java8 lambda表达式递归查询属性结构

最新推荐文章于 2025-04-20 16:37:37 发布

sjh0822

最新推荐文章于 2025-04-20 16:37:37 发布

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文章标签： stream lambda java

本文链接：https://blog.youkuaiyun.com/weixin_44942563/article/details/114965423

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 @Override
    public List<DeviceGroupVo> getDeviceGroup() {
        //查询全部
        List<DeviceGroupVo> deviceGroup = deviceGroupDao.getDeviceGroup();
        List<DeviceGroupVo> collect = deviceGroup.stream()
                .filter(item -> item.getParentGroupCode().toString().equals("0"))
                .map(deviceGroupVo -> {
                    deviceGroupVo.setChilds(getDeviceGroupChilds(deviceGroupVo,deviceGroup));
                    return deviceGroupVo;
                }).collect(Collectors.toList());
         return  collect;
    }
    /***
     * Desc:  递归下一级子菜单
     * @param root
     * @param all
     * @return {@link List< DeviceGroupVo>}
     * @author sheng jia hao
     * @date 2021/3/17 13:35
     */
    public List<DeviceGroupVo> getDeviceGroupChilds(DeviceGroupVo root,List<DeviceGroupVo> all) {
        List<DeviceGroupVo> collect = all.stream()
                .filter(item -> item.getParentGroupCode().equals(root.getGroupCode()))
                .map(deviceGroupVo -> {
                    deviceGroupVo.setChilds(getDeviceGroupChilds(deviceGroupVo, all));
                    return deviceGroupVo;
                }).collect(Collectors.toList());
        return collect;
    }