2025年如何使用Java获取当前时间戳[通俗易懂]

编程汇总 • 2025-03-13 21:51 • 阅读 15

要获取Java中的当前时间戳：

Timestamp timestamp = new Timestamp(System.currentTimeMillis());

//2016-11-16 06:43:19.77

这是两个Java示例，向您展示如何获取Java中的当前时间戳。（使用Java 8更新）

1. java.sql.Timestamp

获得当前java.sql.Timestamp两种方法

TimeStampExample.java

package com.mkyong.date;



import java.sql.Timestamp;

import java.text.SimpleDateFormat;

import java.util.Date;



public class TimeStampExample {



    private static final SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss");



    public static void main(String[] args) {



        //method 1

        Timestamp timestamp = new Timestamp(System.currentTimeMillis());

        System.out.println(timestamp);



        //method 2 - via Date

        Date date = new Date();

        System.out.println(new Timestamp(date.getTime()));



        //return number of milliseconds since January 1, 1970, 00:00:00 GMT

        System.out.println(timestamp.getTime());



        //format timestamp

        System.out.println(sdf.format(timestamp));

        

    }



}

输出量

2016-11-16 06:43:19.77

2016-11-16 06:43:19.769

1479249799770

2016.11.16.06.43.19

2. java.time.Instant

在Java 8中，可以将java.sql.Timestamp转换为新的java.time.Instant

InstantExample.java

package com.mkyong.date;



import java.sql.Timestamp;

import java.time.Instant;



public class InstantExample {

    

    public static void main(String[] args) {



        Timestamp timestamp = new Timestamp(System.currentTimeMillis());

        System.out.println(timestamp);



        //return number of milliseconds since January 1, 1970, 00:00:00 GMT

        System.out.println(timestamp.getTime());



        // Convert timestamp to instant

        Instant instant = timestamp.toInstant();

        System.out.println(instant);



        //return number of milliseconds since the epoch of 1970-01-01T00:00:00Z

        System.out.println(instant.toEpochMilli());



        // Convert instant to timestamp

        Timestamp tsFromInstant = Timestamp.from(instant);

        System.out.println(tsFromInstant.getTime());



    }



}

输出量

2016-11-16 06:55:40.11

1479250540110

2016-11-15T22:55:40.110Z

1479250540110

1479250540110

参考文献

java.sql.Timestamp JavaDoc

java.time.Instant JavaDoc

翻译自: https://mkyong.com/java/how-to-get-current-timestamps-in-java/

2025年如何使用Java获取当前时间戳[通俗易懂]

1. java.sql.Timestamp

2. java.time.Instant

参考文献

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