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Page 3 of 4
Listing 4 shows the source code for the home.jsp file.
Listing 4. home.jsp
<?xml version="1.0" encoding="UTF-8" ?>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" import="com.geekcap.geeknews.core.*,java.util.List"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Geek News</title>
<link type="text/css" rel="stylesheet" href="css/geeknews.css" />
</head>
<body>
<%@ include file="header.jsp" %>
<div id="mainContent">
<p><a href="post.htm">Post</a></p>
<c:forEach items="${articles}" var="article">
<div class="article">
<p><a href="article.htm?id=<c:out value="${article.id}"/>"><c:out value="${article.title}" /></a>
by <span class="articleAuthor"><c:out value="${article.author}" /></span>
on <span class="articleDate"><fmt:formatDate value="${article.date}" type="both" /></span>
</p>
<p class="articleSummary"><c:out value="${article.summary}" /></p>
</div>
</c:forEach>
</div>
<%@ include file="footer.jsp" %>
</body>
</html>
The details of the HTML and CSS presentation are unimportant for this discussion; what's important is that the request object
has an articles variable in it. The following snippet demonstrates how the JSTL core library is used to iterate over all articles and display
an article's author, title, publication date, and summary:
<c:forEach items="${articles}" var="article">
<p><a href="article.htm?id=<c:out value="${article.id}"/>">
<c:out value="${article.title}" /></a>
by <c:out value="${article.author}" />
on <fmt:formatDate value="${article.date}" type="both" />
</p>
<p class="articleSummary"><c:out value="${article.summary}" /></p>
</c:forEach>
Figure 1 shows a screenshot of the Geek News homepage.
Figure 1. Geek News home page (Click to enlarge.)
The header consists of the words GEEK NEWS, hyperlinked to the home page. The body consists of a Post link, which brings up a form (which you'll implement later) for posting new articles, and then one section for each article
that includes the title, author, publication date, and summary, followed by a horizontal line (implemented as a CSS bottom
border on the article <div>). A footer (not shown) has copyright information (for "Fictitious Company," so don't worry, the code is yours to keep).
The header and footer are imported in the home.jsp page through the JSP include directive. They are both JSPs themselves. In their current state, they could be simple HTML documents, but in the future
you might want to add a login link to the header or administration links to the footer.
Setup and deployment
Before you can compile and deploy the HomePageController, you need to download, decompress, and install the latest Spring Framework version (as of this writing, version 2.5.6) and its dependencies.
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Resources
- Download the complete source code for this article and the JDOM XML-manipulation library, which you'll need to complete the CMS project.
- Martin Fowler explains dependency injection in his paper "Inversion of Control Containers and the Dependency Injection pattern" (January 2004). Also see an updated explanation based on the Spring Framework, in JW Blogs.
- Find the official Spring MVC documentation on the SpringSource homepage. When you're ready for another project, see the Spring MVC tutorial "Developing a Spring Framework MVC application step-by-step" (Thomas Risberg, Rick Evans, and Portia Tung).
- "Spring Web Flow 2: A boon to JSF developers" (Xinyu Liu, JavaWorld, 2008), introduces the Spring module that lets you use JavaServer Faces as a view technology on top of Spring MVC.
- Know your Model 2 history, starting with "Understanding JavaServer Pages Model 2 architecture" (Govind Seshadri, JavaWorld, December 1999).
- Velocity and FreeMarker are two of the view technologies discussed in this article. Find out how they compare in "Velocity or FreeMarker?" (Jeroen van Bergen, JavaWorld, November 2007).
- Read more articles by Steven Haines, who has most recently written for JavaWorld about Terracotta, Jakarta Cactus, and the Java Caching System.
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