017.二级缓存（2）

1.good.xml(flushCache="true"在sql执行完之后强制清空缓存)

 <!--flushCache="true"在sql执行完之后强制清空缓存-->
    <select id="selectGoodsMap" resultType="java.util.LinkedHashMap" flushCache="true">
        select g.* , c.category_name,'1' as test from t_goods g , t_category c
        where g.category_id = c.category_id
    </select>