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  • 【mybatis】mybatis中批量插入 批量更新 batch 进行insert 和 update,或者切割LIst进行批量操作

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    分别展示 mybatis 批量新增  和 批量更新   的操作:

    controller层:

    goodsService.batchInsert(insertGoodsList);
    
    goodsService.batchUpdate(updateGoodsList);

    service层:

    切割List的方法【https://www.cnblogs.com/sxdcgaq8080/p/9376947.html】【建议分批次处理,每次处理1000条】【实际根据每条数据的大小,自行划分】

      @Override
        @Transactional
        public int batchInsert(List<Goods> list) {
            int a = 0;
    
            List<List<Goods>> goodsAllList = ListUtils.splitListBycapacity(list,1000);
            for (List<Goods> goodsList : goodsAllList) {
                a += mapper.batchInsert(goodsList);
            }
    
            return a;
        }
    
        @Override
        @Transactional
        public int batchUpdate(List<Goods> list) {
            int a = 0;
    
            List<List<Goods>> goodsAllList = ListUtils.splitListBycapacity(list,1000);
            Map<String,Object> map = new HashMap<>();
            for (List<Goods> goodsList : goodsAllList) {
                map.put("list",goodsList);
                a += mapper.batchUpdate(map);
            }
    
            return a;
        }

    Mapper.java层

        int batchInsert(List<Goods> list);
    
        int batchUpdate(Map<String,Object> map);

    Mapper.xml层

    【注意,batchUpdate的原理,是循环拼接sql,一次连接数据库,执行多条update语句】

    <insert id="batchInsert">
            INSERT INTO goods
    
            (create_date,update_date,create_id,update_id,enabled,
            tenement_id,uid,name,py_all,py_head,
            outer_id,outer_code,mnemonic_code,del_flag,enabled_flag,
            goods_type_uid,url,bar_cide,sale_price,integral,
            scan_name,brand_uid,en_name)
    
            VALUES
    
            <foreach collection="list" item="item" separator=",">
                (#{item.createDate},#{item.updateDate},#{item.createId},#{item.updateId},#{item.enabled},
                #{item.tenementId},#{item.uid},#{item.name},#{item.pyAll},#{item.pyHead},
                #{item.outerId},#{item.outerCode},#{item.mnemonicCode},#{item.delFlag},#{item.enabledFlag},
                #{item.goodsTypeUid},#{item.url},#{item.barCide},#{item.salePrice},#{item.integral},
                #{item.scanName},#{item.brandUid},#{item.enName})
            </foreach>
        </insert>
    
        <update id="batchUpdate" parameterType="java.util.Map">
            <foreach collection="list" separator=";" item="goods">
                update
                    goods 
                SET
                    update_date = #{goods.updateDate},
                    update_id = #{goods.updateId},
                    enabled = #{goods.enabled},
                    name = #{goods.name},
                    py_all = #{goods.pyAll},
                    py_head = #{goods.pyHead},
                    outer_code = #{goods.outerCode},
                    mnemonic_code = #{goods.mnemonicCode},
                    del_flag = #{goods.delFlag},
                    enabled_flag = #{goods.enabledFlag},
                    goods_type_uid = #{goods.goodsTypeUid},
                    url = #{goods.url},
                    bar_cide = #{goods.barCide},
                    sale_price = #{goods.salePrice},
                    integral = #{goods.integral},
                    scan_name = #{goods.scanName},
                    brand_uid = #{goods.brandUid},
                    en_name = #{goods.enName}
                where
                    outer_id = #{goods.outerId}
                and
                    tenement_id = #{goods.tenementId}
    
            </foreach>
        </update>

    最后如果,批量插入可以成功,但是批量更新失败,可以参考:https://www.cnblogs.com/sxdcgaq8080/p/10565023.html

    最后需要注意的是,如果解决了批量更新问题后,还想按照【https://www.cnblogs.com/sxdcgaq8080/p/9100178.html】打印sql,就失效了,sql就不会打印出来了。!!!!

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  • 原文地址:https://www.cnblogs.com/sxdcgaq8080/p/9494336.html
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