mybatis参数类型为map

<select id="getAjList" parameterType="java.util.Map" resultMap="BaseResultMap">
</select>


dao：

public List<SpAjjbxx> getAjList(Map<Object,String> map);

service：

Map<Object, String> map = new HashMap<Object, String>(); 
map.put("1", 1);
map.put("start", start.toString());
map.put("pageSize", pageSize.toString());
List<SpAjjbxx> list = spAjjbxxDao.getAjList(map);