<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
groovy
implementation 'javax.validation:validation-api:2.0.1.Final'
public class User {
@NotBlank
private String name;
@Min(18)
private int age;
\t
}
public void processUser(User user) {
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
Set<ConstraintViolation<User>> violations = validator.validate(user);
if (!violations.isEmpty()) {
throw new IllegalArgumentException("Invalid user: " + violations);
}
}
@Target({ ElementType.FIELD, ElementType.PARAMETER })
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = PhoneNumberValidator.class)
public @interface PhoneNumber {
String message() default "Invalid phone number";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
public class Contact {
@PhoneNumber
private String phoneNumber;
\t
}
