Can you elaborate on the below,
" there is a really big form so user has an option of filling it up later
while he is trying to fill it up ,data which he filled earlier should be prepopulated "
How many Screens (i.e.,
JSP) you provide for user to enter the data ?
Is it like a WIZARD type ?
i.e., SCREEN 1 --> SCREEN 2 -->...... --> FINAL SCREEN with SUBMIT button ??