mybatis ~ 批量更新（sql循环）update foreach

情况1

<update id=""  parameterType="">
    update tb_thread set isDelete=0
    where threadId in ( 
    <foreach collection="list" item="item" index="index" open="" close="" separator=",">
            #{item.threadId}
    </foreach>
            )     
  </update>

情况2

数据源后加：&allowMultiQueries=true

 <update id="updateJdzClassifyDataGroupId"  parameterType="com.macro.mall.project.classify.domain.JdzClassifyData">
        <foreach collection="list" item="item" index="index">
            update jdz_classify_data
            set group_id=#{item.groupId}
            where id=#{item.id};
        </foreach>
    </update>