Mybatis 批量更新

    <!-- 批量更新第一种方法，通过接收传进来的参数list进行循环着组装sql 后两种写法效率以此降低耗时长 -->
    <update id="updateBatchStock" >
        update oms_good_stock set bindcode=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.bindcode}
        </foreach>,
        innum=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.innum}
        </foreach>,
        sunit=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.sunit}
        </foreach>,
        pname=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.pname}
        </foreach>,
        pspec=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.pspec}
        </foreach>,
        pstyle=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.pstyle}
        </foreach>,
        proddate=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.proddate}
        </foreach>,
        ratio=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.ratio}
        </foreach>,
        goname=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.goname}
        </foreach>,
        whname=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.whname}
        </foreach>,
        expidate=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.expidate}
        </foreach>,
        create_by=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.createBy}
        </foreach>,
        create_time=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.createTime}
        </foreach>,
        update_by=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.updateBy}
        </foreach>,
        update_time=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.updateTime}
        </foreach>,
        is_push_wms=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.isPushWms}
        </foreach>,
        gocode=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.gocode}
        </foreach>,
        is_delete=
        <foreach collection="list" index="index"  separator=" " open="case id"  close="end" item="item">
            when #{item.id} then #{item.isDelete}
        </foreach>
        where id in
        <foreach collection="list" index="index" separator="," open="(" close=")" item="item">
            #{item.id}
        </foreach>
    </update>
    <!-- 批量更新第二种方法，通过接收传进来的参数list进行循环着组装sql 后两种写法效率以此降低耗时长 -->
    <update id="updateBatch" parameterType="java.util.List" >
        <foreach collection="list"  index="index"  separator=" " item="item">
            update oms_good_stock
            <set >
                <if test="item.bindcode != null  and item.bindcode != ''">
                   bindcode = #{item.bindcode},</if>
                <if test="item.innum != null ">innum = #{item.innum},</if>
                <if test="item.sunit != null  and item.sunit != ''">item.sunit = #{item.sunit},</if>
                <if test="item.pname != null  and item.pname != ''">item.pname = #{item.pname},</if>
                <if test="item.pspec != null  and item.pspec != ''">item.pspec = #{item.pspec},</if>
                <if test="item.pstyle != null  and item.pstyle != ''">item.pstyle = #{item.pstyle},</if>
                <if test="item.ratio != null and item.ratio != ''">item.ratio = #{item.ratio},</if>
                <if test="item.prodDate != null  and item.prodDate != ''">item.prod_date = #{item.prodDate},</if>
                <if test="item.goname != null  and item.goname != ''">item.goname = #{item.goname},</if>
                <if test="item.whname != null and item.whname != ''">item.whname = #{item.whname},</if>
                <if test="item.expiDate != null and item.expiDate != '' ">item.expi_date = #{item.expiDate},</if>
                <if test="item.createBy != null  and item.createBy != ''">item.create_by = #{item.createBy},</if>
                <if test="item.createTime != null ">item.create_time = #{item.createTime},</if>
                <if test="item.updateBy != null  and item.updateBy != ''">item.update_by = #{item.updateBy},</if>
                <if test="item.updateTime != null ">item.update_time = #{item.updateTime},</if>
                <if test="item.isPushWms != null  ">item.isPushWms = #{item.isPushWms},</if>
                <if test="item.isDelete != null  and item.isDelete != ''">item.is_delete = #{item.isDelete},</if>
            </set>
            where id = #{item.id}
        </foreach>
    </update>

    <!-- 批量更新第三种方法，通过 case when语句变相的进行批量更新 -->
    <update id="updateBatch1" parameterType="java.util.List" >
        update standard_relation
        <trim prefix="set" suffixOverrides=",">
            <trim prefix="standard_from_uuid =case" suffix="end,">
                <foreach collection="list" item="i" index="index">
                    <if test="i.standardFromUuid!=null">
                        when id=#{i.id} then #{i.standardFromUuid}
                    </if>
                </foreach>
            </trim>
            <trim prefix="standard_to_uuid =case" suffix="end,">
                <foreach collection="list" item="i" index="index">
                    <if test="i.standardToUuid!=null">
                        when id=#{i.id} then #{i.standardToUuid}
                    </if>
                </foreach>
            </trim>
            <trim prefix="gmt_modified =case" suffix="end,">
                <foreach collection="list" item="i" index="index">
                    <if test="i.gmtModified!=null">
                        when id=#{i.id} then #{i.gmtModified}
                    </if>
                </foreach>
            </trim>
        </trim>
        where
        <foreach collection="list" separator="or" item="i" index="index" >
            id=#{i.id}
        </foreach>
    </update>
    <!--批量更新第四种方法，用ON DUPLICATE KEY UPDATE-->
    <insert id="updateBatch2" parameterType="java.util.List">
        insert into standard_relation(id,relation_type, standard_from_uuid,
        standard_to_uuid, relation_score, stat,
        last_process_id, is_deleted, gmt_created,
        gmt_modified,relation_desc)VALUES
        <foreach collection="list" item="item" index="index" separator=",">
            (#{item.id,jdbcType=BIGINT},#{item.relationType,jdbcType=VARCHAR}, #{item.standardFromUuid,jdbcType=VARCHAR},
            #{item.standardToUuid,jdbcType=VARCHAR}, #{item.relationScore,jdbcType=DECIMAL}, #{item.stat,jdbcType=TINYINT},
            #{item.lastProcessId,jdbcType=BIGINT}, #{item.isDeleted,jdbcType=TINYINT}, #{item.gmtCreated,jdbcType=TIMESTAMP},
            #{item.gmtModified,jdbcType=TIMESTAMP},#{item.relationDesc,jdbcType=VARCHAR})
        </foreach>
        ON DUPLICATE KEY UPDATE
        id=VALUES(id),relation_type = VALUES(relation_type),standard_from_uuid = VALUES(standard_from_uuid),standard_to_uuid = VALUES(standard_to_uuid),
        relation_score = VALUES(relation_score),stat = VALUES(stat),last_process_id = VALUES(last_process_id),
        is_deleted = VALUES(is_deleted),gmt_created = VALUES(gmt_created),
        gmt_modified = VALUES(gmt_modified),relation_desc = VALUES(relation_desc)
    </insert>