Java Beans - how do we get data from a bean from a jsp when the data is entered from a POJO

Question

I want to populate data into one bean using a regular POJO. In order to get that data later, do I have to pass the reference to that bean around my code till I want to use it?

Do I save that reference to a Session object? (not sure if that even makes sense)

What is the best pattern to use for such a situation.