Prentice Hall and Sun Microsystems. Personal use only; do not redistribute.
9.4 An On Line Store Using a Shopping Cart and Session Tracking
217
Listing 9.5 OrderPage.java (continued)
// customers came here via an "Update Order" button
// after changing the number of items in order.
// Note that specifying a number of 0 results
// in item being deleted from cart.
int numItems;
try {
numItems = Integer.parseInt(numItemsString);
} catch(NumberFormatException nfe) {
numItems = 1;
}
cart.setNumOrdered(itemID, numItems);
}
}
}
// Whether or not the customer changed the order, show
// order status.
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "Status of Your Order";
out.println(ServletUtilities.headWithTitle(title) +
"\n" +
"" + title + "
");
synchronized(session) {
Vector itemsOrdered = cart.getItemsOrdered();
if (itemsOrdered.size() == 0) {
out.println("No items in your cart...
");
} else {
// If there is at least one item in cart, show table
// of items ordered.
out.println
("\n" +
"\n" +
" | Item ID | Description\n" +
" | Unit Cost | Number | Total Cost");
ItemOrder order;
// Rounds to two decimal places, inserts dollar
// sign (or other currency symbol), etc., as
// appropriate in current Locale.
NumberFormat formatter =
NumberFormat.getCurrencyInstance();
String formURL =
"/servlet/coreservlets.OrderPage";
// Pass URLs that reference own site through encodeURL.
formURL = response.encodeURL(formURL);
// For each entry in shopping cart, make
// table row showing ID, description, per item
// cost, number ordered, and total cost.
Second edition of this book: www.coreservlets.com; Sequel: www.moreservlets.com.
Servlet and JSP training courses by book's author: courses.coreservlets.com.
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