使用spring data jpa更新多对多表，不兼容的类型

@Entity
public class EntityA {
    @Id
    private Long id;
    
    @ManyToMany
    @JoinTable(name = "a_b",
            joinColumns = @JoinColumn(name = "a_id"),
            inverseJoinColumns = @JoinColumn(name = "b_id"))
    private List<EntityB> entityBs;
    
    // getters and setters
}

@Entity
public class EntityB {
    @Id
    private Long id;
    
    @ManyToMany(mappedBy = "entityBs")
    private List<EntityA> entityAs;
    
    // getters and setters
}

@Repository
public interface EntityARepository extends JpaRepository<EntityA, Long> {
}

@Repository
public interface EntityBRepository extends JpaRepository<EntityB, Long> {
}

@Service
public class EntityService {
    @Autowired
    private EntityARepository entityARepository;
    
    @Autowired
    private EntityBRepository entityBRepository;
    
    @Transactional
    public void updateEntities(Long entityId, List<Long> entityBIds) {
        EntityA entityA = entityARepository.findById(entityId).orElse(null);
        if (entityA != null) {
            List<EntityB> entityBs = entityBRepository.findAllById(entityBIds);
            entityA.setEntityBs(entityBs);
            entityARepository.save(entityA);
        }
    }
}