网络爬虫spider，用户需要输入搜索起始URL(必须以http://开头)，搜索关键词，搜索深度。显示器上显示的时访问URL获得的新URL

关键词可以是一种文件的扩展名等，而具有关键词的URL则保存在D盘根目录下，可以更改

-Web crawler spider, the user needs to enter the search base URL (must start with http://), search keywords, search depth. Displayed on the monitor when you access the URL URL

Keywords can be a file extension, and keywords, the URL is saved under the root directory in D, you can change