如何在JPA中创建sql？

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import java.util.List;

public class UserRepository {

    @PersistenceContext
    private EntityManager entityManager;

    public List<User> findUsersByNativeQuery() {
        String sql = "SELECT * FROM users WHERE age > :age";
        Query query = entityManager.createNativeQuery(sql, User.class);
        query.setParameter("age", 25);
        return query.getResultList();
    }

    public void updateUserAgeNative(int userId, int newAge) {
        String sql = "UPDATE users SET age = :newAge WHERE id = :userId";
        Query query = entityManager.createNativeQuery(sql);
        query.setParameter("newAge", newAge);
        query.setParameter("userId", userId);
        query.executeUpdate();
    }
}