Spring boot2.0 JpaRepository findOne的使用

findOne只能接受Example的参数

[code]@Autowired
private BannerItemRepository repository;

@Test
public void findOne(){
BannerItem bannerItem=new BannerItem();
bannerItem.setId(1);
Example<BannerItem> example=Example.of(bannerItem);
Optional<BannerItem> bannerItemOptional=repository.findOne(example);
if (bannerItemOptional.isPresent()){
BannerItem bannerItem1=bannerItemOptional.get();
System.out.println(bannerItem1.toString());
}else{
System.out.println("no exit");
}

}