直接上代码

 void batchUpdateSpecificationId(@Param("infos") List<GoodsInfo> infos);

<update id="batchUpdateSpecificationId">
        update goods_info
        set specification_id =
        <foreach collection="infos" item="info" open="(case " close=" else null end)">
            when id = #{info.id} then #{info.specificationId}
        </foreach>
        ,
        specification_name =
        <foreach collection="infos" item="info" open="(case " close=" else null end)">
            when id = #{info.id} then #{info.specificationName}
        </foreach>
        ,
        min_real_price =
        <foreach collection="infos" item="info" open="(case " close=" else null end)">
            when id = #{info.id} then #{info.minRealPrice}
        </foreach>
        ,
        min_line_price =
        <foreach collection="infos" item="info" open="(case " close=" else null end)">
            when id = #{info.id} then #{info.minLinePrice}
        </foreach>
        where id in
        <foreach collection="infos" item="info" open="(" close=")" separator=",">
            ${info.id}
        </foreach>
    </update>

运行的ｓｑｌ

UPDATE goods_info 
SET specification_id = ( CASE WHEN id = 373 THEN '702' WHEN id = 374 THEN '704' ELSE NULL END ),
specification_name = ( CASE WHEN id = 373 THEN '十全冻干桶 | 400g' WHEN id = 374 THEN '经典混合 | 60支' ELSE NULL END ),
min_real_price = ( CASE WHEN id = 373 THEN 0.01 WHEN id = 374 THEN 0.01 ELSE NULL END ),
min_line_price = ( CASE WHEN id = 373 THEN 130.0 WHEN id = 374 THEN 88.0 ELSE NULL END ) 
WHERE
	id IN ( 373, 374 )

这辈子坚持与不坚持都不可怕，怕的是独自走在坚持的道路上。。