Java日期,使用特定的日光模式进行渲染 [英] Java Date, render with specific daylight mode
问题描述
我在夏季夏令时期间有一个Java Date
。例如:
I have a Java Date
that is from this summer during daylight savings time. For example:
2009年6月1日上午06:00 PDT
Jun 01, 2009 06:00 AM PDT
我的问题是,如何将此日期显示为本地时区和当前夏令时(在我的情况下是太平洋标准时间)?
My question is, how do I display this date as my local time zone and current daylight savings mode (in my case Pacific Standard Time)?
2009年6月1日05:00 AM PST
Jun 01, 2009 05:00 AM PST
Java的 Date.toString()
和 SimpleDateFormat
以原始夏令时模式显示日期。示例:
Java's Date.toString()
and SimpleDateFormat
displays the date in the original daylight savings mode. Example:
System.out.println(new Date(1243861200000L));
输出:
Mon Jun 01 06:00:00 PDT 2009
Mon Jun 01 06:00:00 PDT 2009
DateFormat dateFormat = new SimpleDateFormat("MMM dd, yyyy hh:mm aa zzz");
dateFormat.setTimeZone(TimeZone.getTimeZone("PST"));
System.out.println(dateFormat.format(new Date(1243861200000L)));
输出:
2009年6月1日上午06:00 PDT
Jun 01, 2009 06:00 AM PDT
我真正想看到的是PST(上午5:00)相当于上午6:00 PDT)。有没有办法强制使用另一个夏令时模式?
What I really want to see is 5:00 AM PST (which is equivalent to 6:00 AM PDT). Is there a way to force it to use another daylight savings mode?
跟进:顺便提一句,这是Windows XP的行为。在6月1日上午5点,冬天期间将在6月1日上午6点创建一个文件(由Explorer,Command Prompt等)。
Follow up: By the way, this is the Windows XP behavior. A file created on June 1, 6 AM will be seen (by Explorer, Command Prompt, etc) as June 1, 5 AM during the winter.
推荐答案
PST / PDT全年变化。 Java尝试确定在给定日期中哪个有效。随着法律和地区的变化,这件事情明显的改变了。你可以使用绝对时区吗?指定GMT的偏移量将在同一年。
PST/PDT change throughout the year. Java attempts to determine which one is in affect on a given date. This things obviously change as the laws and regions change. Can you use an absolute time zone? Specifying the offset in GMT will be the same year around.
DateFormat dateFormat = new SimpleDateFormat("MMM dd, yyyy hh:mm aa zzz");
dateFormat.setTimeZone(TimeZone.getTimeZone("GMT-07:00"));
System.out.println(dateFormat.format(new Date(1243861200000L)));
Jun 01, 2009 06:00 AM GMT-07:00
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