List list = (List) sqlSession.selectList(sql);
// Cannot cast from List MyBatis 未指定 resultType 時，預設回傳 List（每筆為 Map 或陣列），Java 型別擦除導致無法直接轉型。
<select id="findAll" resultType="com.example.Professor">
SELECT * FROM professor
</select>List raw = sqlSession.selectList(sql);
List list = new ArrayList<>();
for (Object obj : raw) {
if (obj instanceof Professor) list.add((Professor) obj);
else if (obj instanceof Map) list.add(mapToProfessor((Map) obj));
} @Select("SELECT * FROM professor")
@Results(id="profMap", value={ @Result(property="id", column="id"), ... })
List findAll(); 
