JPA使用本机或命名查询返回HashMap<Integer、ArrayList<Integer>>

String sql = "SELECT column1, column2 FROM table_name";
Query query = entityManager.createNativeQuery(sql);
List<Object[]> resultList = query.getResultList();

HashMap<Integer, ArrayList<Integer>> resultMap = new HashMap<>();
for (Object[] result : resultList) {
    Integer key = (Integer) result[0];
    Integer value = (Integer) result[1];

    if (resultMap.containsKey(key)) {
        resultMap.get(key).add(value);
    } else {
        ArrayList<Integer> list = new ArrayList<>();
        list.add(value);
        resultMap.put(key, list);
    }
}

@Entity
@NamedQuery(name = "Entity.findData", query = "SELECT e.column1, e.column2 FROM Entity e")
public class Entity {
    // ...
}

TypedQuery<Object[]> query = entityManager.createNamedQuery("Entity.findData", Object[].class);
List<Object[]> resultList = query.getResultList();

HashMap<Integer, ArrayList<Integer>> resultMap = new HashMap<>();
for (Object[] result : resultList) {
    Integer key = (Integer) result[0];
    Integer value = (Integer) result[1];

    if (resultMap.containsKey(key)) {
        resultMap.get(key).add(value);
    } else {
        ArrayList<Integer> list = new ArrayList<>();
        list.add(value);
        resultMap.put(key, list);
    }
}