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An annotation may include the following information: A brief summary of the source. The source's strengths and weaknesses. Its conclusions. Why the source is relevant in your field of study. Its relationships to other studies in the field. An evaluation of the research methodology (if applicable)

The @Validated annotation is a class-level annotation that we can use to tell Spring to validate parameters that are passed into a method of the annotated class.

The @Required annotation in spring is a method-level annotation used in the setter method of a bean property and therefore making the setter-injection compulsory.

When Spring Boot finds an argument annotated with @Valid, it automatically bootstraps the default JSR 380 implementation ? Hibernate Validator ? and validates the argument. When the target argument fails to pass the validation, Spring Boot throws a MethodArgumentNotValidException exception.

The @Required annotation applies to bean property setter methods and it indicates that the affected bean property must be populated in XML configuration file at configuration time. Otherwise, the container throws a BeanInitializationException exception. Following is an example to show the use of @Required annotation.

@Validated annotation is a class-level annotation that we can use to tell Spring to validate parameters that are passed into a method of the annotated class. @Valid annotation on method parameters and fields to tell Spring that we want a method parameter or field to be validated.

The @Valid annotation ensures that the entity class is validated at runtime. Additional user-defined constraints can also trigger validation of an entity. @Path("/createUser") public class CreateUserResource { ...

The @Valid annotation ensures the validation of the whole object. Importantly, it performs the validation of the whole object graph. However, this creates issues for scenarios needing only partial validation. On the other hand, we can use @Validated for group validation, including the above partial validation.