The registration of auto configurations have been moved from spring.factories (under the org.springframework.boot.autoconfigure.EnableAutoConfiguration key) to a new file named META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports, where each line contains the fully qualified name of an auto configuration class.

The registration of management context configurations have been moved from spring.factories (under the org.springframework.boot.actuate.autoconfigure.web.ManagementContextConfiguration key) to a new file named META-INF/spring/org.springframework.boot.actuate.autoconfigure.web.ManagementContextConfiguration.imports, where each line contains the fully qualified name of a management context configuration class.

The @Configuration annotations of the auto configuration classes (that are listed in the new META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports files, see above) have been replaced with the new @AutoConfiguration annotation.