Refractored a bit.
Project 3 is done.
- PlaceOrder.jsp maintains precomputed tables.
- Confirmation.jsp hide credit card # input if no products.
- currentOrders.jspf -> displayCart.jspf
- In many places, now id and stateId are stored as int in session rather
than String.
- Some PreparedStatement are changed to Statement
- Changed Constant.U_STATE from "state" to "ustate" to distinguish from
other database name.