Mybatis返回map集合

<resultMap id="pieMap"   type="HashMap">  
    <result property="value" column="VALUE" />  
    <result property="name" column="NAME" />  
</resultMap>

<select id="queryPieParam" parameterType="String" resultMap="pieMap">
    SELECT
    　　PLAT_NAME NAME,
        <if test='_parameter == "总量"'>
            AMOUNT VALUE
        </if>
        <if test='_parameter == "总额"'>
            TOTALS VALUE
        </if>
    FROM
        DOMAIN_PLAT_DEAL_PIE
    ORDER BY
        <if test='_parameter  == "总量"'>
            AMOUNT
        </if>
        <if test='_parameter  == "总额"'>
            TOTALS
        </if>
    ASC
</select>