Are you sure you don't mean IoC?
No.
The question here is ' Is connection pooling a cross-cutting functionality which can be mdularized? '
If yes it can be developed using AOP just like transaction,logging, ect (i may be wrong, just a guess).
There is something called the Spring DBCP connection pooling which spring uses for connection pooling.
I cant seem to find information about implimenting it in AOP.