mybatis 批量操作

MyBatis中批量插入

方法一：

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

<selectKey keyProperty="fetchTime" order="BEFORE"

resultType="java.lang.String">

SELECT CURRENT_TIMESTAMP()

</selectKey>

insert into kangaiduoyaodian ( depart1, depart2, product_name,

generic_name, img, product_specification, unit,

approval_certificate, manufacturer, marketPrice, vipPrice,

website, fetch_time, productdesc ) values

<foreach collection="list" item="item" index="index"

separator=",">

( #{item.depart1}, #{item.depart2}, #{item.productName},

#{item.genericName}, #{item.img},

#{item.productSpecification}, #{item.unit},

#{item.approvalCertificate}, #{item.manufacturer},

#{item.marketprice}, #{item.vipprice}, #{item.website},

#{fetchTime}, #{item.productdesc} )

</foreach>

</insert>

方法二：

<insert id="batchInsertB2B" parameterType="ArrayList">

insert into xxxxtable(hkgs,hkgsjsda,office,asdf,ddd,ffff,supfullName,classtype,agent_type,remark)

<foreach collection="list" item="item" index="index" separator="union all">

select #{item.hkgs,jdbcType=VARCHAR},

#{item.hkgsjsda,jdbcType=VARCHAR},

#{item.office,jdbcType=VARCHAR},

#{item.asdf,jdbcType=VARCHAR},

#{item.ddd,jdbcType=VARCHAR},

#{item.ffff,jdbcType=VARCHAR},

#{item.supfullName,jdbcType=VARCHAR},0,0,

#{item.remark,jdbcType=VARCHAR} from dual

</foreach>

</insert>

可以考虑用union all来实现批量插入。

例如：

insert into XX_TABLE(XX,XX,XX)select 'xx','xx','xx' union all select 'xx','xx','xx' union all select 'xx','xx','xx' ...

先拼装好语句再动态传入insert into XX_TABLE(XX,XX,XX)后面部分

MyBatis中批量删除

<!-- 通过主键集合批量删除记录 -->

<delete id="batchRemoveUserByPks" parameterType="java.util.List">

DELETE FROM LD_USER WHERE ID in

<foreach item="item" index="index" collection="list" open="(" separator="," close=")">

#{item}

</foreach>

</delete>

MyBatis中in子句

mybatis
in 参数 使用方法

1.只有一个参数

参数的类型要声明为List或Array

Sql配置如下：

<select id="selectProduct" resultMap="Map">

SELECT *

FROM PRODUCT

WHERE PRODUCTNO IN

<foreach item="productNo" index="index" collection="参数的类型List或array">

#{productNo}

</foreach>

</select>

2.多个参数

首先要将多个参数写入同一个map，将map作为一个参数传入mapper

Sql配置如下：

<select id="selectProduct" resultMap="Map">

SELECT *

FROM PRODUCT

WHERE PRODUCTNO IN

<foreach item="productNo" index="index" collection="map中集合参数的名称">

#{productNo}

</foreach>

</select>

MyBatis批量修改

<update id="updateOrders" parameterType="java.util.List">

update orders set state = '0' where no in

<foreach collection="list" item="nos" open="(" separator="," close=")">

#{nos}

</foreach>

</update>