.toEpochSecond() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a LocalDate object 
        LocalDate localD 
            = LocalDate.parse("2019-01-01"); 
  
        // print LocalDate 
        System.out.println("LocalDate: "
                           + localD); 
  
        // create a LocalTime object 
        LocalTime time 
            = LocalTime.parse("00:00:00"); 
  
        // print Instant 
        System.out.println("Passed LocalTime: "
                           + time); 
  
        // create ZoneId 
        ZoneOffset zone = ZoneOffset.of("Z"); 
  
        // print ZoneId 
        System.out.println("Passed ZoneOffset: "
                           + zone); 
  
        // print result 
        System.out.println("Epoch Second: "
                           + localD.toEpochSecond(time, zone)); 
    } 
}

输出：

LocalDate: 2019-01-01
Passed LocalTime: 00:00
Passed ZoneOffset: Z
Epoch Second: 1546300800

参考： https://docs.oracle.com/javase/10/docs/api/java/time/LocalDate.html#toEpochSecond(java.time.LocalTime, java.time.ZoneOffset)

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注：本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 LocalDate toEpochSecond() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。