How was I supposed to know that from your first post? Please take a moment and review our FAQ,
HowToAskQuestionsOnJavaRanch. The better question you ask, the more help we can give.
As for your question, I had a similar requirement so I created an upload directory to store all uploaded files, then made a
servlet which would read directly from the file system. Be aware that some servers are secured so they cannot access files outside the deploy directory (
Tomcat on Ubuntu comes to mind) and
you should scrub the context given so it does not contain file path operators (allowing a path like "/" or ".." could expose configuration files or other sensitive resources).