Time for action - using the service

For example, let's implement the list categories functionality in index.jsp. Our index page will list the available categories. For that, it accesses the bookshelf service instance that was stored in the session. 

<%@ page import="java.util.Set"%>
<%@ include file="init.inc.jsp" %>
<html>
<head>
<title>Bookshelf - Browse Categories</title>
<link rel="stylesheet" type="text/css" href="css/style.css" />
</head>
<body>
<%@ include file="menu.inc.jsp" %>
<h2>Bookshelf - Browse Categories</h2>
<% Set<String> categories =
sessionBean.getBookshelf().getCategories(
sessionBean.getSessionId());
%><ul>
<% for (String category : categories) { %>
<li>
<a href="http://byCategory.jsp?category=<%= category %>">
<%=category%></a>
</li>
<% }
%></ul>
</body>
</html>

Each entry in the list links to the byCategory.jsp page, which takes a category as a parameter and lists the books in that category.

The menu.inc.jsp file is a menu table with links to the available operations. It is not listed here.

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