Spring Boot Validation Annotations Cheat Sheet - From the Differences Between @NotNull/@NotEmpty/@NotBlank to Custom Messages
A cheat sheet of the standard constraint annotations available in Spring Boot 3.x (Jakarta Bean Validation 3.0), listing each one's target types, behavior on null, and default message. Covers the differences between @NotNull/@NotEmpty/@NotBlank, @Size vs @Length, choosing between numeric, date-time, and string constraints, Hibernate Validator-specific constraints, and overriding messages with localized text via ValidationMessages.properties or messages.properties.