我有一个日期列表作为字符串，即：
28/10/2012 00:00
28/10/2012 01:00
28/10/2012 02:00
28/10/2012 02:00
28/10/2012 03:00
（同一小时两次是因为DST）
而且我需要确保在每个日期之间恰好有一个小时。
这里的问题是，第一个28/10/2012 02:00是CEST，而第二个是CET。区分它们是容易的部分，因为第一个是CEST，第二个是CET。困难的部分是如何为
SimpleDateFormat（或另一个日期解析类）指定字符串代表CEST / CET时间，以便获得正确的Date对象？提前致谢！
最佳答案
考虑下面的例子
我认为它有您的答案convert String to Date with SimpleDateFormat considering CET CEST
public class DatesAndTimesStackOverflow {
final static SimpleDateFormat sdf;
final static TimeZone tz;
static {
tz = TimeZone.getTimeZone( "Europe/Paris" );
sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss zzz");
sdf.setTimeZone(tz);
}
public static void main(String[] args) {
// october clock change should be the following:
outputDateInfo("2012-10-28 02:00:00 CEST");
outputDateInfo("2012-10-28 02:30:00 CEST");
outputDateInfo("2012-10-28 02:00:00 CET");
outputDateInfo("2012-10-28 02:30:00 CET");
outputDateInfo("2012-10-28 03:00:00 CET");
outputDateInfo("2012-10-28 03:30:00 CET");
outputDateInfo("2012-10-28 04:00:00 CET");
}
private static void outputDateInfo(String theDate) {
try {
output("------------------------------------------------------------------------------");
Date d = sdf.parse(theDate);
Calendar c = GregorianCalendar.getInstance(tz);
c.setTimeInMillis(d.getTime());
TimeZone tzCal = c.getTimeZone();
output("String: " + theDate);
output("");
output("Date: " + d); // toString uses current system TimeZone
output("Date Millis: " + d.getTime());
output("Cal Millis: " + c.getTimeInMillis());
output("Cal To Date Millis: " + c.getTime().getTime());
output("Cal TimeZone Name: " + tzCal.getDisplayName());
output("Cal TimeZone ID: " + tzCal.getID());
output("Cal TimeZone DST Name: " + tzCal.getDisplayName(true, TimeZone.SHORT));
output("Cal TimeZone Standard Name: " + tzCal.getDisplayName(false, TimeZone.SHORT));
output("In DayLight: " + tzCal.inDaylightTime(d));
output("");
output("Day Of Month: " + c.get(Calendar.DAY_OF_MONTH));
output("Month Of Year: " + c.get(Calendar.MONTH));
output("Year: " + c.get(Calendar.YEAR));
output("Hour Of Day: " + c.get(Calendar.HOUR_OF_DAY));
output("Minute: " + c.get(Calendar.MINUTE));
output("Second: " + c.get(Calendar.SECOND));
// check to see if this converts back to correct string
String reformat = sdf.format(c.getTime());
if( reformat.equals(theDate) ) {
output("ReConvert: " + reformat + " OK");
} else {
output("ReConvert: " + reformat + " <-------- Error. The converted date is different");
}
} catch (ParseException ex) {
output("Cannot parse this date");
}
}
private static void output(String message) {
System.out.println(message);
}
}