Web应用程序 - 限制对上载文件的访问

I have a problem. I am developing a web application and will be uploaded files for the staff (ie: resume, criminal record check, etc). These files get a name that includes the time, name of staff and type of file similar to: John_Doe_Resume_12-12-12-16:36:23.PDF. So all the files will be in a directory, so this file could be accessed directly by inputting the file path into the browser.I have a problem. I am developing a web applica