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https://issues.apache.org/jira/browse/LANG-1432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16793930#comment-16793930
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Philip Hodges commented on LANG-1432:
-------------------------------------
Precondition (implicit in submitter's example):
* default timezone China (which has an ambiguous abbreviation CST)
Expected by submitter:
* FastDateTime.parse interprets a CST date as China Standard Time (UTC+8)
like SimpleDateFormat.parse apparently does.
Found:
* FastDateTime.parse interprets a CST date as Central Standard Time (UTC-6).
What might be best for an ambiguous timezone like CST:
* choose the most likely interpretation if the parser's timezone is in the
same region?
* choose a consistent interpretation if the parser's timezone is in another
region?
* throw an exception because the parse is ambiguous?
* make it depend on whether the parse is strict or lenient?
* use whatever java.time does since Java 8 instead?
> FastDateFormat doesn't parse time string with timezone correctly
> ----------------------------------------------------------------
>
> Key: LANG-1432
> URL: https://issues.apache.org/jira/browse/LANG-1432
> Project: Commons Lang
> Issue Type: Bug
> Components: lang.time.*
> Affects Versions: 3.8.1
> Environment: jdk 1.8
> Reporter: Simon Xianyu
> Priority: Major
>
> FastDateFormat doesn't parse the pattern correctly :
> "EEE MMM dd HH:mm:ss zzz yyyy"
> The test code is as following:
>
> {code:java}
> // code placeholder
> public class TestFastDateFormat {
> public static void main(String[] args) throws ParseException {
> Date d = new Date();
> String dstr = d.toString();
> System.out.println(dstr);
> String pattern = "EEE MMM dd HH:mm:ss zzz yyyy";
> FastDateFormat fdf = FastDateFormat.getInstance(pattern,
> Locale.US);
> Date d1 = fdf.parse(dstr);
> System.out.println(d1);
> // Use SimpleDateFormat to parse string
> SimpleDateFormat sdf = new SimpleDateFormat(pattern);
> Date d2 = sdf.parse(dstr);
> System.out.println(d2);
> }
> }
> {code}
> The test result example:
> Tue Feb 12 16:07:53 CST 2019 /// this is origin result
> Wed Feb 13 06:07:53 CST 2019 /// this is result of FastDateTime.parse()
> Tue Feb 12 16:07:53 CST 2019 /// this is result of
> SimpleDateFormat.parse()
>
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