One cautionary observation about the use of shared SimpleDateFormat
instances: they are not threadsafe.
While it seems like a good idea to create these for various formats and
hold them as class static or instance members, you need to do something to
prevent threading issues.
I have run into problems using SimpleDateFormat in this way in a
multiprocessor environment, which lead to using the following simple
subclass instead:
public class SynchronizedSimpleDateFormat extends SimpleDateFormat {
public SynchronizedSimpleDateFormat() {
super();
}
public SynchronizedSimpleDateFormat(String arg0) {
super(arg0);
}
public SynchronizedSimpleDateFormat(String arg0, DateFormatSymbols arg1)
{
super(arg0, arg1);
}
public SynchronizedSimpleDateFormat(String arg0, Locale arg1) {
super(arg0, arg1);
}
// Note that we only need to synchronize this format method, as the
others all use this one internally
public synchronized StringBuffer format(Date arg0, StringBuffer arg1,
FieldPosition arg2) {
return super.format(arg0, arg1, arg2);
}
public synchronized Date parse(String arg0, ParsePosition arg1) {
return super.parse(arg0, arg1);
}
public synchronized Date parse(String arg0) throws ParseException {
return super.parse(arg0);
}
}
Please respond to "Tomcat Users List" <users@tomcat.apache.org>
To: Tomcat Users List <users@tomcat.apache.org>
cc:
Subject: Re: [OT] Parsing xs:dateTime values
Hi,
You don't need regexp. Do you mean something like:
private static final String ISO8601_DATEFORMAT =
"yyyy-MM-dd'T'HH:mm:ss";
private static final java.text.SimpleDateFormat ISO8601 = new
java.text.SimpleDateFormat(
ISO8601_DATEFORMAT, java.util.Locale.US);
public static final Date getDateFromIso8601(final String iso8601)
throws ParseException {
return ISO8601.parse(iso8601);
}
best,
-Rob
On Thu, 2008-05-15 at 12:00 -0400, Christopher Schultz wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> All,
>
> I posted this on the commons-user mailing list, but I'm not getting any
> love. I'm cross-posting to see if anyone on this list might have any
> good ideas.
>
> | Hi, I'm looking for an implementation of a String->Date converter for
> | xs:dateTime, which has an odd format. It's not directly supportable by
> | java.text.SimpleDateFormat and looks like a regular expression is the
> | only way to go.
> |
> | Does anyone have an implementation they'd care to share, or any tips
in
> | particular? I'd be glad to share whatever I come up with if there
isn't
> | anything already out there.
>
> My existing implementation uses regular expressions, which seems a bit
> overkill.
>
> Thanks,
> - -chris
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