Customizing Hibernate validator Constraints

Defining annotations

Implement a constraint that can only enter a specified state

ImportJavax.validation.Constraint;ImportJavax.validation.Payload;Importjava.lang.annotation.Documented;Importjava.lang.annotation.Retention;ImportJava.lang.annotation.Target;Import StaticJava.lang.annotation.ElementType.ANNOTATION_TYPE;Import StaticJava.lang.annotation.ElementType.FIELD;Import StaticJava.lang.annotation.ElementType.METHOD;Import StaticJava.lang.annotation.RetentionPolicy.RUNTIME; @Target ({METHOD, FIELD, Annotation_type}) @Retention (RUNTIME) @ Constraint (Validatedby= Statusvalidator.class) @Documented Public@Interfacevalidstatus {String message ()default"Status Error"; Class<?>[] Groups ()default {}; Class<?extendsPayload>[] Payload ()default {}; /*** Valid set of status values, default {*/    int[] Value ()default{};}

Defining a validation class

ImportJavax.validation.ConstraintValidator;ImportJavax.validation.ConstraintValidatorContext;Importjava.util.Arrays;Importjava.util.List;/*** Verify whether the state belongs to the specified state set (the type of the generic object specified after Constraintvalidator is the type of the annotation class and the annotation comment field <validstatus, integer>)*/ Public classStatusvalidatorImplementsConstraintvalidator<validstatus, integer> {    Privateinteger[] Validstatus; @Override Public voidInitialize (Validstatus validstatus) {int[] INTs =Validstatus.value (); intn =ints.length; integer[] Integers=NewInteger[n];  for(inti = 0; I < n; i++) {Integers[i]=Ints[i]; }         This. Validstatus =integers; } @Override Public BooleanIsValid (Integer N, Constraintvalidatorcontext constraintvalidatorcontext) {List<Integer> status =arrays.aslist (validstatus); if(Status.contains (n)) {return true; }        return false; }}

Used in programs

 Public classquerydto {@ValidStatus @notnullPrivateInteger type;//... Omit n lines of code} @RestController @requestmapping (value= "XXX") Public classDemocontroller {//... Omit n lines of code@PostMapping (value = "/testurl")     PublicResponse<resultvo>getxxxlist (@RequestBody @Valid querydto dto) {//... Omit n lines of code    }    }

You can also use this:

Validatorfactory factory = validation.builddefaultvalidatorfactory ();         = factory.getvalidator ();        Set<ConstraintViolation<QueryDTO>> constraintviolations =            validator.validate (querydto);

Customizing Hibernate validator Constraints