在Spring JPA中，我们如何像ibatis一样查询XML文件或bean.xml？

@Repository
public interface UserRepository extends JpaRepository<User, Long> {

    @Query(value = "SELECT * FROM users WHERE age > :age", nativeQuery = true)
    List<User> findByAgeGreaterThan(@Param("age") int age);
}

@Entity
@NamedQueries({
    @NamedQuery(name = "User.findByAgeGreaterThan", query = "SELECT u FROM User u WHERE u.age > :age")
})
public class User {
    // ...
}

@Repository
public interface UserRepository extends JpaRepository<User, Long> {

    @Query(name = "User.findByAgeGreaterThan")
    List<User> findByAgeGreaterThan(@Param("age") int age);
}

public class UserSpecifications {

    public static Specification<User> ageGreaterThan(int age) {
        return (root, query, builder) -> builder.greaterThan(root.get("age"), age);
    }
}

@Repository
public interface UserRepository extends JpaRepository<User, Long>, JpaSpecificationExecutor<User> {

    List<User> findAll(Specification<User> spec);
}