使用mybatis 对 oracle数据批量插入、更新

正确的mybatis的mapper的sql配置如下：

<insert id="addList" parameterType="java.util.List" useGeneratedKeys="false">

        INSERT ALL

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

        INTO T_APPLAUD

        (

            ID,

            USER_ID,

            BUSINESS_TYPE,

            PRODUCT_ID,

            CREATE_TIME

        ) VALUES

        (

            #{item.id, jdbcType=NUMERIC},

            #{item.userId, jdbcType=VARCHAR},

            #{item.businessType, jdbcType=VARCHAR},

            #{item.productId, jdbcType=VARCHAR},

            #{item.createdTime, jdbcType=NUMERIC} 

        )

        </foreach>

        SELECT 1 FROM DUAL
    </insert>

另外一种方法是 insert into table(...) (select ... from dual) union all (select ... from dual)

<insert id="addList" parameterType="java.util.List" useGeneratedKeys="false">

        INSERT INTO T_APPLAUD

        (

            ID,

            USER_ID,

            BUSINESS_TYPE,

            PRODUCT_ID,

            CREATE_TIME

        )

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

        (

            SELECT 

                #{item.id},

                #{item.userId},

                #{item.businessType},

                #{item.productId},

                #{item.createdTime} 

            FROM DUAL

        )

        </foreach>

    </insert>

传入的参数只要是list类型的参数就行了。。。。。。。。。。。。。。
1、批量插入

<insert id="insertBatch" parameterType="java.util.List">
INSERT INTO T_CITY_INDEX(
id,city_code
)
select SEQ_CITY_INDEX.NEXTVAL,cd.* from(
<foreach collection="list" item="item" index="index"  close=")" open="(" separator="union">
select
#{item.cityCode,jdbcType=VARCHAR},
#{item.cityName,jdbcType=VARCHAR}
from dual
</foreach>
) cd
</insert>

2、批量跟新

<update id="updateBatch"  parameterType="java.util.List">
<foreach collection="list" item="item" index="index" open="begin" close=";end;" separator=";">
update T_CITY_INDEX t
set
t.city_name= #{item.cityName,jdbcType=VARCHAR} ,
t.district_name= #{item.districtName,jdbcType=VARCHAR} ,
where t.id = #{item.id,jdbcType=NUMERIC}
</foreach>
</update>

https://www.cnblogs.com/feixian/p/5960111.html https://www.cnblogs.com/xunux/p/4882761.html