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Support fallback parsing patterns in @DateTimeFormat

See original GitHub issue

member sound opened SPR-15736 and commented

It would be nice if one could set multiple formats for:

@DateTimeFormat(pattern = "yyyy-MM-dd")
@DateTimeFormat(pattern = "yyyyMMdd")
@DateTimeFormat(pattern = "yyyy.MM.dd")
private LocalDate date;

https://docs.oracle.com/javase/tutorial/java/annotations/repeating.html

No further details from SPR-15736

Issue Analytics

State:
Created 6 years ago
Comments:7 (4 by maintainers)

Top GitHub Comments

2reactions

sbrannencommented, Mar 2, 2021

Current work on this can be viewed in my feature branch: https://github.com/spring-projects/spring-framework/compare/master...sbrannen:issues/gh-20292-DateTimeFormat-patterns

The current approach is to introduce a new String[] fallbackPatterns() attribute that allows the user to specify a primary pattern for printing and parsing (via the existing style, iso, and pattern attributes) with multiple fallback patterns for parsing if the primary parsing pattern fails.

An example taken from the test suite:

@DateTimeFormat(pattern = "yyyy-MM-dd", fallbackPatterns = { "M/d/yy", "yyyyMMdd", "yyyy.MM.dd" })
private Date dateWithFallbackPatterns;

0reactions

membersoundcommented, Feb 26, 2021

That’s really a great idea. Well done!

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