Overview

This is a follow-up to #30185 and #33151.

When applications run on JDK 23+, Spring Framework should support lenient parsing for date/time formats that include the time period (AM or PM) -- for example, by matching leniently against a narrow non-breaking space (NNBSP) or a standard space between the hour and AM/PM declaration.

Related Resources

• https://jdk.java.net/20/release-notes#JDK-8284840
• https://unicode-org.atlassian.net/browse/CLDR-14032
• https://bugs.openjdk.org/browse/JDK-8223587
• https://bugs.openjdk.org/browse/JDK-8284840
• https://bugs.openjdk.org/browse/JDK-8297316
• https://bugs.openjdk.org/browse/JDK-8304925
• https://bugs.openjdk.org/browse/JDK-8324665

Related Issues

• 30185

• 33144

• 33151

Comment From: sormuras

"Loose matching of space separators in the lenient date/time parsing mode" has been integrated into Java 23-ea+9:

• https://github.com/openjdk/jdk/commit/96eb0390d69ed2e0c3e59f77fb65fbb79615a11c

See JDK-8324665 for more details.

Comment From: snicoll

We should move this to 6.1.x otherwise we can't build against Java 23. It's unfortunate we've been hiding this problem for so long. COMPAT is now deprecated and we should stop using it ASAP.

Comment From: snicoll

I've moved this issue to a task as I don't understand how that is an enhancement if it only impacts our own tests.

Comment From: sbrannen

After experimenting with the available options in this feature branch, we decided not to provide built-in support for lenient parsing of date/time formats in conjunction with @DateTimeFormat.

Instead, we will document the options that Spring users have, and I am therefore closing this as superseded by:

• 33151