java - Particular uploading issue via JSP -

hi creating file upload , download form via jsp. working fine, can upload small files, can create , fetch download particular file , delete file if required.

now problem is, suppose 2 users using app. user uploaded file named file.txt. sometime later user b uploaded file named file.txt. previous file overwrite. dont want popup box alert user b file of name exists.

instead want folder created each user have files stored on server side in named folder.

savefile="c:/temp/"+savefile; 

i need modify line of code think.

task completed. ok task done. guy had exact same task me.

how create folder in tomcat webserver using java program?

thanks guys inputs.