A simple online store system. Realization of shopping carts. Design an Item class, including: a commodity like a number, a small meter (2) design a servlet class Start the session to take to see if there Hashmap class, which is a shopping cart The structure of the HashMap class Key value Goods the id the Item class Remove the HashMap from the session: A. Look at the session there, remove, did not create 2. HashMap key id of the commodity, if the second purchase, the number 1, does not create a new HashMap class Jump page-> show cart in detail

网上购物系统4\mysql-connector-java-5.0.6-bin.jar
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