c92e043bbc
This commit introduces a notion of different styles for the formatting of Duration. The `@DurationFormat` annotation is added to ease selection of a style, which are represented as DurationFormat.Style enum, as well as a supported time unit represented as DurationFormat.Unit enum. DurationFormatter has been retroffited to take such a Style, optionally, at construction. The default is still the JDK style a.k.a. ISO-8601. This introduces the new SIMPLE style which uses a single number + a short human-readable suffix. For instance "-3ms" or "2h". This has the same semantics as the DurationStyle in Spring Boot and is intended as a replacement for that feature, providing access to the feature to projects that only depend on Spring Framework. Finally, the `@Scheduled` annotation is improved by adding detection of the style and parsing for the String versions of initial delay, fixed delay and fixed rate. See gh-22013 See gh-22474 Closes gh-30396
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