Java7&8 时区方面的处理

红太狼 2021-06-24 16:09 301阅读 0赞

Java7：

Calendar cd = Calendar.getInstance();  
     SimpleDateFormat sdf = new SimpleDateFormat("EEE d MMM yyyy HH:mm:ss 'GMT'", Locale.US);  
     sdf.setTimeZone(TimeZone.getTimeZone("GMT")); // 设置时区为GMT  
        String str = sdf.format(cd.getTime());  
        System.out.println(str);

Java8：

Java 8不仅分离了日期和时间，也把时区分离出来了。现在有一系列单独的类如ZoneId来处理特定时区，ZoneDateTime类来表示某时区下的时间。这在Java 8以前都是 GregorianCalendar类来做的。

LocalDateTime.now(ZoneId.of("GMT")).
                    format(DateTimeFormatter.ofPattern("MM/dd/yyyy hh:mm:ss a", Locale.US))

// Date and time with timezone in Java 8
    ZoneId america = ZoneId.of("America/New_York");
    LocalDateTime localtDateAndTime = LocalDateTime.now();
    ZonedDateTime dateAndTimeInNewYork  = ZonedDateTime.of(localtDateAndTime, america );
    System.out.println("Current date and time in a particular timezone : " + dateAndTimeInNewYork);
     
    Output :
    Current date and time in a particular timezone : 2014-01-14T16:33:33.373-05:00[America/New_York]

时区信息字段参考：[https://www.cnblogs.com/softidea/p/8612287.html][https_www.cnblogs.com_softidea_p_8612287.html]

[https_www.cnblogs.com_softidea_p_8612287.html]: https://www.cnblogs.com/softidea/p/8612287.html