优质代码二

    @Override
    public void deleteRelation(AttrGroupRelationVo vos) {
        //将我们接受数据的对象转为一个 entity
        List<AttrAttrgroupRelationEntity> list = Arrays.asList(vos).stream().map((item) -> {
            AttrAttrgroupRelationEntity entity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, entity);
            return entity;
        }).collect(Collectors.toList());
        //批量的删关联表中的数据
        attrAttrgroupRelationDao.removeBatchRelation(list);
    }