// Get the user's session and shopping cart
HttpSession session = request.getSession(true);
ShoppingCart cart =
(ShoppingCart)session.getValue(session.getId());
// If the user has no cart, create a new one
if (cart == null) {
cart = new ShoppingCart();
session.putValue(session.getId(), cart);
}
// set content-type header before accessing the Writer
response.setContentType("text/html");
PrintWriter out = response.getWriter();
// then write the response
out.println("<html>" +
"<head><title>Book Description</title></head>" +
"<body bgcolor=\"#FFFFFF\">" +
"<center>" +
"<hr> <br> " +
"<h1>" +
"<font size=\"+3\" color=\"red\">Duke's </font>" +
"<font size=\"+3\" color=\"purple\">Bookstore</font>" +
"</h1>" +
"</center>" +
"<br> <hr> <br> ");
//Get the identifier of the book to display
String bookId = request.getParameter("bookId");
if (bookId != null) {
// and the information about the book
BookDBServlet database = (BookDBServlet)
getServletConfig().getServletContext().getServlet("bookdb");
BookDetails bd = database.getBookDetails(bookId);
//Print out the information obtained
out.println("<h2>" + bd.getTitle() + "</h2>" +
" By <em>" + bd.getFirstName() + ", " +
bd.getSurname() + "</em> " +
"(" + bd.getYear() + ")<br> <br>" +
"<h4>Here's what the critics say: </h4>" +
"<blockquote>" + bd.getDescription() +
"</blockquote>" +
"<h4>Our price: $" + bd.getPrice() + "</h4>" +
"<center>" +
"<p><a href=\"" +
response.encodeUrl("/servlet/catalog?Buy=" + bookId) +
"\"> Add this item to your shopping cart.</a></p>" +
"</center>");
}
out.println("</body></html>");
out.close();
