将unix时间转换为工作日 [英] Convert unix time to week day

问题描述

如何将时间从Unix时间戳转换为工作日？例如，我要将 1493193408 转换为星期三。

How can I convert time from unix timestamp to week day? For example, I want to convert 1493193408 to Wednesday.

我尝试了上面的代码，但始终显示星期日 ..

I tryed code above, but It always shows Sunday..

SimpleDateFormat sdf = new SimpleDateFormat("EEEE");
Date dateFormat = new java.util.Date(1493193408);
String weekday = sdf.format(dateFormat );

推荐答案

使用java.time

其他答案使用麻烦的旧日期时间类（现在已被遗留）取代了java.time类。

Using java.time

The other Answers use the troublesome old date-time classes, now legacy, supplanted by the java.time classes.

时区至关重要确定日期，从而获得星期几。

Time zone is crucial in determining a date, and therefore getting a day-of-week.

从UTC 1970年以来的秒数中获取即时信息。应用时区以获取ZonedDateTime。从那里提取DayOfWeek枚举对象。要求该对象自动本地化以生成其名称的字符串。

Get an Instant from your count of while seconds since the epoch of 1970 in UTC. Apply a time zone to get a ZonedDateTime. From there extract a DayOfWeek enumerate object. Ask that object to automatically localize to generate a string of its name.

Instant.ofEpochSecond( 1_493_193_408L )
        .atZone( ZoneId.of( "America/Montreal" ))
        .getDayOfWeek()
        .getDisplayName( TextStyle.FULL , Locale.US )

对于Android，请参阅ThreeTenABP项目以获取大多数java.time功能的后向端口。

For Android, see the ThreeTenABP project for a back-port of most of the java.time functionality.

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