Spring Boot User Validation - spring-boot

Question

I need a custom validator in Spring Boot(version 2.7.x). My User class is defined as:
class User{
private String email;
private String phone;
private String name;
private String address;
private String city;
private String country;
private String postalCode;
//getters and setters
}
I'm trying to validate the following requirements:
Either phone or email or a combination of (name+address+city+country+postalCode) is mandatory
If (name+address+city+country+postalCode) is present, they should be not null.
Please help with your suggestions as to how do I go about in implementing it.

Answer 1

you can use JSR-303 valiation implementation that hibernate-validator
and it is conventient to use annotation for valiate which
is in package javax.validation.constraints
here is code sample that
you can use #NotNull annotation above Field that mark the field should be not null
entity
class User{
private String email;
private String phone;
private String name;
#NotNull(message = "address should be not null")
private String address;
private String city;
private String country;
private String postalCode;
//getters and setters
}
validatorUtil
#Slf4j
public class ValidatorUtil {
static Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
public static <T> Set<ConstraintViolation<T>> validateOne(T t , Class<?>... group) {
Set<ConstraintViolation<T>> validateResult = validator.validate(t,group);
return validateResult;
}
}
valiatorTest
#Slf4j
public class ValiatorTest {
#Test
public void vailator(){
User accountInfo = new User();
Set<ConstraintViolation<User>> constraintViolations = ValidatorUtil.validateOne(accountInfo);
Assertions.assertTrue(CollectionUtil.isNotEmpty(constraintViolations));
}
}
if you build project with maven ，add hibernate-validator dependency to pom
<properties>
<hibernate.validator.version>6.0.14.Final</hibernate.validator.version>
</properties>
<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator</artifactId>
<version>${hibernate.validator.version}</version>
</dependency>
if you want learn more , please accroding to this article Which #NotNull Java annotation should I use?!