Finding problem in UploadServlet

[Delf-Lee]

In the doPost method, first time reading request parameter, the server was stoped.

no matter what is parameter, only "first".

[Delf-Lee]

The cause of this problem was HttpServletRequest object. Tomcat create this object and pass to us as parameter to HttpServlet it. When we extract using getParameter() or getPart(), HttpServletRequest object receive data "internally". so it was look stuck. but that was "just invisible".