Java JPA通过hql语句查询数据

import javax.persistence.PersistenceContext;
import javax.persistence.Query;

public class StudentServiceImpl {

    @PersistenceContext
    private EntityManager entityManager;

    public void getByHql() {
        String hql = "select * from Student";
        Query query = entityManager.createQuery(hql);
        List<Student> list = query.getResultList();
    }

    /**
      *查Map结果集
    */
    public void getMapByHql() {
        String hql = "select new Map(s.name as name, s.age as age) from Student s";
        Query query = entityManager.createQuery(hql);
        List<Map<String, Object>> list = query.getResultList();
    }
}