parseDate cannot parse ISO8601 dates produced by FastDateFormat
---------------------------------------------------------------
Key: LANG-530
URL: https://issues.apache.org/jira/browse/LANG-530
Project: Commons Lang
Issue Type: Bug
Affects Versions: 2.4
Reporter: Aaron Zeckoski
I cannot see why this is failing but here is my code:
Date parseDate(String dateStr) {
Date d = null;
if (dateStr != null && ! "".equals(dateStr)) {
try {
// try to parse the date from ISO8601, general
formats, and RFC-2822
d = DateUtils.parseDate(dateStr, new String[] {
DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.getPattern()
});
} catch (ParseException e) {
// nothing to do
log.info("Failed to parse: " + dateStr + ":" + e, e);
d = null;
}
}
return d;
}
The string I am sending in to that method was generated like this:
String isoDateStr = DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.format(date);
The exception is:
2009-09-03 13:29:37,644 [399355...@qtp3-2] INFO
search.SOLRSearchService - Failed to parse:
2009-09-03T13:29:30+01:00:java.text.ParseException: Unable to parse
the date: 2009-09-03T13:29:30+01:00
java.text.ParseException: Unable to parse the date: 2009-09-03T13:29:30+01:00
at org.apache.commons.lang.time.DateUtils.parseDate(DateUtils.java:285)
at
org.steeple.impl.search.SOLRSearchService.parseDate(SOLRSearchService.java:412)
at
org.steeple.impl.search.SOLRSearchService.execute(SOLRSearchService.java:311)
....
Issue seems to be that DateFormatUtils.ISO_DATETIME objects are
FastDateFormat objects; whereas parseDate uses SimpleDateFormat. The
former supports "ZZ" whereas the latter does not.
Java 1.4 (not sure about later) had 'Z' which meant +0100.
FastDateFormat adds 'ZZ' to support the ISO standard of +01:00. ie)
presumably your actual value is +0100+0100.
Solution is probably to have parseDate use FastDateFormat, though
there will always be the issue that getPattern from FastDateFormat may
not work with SimpleDateFormat.
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