Mybatis查找返回Map,List集合类型的数据方式

public List<Employee> getEmpListByEmail(String email);

@MapKey("id")
public Map<Integer,Employee> getEmpMapByEmail(String email);

public Map<String, Object> getEmpByEmail(String email);

<select id="selectUser"  resultType="java.util.HashMap">  
</select>  

Map<String,Object> selectUser(); 

<select id="selectUser"  resultType="java.lang.String">  
</select>  

List<String> selectUser(); 

<select id="selectUser"  resultType="java.util.HashMap">  
</select>  

List<Map<String,Object>> selectUser ();

<resultMap id="baseResult" type="com.XXX.BscntrUnitInfoResult(对应对象)">
  <result column="unit_id" property="unitId" jdbcType="INTEGER" (字段映射关系)/>
  <result column="unit_name" property="unitName"
   jdbcType="VARCHAR" />
  <result column="unit_type" property="unitType"
   jdbcType="INTEGER" />
  <result column="super_unit_id" property="superUnitId"
   jdbcType="INTEGER" />
  <result column="GIS_start_x" property="gisStartX"
   jdbcType="FLOAT" />
  <result column="ext_top" property="extTop" jdbcType="DOUBLE" />
</resultMap>
<select id="getBscntrUnitInfoListByName" resultMap="baseResult">
  
</select>

public List<BscntrUnitInfoResult> getBscntrUnitInfoListByName();