A classic Cart (shoppingcart) examples of code, it is worth studying

ShoppingCart
............\.classpath
............\.mymetadata
............\.project
............\src
............\...\com
............\...\...\jpioneer
............\...\...\........\application
............\...\...\........\...........\book
............\...\...\........\...........\....\dao
............\...\...\........\...........\....\...\BookDAO.java
............\...\...\........\...........\....\...\impl
............\...\...\........\...........\....\...\....\BookDaoImpl.java
............\...\...\........\...........\....\domain
............\...\...\........\...........\....\......\Book.java
............\...\...\........\...........\....\service
............\...\...\........\...........\....\.......\BookService.java
............\...\...\........\...........\....\.......\impl
............\...\...\........\...........\....\.......\....\BookServiceImpl.java
............\...\...\........\...........\....\servlet
............\...\...\........\...........\....\.......\EditBookServlet.java
............\...\...\........\...........\....\.......\ListBooksServlet.java
............\...\...\........\...........\....\test
............\...\...\........\...........\....\....\TestBook.java
............\...\...\........\...........\filter
............\...\...\........\...........\......\CharactorEncodingFilter.java
............\...\...\........\...........\......\SecurityFilter.java
............\...\...\........\...........\product
............\...\...\........\...........\.......\dao
............\...\...\........\...........\.......\...\impl
............\...\...\........\...........\.......\...\....\ProductDaoImpl.java
............\...\...\........\...........\.......\...\ProductDao.java
............\...\...\........\...........\.......\domain
............\...\...\........\...........\.......\......\Product.java
............\...\...\........\...........\.......\service
............\...\...\........\...........\.......\.......\impl
............\...\...\........\...........\.......\.......\....\ProductServiceImpl.java
............\...\...\........\...........\.......\.......\ProductService.java
............\...\...\........\...........\.......\servlet
............\...\...\........\...........\.......\.......\ListProductsServlet.java
............\...\...\........\...........\.......\test
............\...\...\........\...........\.......\....\TestProduct.java
............\...\...\........\...........\shoppingcart
............\...\...\........\...........\............\domain
............\...\...\........\...........\............\......\ShoppingCartItem.java
............\...\...\........\...........\............\service
............\...\...\........\...........\............\.......\impl
............\...\...\........\...........\............\.......\....\ShoppingCartServiceImpl.java
............\...\...\........\...........\............\.......\ShoppingCartService.java
............\...\...\........\...........\............\servlet
............\...\...\........\...........\............\.......\AddCartServlet.java
............\...\...\........\...........\............\.......\DealAccountServlet.java
............\...\...\........\...........\............\.......\DelCartServlet.java
............\...\...\........\...........\............\.......\EditCartServlet.java
............\...\...\........\...........\............\.......\ShowShoppingCart.java
............\...\...\........\...........\............\TestTime.java
............\...\...\........\...........\user
............\...\...\........\...........\....\dao
............\...\...\........\...........\....\...\impl
............\...\...\........\...........\....\...\....\UserDaoImpl.java
............\...\...\........\...........\....\...\UserDao.java
............\...\...\........\...........\....\domain
............\...\...\........\...........\....\......\User.java
............\...\...\........\...........\....\service
............\...\...\........\...........\....\.......\impl
............\...\...\........\...........\....\.......\....\UserServiceImpl.java
............\...\...\........\....

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