<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.2.Final</version>
</dependency>
implementation 'org.hibernate.validator:hibernate-validator:6.0.2.Final'
public class User {
private String username;
private String password;
}
public class RegisterService {
private Validator validator;
public RegisterService() {
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
validator = factory.getValidator();
}
public void register(User user) {
Set<ConstraintViolation<User>> violations = validator.validate(user);
if (!violations.isEmpty()) {
for (ConstraintViolation<User> violation : violations) {
System.out.println(violation.getMessage());
}
} else {
}
}
}
