connection pool in mvc2 architecture

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JavaSE

J2EE

hi friends.............pls help me
iam designing a website using j2ee(mvc2 arch.)
iam using servlet as controller and all database connections iam implemented in java beans.....
but i have to use connection pooling but dont know where to initialize
the pool of connections in servlet or in javabean..........
iam already having different javabeans implementing database connections
pls help me......................