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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
2016.11.16.06.43.192. 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
翻译自: https://mkyong.com/java/how-to-get-current-timestamps-in-java/
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