Como armazenar dados em SERVLETS
De Basef
Remember that you can store data in lots of different places in a servlet. To wit:
- Local variables - for loop iterators, result sets, and so forth
- Request attributes - for data that must be passed to other servlets invoked with the RequestDispatcher
- Session attributes - persists for all future requests from the current user only
- Instance variables - for data that persists for the life of the servlet, shared with all concurrent users
- Static variables - for data that persists for the life of the application, shared with all concurrent users -- including any other servlet instances that were instantiated with different init parameters
- Context attributes - for data that must persist for the life of the application, and be shared with all other servlets
This extract is from http://www.jguru.com/faq/view.jsp?EID=416009
