第五章 mybatis批量更新update

update t set fileld=‘xx‘ where id in (id1,id2,...,idn)

<update id="updateBatch" parameterType="Map">
        update t_name
        set name = #{name,jdbcType=VARCHAR}
        where autoid in 
        (
        <foreach collection="list" item="item" separator=",">
            #{item.id,jdbcType=BIGINT}
        </foreach>
        )
    </update>

void updateBatch(@Param("list") List<User> list, @Param("name") String name);