@Entity
public class Person
{
    @OneToMany(mappedBy = "person",fetch = FetchType.LAZY,cascade = CascadeType.ALL)
    private List<Address> addresses = new ArrayList<Address>();
}

@Entity
public class Address
{
    @ManyToOne(fetch = FetchType.EAGER,cascade = {CascadeType.PERSIST,CascadeType.MERGE},optional = true)
    @JoinColumn(name = "PERSON_ID",nullable = true)
    private Person person;
}

@Service("addressService")
@Repository
@Transactional
class AddressService
{
     @Autowired
    AddressRepository addressRepository;
    
   @Transactional(readOnly = true)
    public List<Address> findAllAddresses
    {
      return addressRepository.findAll();
    }
}

 @Service("personService")
 @Repository
 @Transactional
  class PersonService
  {
     @Autowired
     PersonRepository personRepository;

     public Person save(String name, List<Address> addresses)
     {
           Person person = new Person();
           person.setName(name);
           person.setAddresses(addresses);
           personRepository.save(person) 
     }

   } 

personServise.save(person) 

 person.setAddresses(addresses)

personServise.save(person)