java新手问题，这段小代码是什么意思，起什么作用，希望说详细些，谢谢

public List getListBySQL(final String queryString) {
try {
List list = getHibernateTemplate().executeFind(new HibernateCallback() {
public Object doInHibernate(Session session)
throws HibernateException, SQLException {
SQLQuery query = session.createSQLQuery(queryString);
List list = query.list();
try {
releaseSession(session);
} finally {
return list;
}
}
});
return list;
} catch (RuntimeException re) {
throw re;
}
}