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reading/writing to a file from JSP

Sam Tilley
Ranch Hand

Joined: Dec 05, 2001
Posts: 160
I need to create a JSP page that contains 200 checkboxes each worth an amount of money. The idea is that someone will buy a checkbox providing sponsorship for a charity event(they are buying the number of lengths swum in a pool). My task is to create a table of checkboxes which is the easy part, but then i need to grey over the check box once someone has used it, so need to write this to something so that every time someone opens it up it shows which ones have been taken.
The one thing is that i may not have a database to write the info to so have been trying to write it to a text file instead, however i have been having some problems getting the data out of the file and into my JSP using
Is this the best idea to do this or is there another way to store info for a webapplication that is failsafe.

Sam Tilley SCJP, SCWCD
William Brogden
Author and all-around good cowpoke

Joined: Mar 22, 2000
Posts: 13037
Reading and writing in the same file is likely to be a disaster.
You should create an object that holds all of the data representing the checkboxes. Keep it in memory and write it out every time it gets changed.
Harry D'Souza

Joined: Dec 28, 2002
Posts: 28
I am not a PRO with JSP but this would be my first guess too -- I would want to write to a text file . But instead of having a BufferedReader and a BufferedWriter refering to the same file I would rather use RandomAccessFile which implements the standard input and the output methods.

Harry D'Souza<br />SJCP 1.4 , SCWCD
I agree. Here's the link:
subject: reading/writing to a file from JSP
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