mybatis 批量更新

在实际的开发中, 存在一次性插入很多数据,和更新很多数据的情况;

mysql+Mybatis

一.Mybatis批量更新

<update id="batchUpdateByIds" parameterType="list">
        update crm_member
        <trim prefix="set" suffixOverrides=",">
            <trim prefix="type =case" suffix="end,">
                <foreach collection="list" item="item" index="index">
                    <if test="item.type !=null">
                        when id=#{item.id} then #{item.type}
                    </if>
                </foreach>
            </trim>
            <trim prefix="update_by =case" suffix="end,">
                <foreach collection="list" item="item" index="index">
                    <if test="item.updateBy !=null and item.updateBy != ''">
                        when id=#{item.id} then #{item.updateBy}
                    </if>
                </foreach>
            </trim>
            <trim prefix="update_time =case" suffix="end,">
                <foreach collection="list" item="item" index="index">
                    <if test="item.updateTime !=null">
                        when id=#{item.id} then #{item.updateTime}
                    </if>
                </foreach>
            </trim>
            <trim prefix="follow_status =case" suffix="end,">
                <foreach collection="list" item="item" index="index">
                    <if test="item.followStatus !=null">
                        when id=#{item.id} then #{item.followStatus}
                    </if>
                </foreach>
            </trim>
        </trim>
        where id in
        <foreach collection="list" index="index" item="item" separator="," open="(" close=")">
            #{item.id}
        </foreach>
    </update>