You'll need to use the UTC zone when parsing:
formatter.withZone(DateTimeZone.UTC).parse();
I know its a pain. JSR-310 will be better.
Stephen
2009/3/6 Michel Tremblay <santar...@gmail.com>:
> I came across a strange behaviour in the DateTimeFormatter`s parsing
> methods. Depending on the time zone the date will either parse file or
> generate a illegal instant through a IllegalArgumentException. Now frrom
> what I understand this means that the date, through manipulations ends up
> being impossible (like 2:30 the morning where the time changes in US)
> However, the date I ask to be parsed does not have time information nor does
> the pattern, so I would not expect that I get impossible date-time like
> this.
>
> Here is an example that explains it :
>
> If I run this code in Canada (set time to EST) all is good and I get the
> correct answer.
>
> public class App
> {
> public static void main(String[] args)
> {
> System.out.println("Hello World!");
> ReadableInstant ins = null;
> DateTimeFormatter formatter = null;
> formatter = DateTimeFormat.forPattern("yyyyMMdd");
> formatter =
> formatter.withZone(DateTimeZone.forTimeZone(TimeZone.getTimeZone("EST")));
>
> ins = formatter.parseDateTime("19880410");
>
> System.out.println(formatter.print(ins));
> }
> }
>
> result is as expected :
>
> Hello World!
> 19880410
>
> however... If I move to Asia time (Asia/Shanghai) the situation changes
> completely :
>
> public class App
> {
> public static void main(String[] args)
> {
> System.out.println("Hello World!");
> ReadableInstant ins = null;
> DateTimeFormatter formatter = null;
> formatter = DateTimeFormat.forPattern("yyyyMMdd");
>
> formatter =
> formatter.withZone(DateTimeZone.forTimeZone(TimeZone.getTimeZone("Asia/Shanghai")));
>
> ins = formatter.parseDateTime("19880410");
>
> System.out.println(formatter.print(ins));
> }
> }
>
> and the result now becomes
>
> Hello World!
> Exception in thread "main" java.lang.IllegalArgumentException: Cannot parse
> "19880410": Illegal instant due to time zone offset transition
> (Asia/Shanghai)
> at
> org.joda.time.format.DateTimeParserBucket.computeMillis(DateTimeParserBucket.java:336)
> at
> org.joda.time.format.DateTimeFormatter.parseDateTime(DateTimeFormatter.java:662)
> at foo.App.main(App.java:28)
>
> Notice that only the timezone has changed. This is a bit problematic as the
> class where it is used cannot be given a set timezone and we relying on the
> sytem OS to provide the information. I could force a timezone but that
> would defeat the purpose.
>
> I frankly do not see how someone`s birthday could become an impossible time
> just by changing the timezone from which you read the information. also, it
> is somewhat uncommon that someone would list the exact time with TZ of his
> birthday !! :-)
>
> This is why I think I am looking at a bug somewhere in the stack of
> JodaTime, could someone confirm this behaviour and help me find a solution ?
>
> great many thanks.
>
> Santaroga
>
>
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