December 2000
Intermediate to advanced
574 pages
17h 3m
English
Content preview from Java Server Pages
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Online Shopping
Now let’s look
at a more useful example: an online
shopping site. Besides showing you how the session and application
scopes can be used effectively in a larger
application, this example
also introduces many other useful tools. You’ll see a number of
generic custom actions you can use in your own applications, and
learn how to use the java.text.NumberFormat class
to format numbers.
The application consists of three pages. The main page lists all available products. Each product is linked to a product description page, where the product can be added to the shopping cart. A product is added to the shopping cart by a request processing page. The main page with the product list is then displayed again, but now with the current contents of the shopping cart as well, as shown in Figure 8.6.
Figure 8-6. The product list and the contents of the shopping cart
Two beans are used to keep
track of the products: the
com.ora.jsp.beans.shopping.CatalogBean
contains all available products, and the
com.ora.jsp.beans.shopping.CartBean represents one
user’s shopping cart. Each product in the catalog is
represented by a
ProductBean
.
Tables Table 8.6, Table 8.7, and Table 8.8 show all the properties for the beans.
Table 8-6. Properties for com.ora.jsp.beans.shopping.CatalogBean
|
Property Name |
Java Type |
Access |
Description |
|---|---|---|---|
productList |
com.ora.jsp.beans. shopping.ProductBean[] |
read ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.