●インターフェースに側
@Repository
public interface MyDataRepository extends JpaRepository<MyData, Long> {

 public List<MyData> findByName(String name);
 public List<MyData> findByMail(String mail);
 public List<MyData> findByAge(int age);
 public List<MyData> findByNameLikeOrMailLike(String name, String mail);
 public List<MyData> findByAgeGreaterThanOrAgeLessThan(Integer age0, Integer age1);
}