1.批量新增

<insert id="insertBatch" parameterType="java.util.List">

　　insert into th_shopping_Cart

　　(itemCode, userId, number)

　　values

　　<foreach collection="list" item="item" index="index" separator=",">

　　　　(#{item.itemCode},#{item.userId},#{item.number})

　　</foreach>

</insert>

2.批量修改

<update id="updateBatch" parameterType="java.util.List">
    <foreach collection="list" item="item" index="index" open="" close="" separator=";">
        update th_shopping_Cart 
        <set>
            number=${item.number}
        </set>
        where userId='${item.userId}' and itemCode='${item.itemCode}'
    </foreach>
  </update>

3.批量删除

<delete id="deleteBatch" parameterType="java.util.List">
    delete from th_shopping_Cart
    where userId =#{userId}

    <if test="null!=list and list.size > 0">
        and itemCode in

         <foreach collection="list" item="item" index="index" open="(" close=")" separator=",">
            #{item.itemCode}
    </foreach>
    </if>
  </delete>