Server.MapPath(“./”) 返回路径为：E:\wwwroot\company\news
Server.MapPath(“/”) 返回路径为：E:\wwwroot
Server.MapPath(“../”) 返回路径为：E:\wwwroot\company
Server.MapPath(“~/”) 返回路径为：E:\wwwroot\company
server.MapPath(request.ServerVariables(“Path_Info”))
Request.ServerVariables(“Path_Translated”)
上面两种方式返回路径为 D:\wwwroot\company\news\show.asp
