mybatis 查询返回Map＜String,Object＞类型

@MapKey("userId")
Map<String,UserInfo> personalInfoByUserIds(List<String> list);

<resultMap id="BaseResultMap" type="com.*.*.entity.UserInfo">
    <id column="user_id" jdbcType="VARCHAR" property="userId" />
    <result column="user_code" jdbcType="INTEGER" property="userCode" />
    <result column="user_name" jdbcType="VARCHAR" property="userName" />
    <result column="user_gender" jdbcType="INTEGER" property="userGender" />
    <result column="mobile_phone" jdbcType="VARCHAR" property="mobilePhone" />
    <result column="birthday" jdbcType="DATE" property="birthday" />
  </resultMap>
 
 
<select id="personalInfoByUserIds" resultMap="BaseResultMap">
      select * from t_user_info i where i.user_id in
      <foreach collection="list" item="item" separator="," open="(" close=")" index="index">
        #{item}
      </foreach>
</select>