自己写的servlet程序，用以管理搜集的url站点 ShowUrlList.java : 显示链接列表 AddUrl.java ：增加链接 DBAdaptor.java ：管理数据库连接 HtmlGenerator.java ：辅助类 SearchUrl.java ：搜索链接-Servlet own written procedures for the administration to collect the url site ShowUrlList.java: display a list of links AddUrl.java: increasing links DBAdaptor.java: the management of database connection HtmlGenerator.java: auxiliary category SearchUrl.java: Search Links