None.

It is now possible for @ConfigurationProperties-annotated types to refer to types that are located in a different module. To source the metadata for those module, you should add the annotation processor (if necessary) and flag the type with @ConfigurationPRopertiesSource.

See the reference documentation for more details.

Spring Boot 4.0.0-M1 moves to new versions of several Spring projects:

• …​

Numerous third-party dependencies have also been updated, some of the more noteworthy of which are the following:

• …​

Apart from the changes listed above, there have also been lots of minor tweaks and improvements including:

• …​