JavaBeansDataExchange could not instantiate result class. Cause: java.lang.InstantiationException:

<select id="getselectedcommondityinfos" parameterClass="map" resultClass="map">
SELECT *
FROM commondity_info c
WHERE comstate_id != 4
<isNotNull property="comIds" prepend=" and com_id in ">
<iterate property="comIds" conjunction="," close=")" open="(">
#comIds[]#
</iterate>
</isNotNull>
</select>在执行的时候报错：Cause: java.lang.RuntimeException: JavaBeansDataExchange could not instantiate result class. Cause: java.lang.InstantiationException: java.util.Map; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException:注意：Map作为resultClass時，必須指定具体的实现类，比如java.util.HashMap,否则会报错Caused by: java.lang.RuntimeException: JavaBeansDataExchange could not instantiate result class. Cause: java.lang.InstantiationException: java.util.Map解决办法：<select id="getselectedcommondityinfos" parameterClass="map" resultClass="java.util.HashMap">
SELECT *
FROM commondity_info c
WHERE comstate_id != 4
<isNotNull property="comIds" prepend=" and com_id in ">
<iterate property="comIds" conjunction="," close=")" open="(">
#comIds[]#
</iterate>
</isNotNull>
</select>