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This article introduces the knowledge of "what are the three exception capture handling methods of @ Validated and @ Valid". Many people will encounter this dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Catalogue

@ Validated and @ Valid exception catch

There are three kinds of anomalies

The difference between @ Valid and @ Validated

Annotation position

There are three types of exceptions caught by @ Validated and @ Valid exceptions

BindException: form submission is valid and will be invalid for submission in json format

MethodArgumentNotValidException: the preceding paragraph is valid in json format

ConstraintViolationException: add @ RequestParam to the parameter or @ NotBlank @ NotNull to the parameter

The difference between @ Valid and @ Validated

@ Valid is used when using Hibernate validation

@ Validated is used only by the Spring Validator verification mechanism.

Description: java's JSR303 declares interfaces such as @ Valid, while Hibernate-validator implements it

@ Validation encapsulates @ Valid twice, and there is no difference in use, but there are differences in grouping, annotation location, nesting verification and other functions. This article mainly describes these situations.

Annotation position

Validated: used on types, methods, and method parameters. But cannot be used for member attributes (field)

Valid: can be used on methods, constructors, method parameters, and member properties (field)

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