在 Java 中获取“unixtime”
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Getting "unixtime" in Java
提问by Gary Richardson
Date.getTime() returns milliseconds since Jan 1, 1970. Unixtime is seconds since Jan 1, 1970. I don't usually code in java, but I'm working on some bug fixes. I have:
Date.getTime() 返回自 1970 年 1 月 1 日以来的毫秒数。Unixtime 是自 1970 年 1 月 1 日以来的秒数。我通常不使用 Java 编写代码，但我正在修复一些错误。我有：
Date now = new Date();
Long longTime = new Long(now.getTime()/1000);
return longTime.intValue();
Is there a better way to get unixtime in java?
有没有更好的方法在java中获得unixtime？
采纳答案by John M
Avoid the Date object creation w/ System.currentTimeMillis(). A divide by 1000 gets you to Unix epoch.
避免使用System.currentTimeMillis()创建 Date 对象。除以 1000 使您进入 Unix 时代。
As mentioned in a comment, you typically want a primitive long (lower-case-l long) not a boxed object long (capital-L Long) for the unixTime variable's type.
正如评论中提到的，对于 unixTime 变量的类型，您通常需要原始 long（小写-l long）而不是装箱对象 long（大写-L Long）。
long unixTime = System.currentTimeMillis() / 1000L;
回答by micha
Java 8 added a new API for working with dates and times. With Java 8 you can use
Java 8 添加了一个用于处理日期和时间的新 API。使用 Java 8，您可以使用
import java.time.Instant
...
long unixTimestamp = Instant.now().getEpochSecond();
Instant.now()returns an Instantthat represents the current system time. With getEpochSecond()you get the epoch seconds (unix time) from the Instant.
Instant.now()返回一个表示当前系统时间的Instant。随着getEpochSecond()您从Instant.
