Bill Digman is a Java EE / Servlet enthusiast and Open Source enthusiast who loves working with Caucho's Resin Servlet Container, a Java EE Web Profile Servlet Container. Bill has posted 12 posts at DZone. You can read more from them at their website. View Full User Profile

Tutorial covering JSP 2.2 and Servlets 3.0 with OpenSource Resin Servlet Container: Part 1

10.25.2012
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Let's break this down some. First we setup the page using this JSP page directive:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

The above just says how we want the characters encoded and what the mime type of the page is. Consider it boiler plate for now.

Next we import the JSTL core library, under the tag c as follows:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix ="c" %>

HTML background

Most of the page is boiler plate and simple HTML. If you are new to HTML, try this HTML tutorial.

JSTL c:forEach

The part of the page defines a table and uses the JSTL tag c:forEach to iterate through the books and display them as follows:

	<c:forEach var="book" items="${books}">
		<tr>
			<td>${book.title}</td>
			<td>${book.description}</td>
			<td>${book.price}</td>
			<td>${book.pubDate}</td>
		</tr>
	</c:forEach>

The above literally says iterate over the list of books and render a new row for each book in books. Then it creates a column in each row and outputs the values of the book properties into each column for each property (the title property, the description property, the price property, the pubDate property) to each column.

The syntax ${books}, ${book.title}, ${book.price}, ${book.pubDate} is Unified EL. Unified EL + JSTL allows JSPs to avoid mixing in Java code. It also makes the JSP page more readable to page designers (this has been my experience anyway).

${books} is the same books that we put into request scope in the BookListServlet.doGet method.

//doGet method
		request.setAttribute("books", bookRepo.listBooks());

Bill Digman is a Java EE / Servlet enthusiast and Open Source enthusiast who loves working with Caucho's Resin Servlet Container, a Java EE Web Profile Servlet Container.

 

Caucho's Resin OpenSource Servlet Container

 

Java EE Web Profile Servlet Container

 

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Comments

Bruce Phillips replied on Thu, 2012/10/25 - 11:00am

This is a good article but it could be made much,  much better by providing two items

 

1.  Code download

2.  PDF version that a reader can save to read later or to refer to when needed.  It is very tedious to click through 15 web pages where on each  page the ads and other crap overwhelm the important content.

 

 

Bill Digman replied on Thu, 2012/10/25 - 3:12pm in response to: Bruce Phillips

I'll work on a PDF version right away.

How do you suggest I provide code download?  

Bill Digman replied on Thu, 2012/10/25 - 4:29pm in response to: Bill Digman

The PDF version is attached

Bruce Phillips replied on Thu, 2012/10/25 - 7:02pm in response to: Bill Digman

Thank you very much for the PDF version. 

For the code you could use Eclipse - Export as archived projected which creates a zip of your project.  Other Eclipse users can then import the project directly from the zip.  Non-Eclipse users can unzip the project and view the files also.

 

Henk De Boer replied on Fri, 2012/10/26 - 12:11pm

It's thorough and explains things well, but it's a somewhat confusing setup.

The material being explained; Servlets, JSP and then Scriptlets vs JSTL feels like it comes straight from the early 2000s, but then we do see relative modern annotations on the Servlets and even the use of CDI.

Bill Digman replied on Thu, 2012/11/01 - 11:38am in response to: Henk De Boer

Yep... This is true. In a future article we are going to cover a more CDI centric approach covering @Produces @RequestScoped. Later we will cover JPA, JAX-RS, JCache, etc. and yes maybe even JSF (grumble, grumble)....

Bill Digman replied on Thu, 2012/11/01 - 11:39am

Stay tuned. I have a lot more to say. I think Java EE is more of a cafeteria plan than a one size fits all. You can use Servlets, CDI and JSP for model 2 apps. JAX-RS for RIA clients. Websockets, JCache, etc. Most tutorials wrt Java EE seem to really push JSF and EJB. If you tie Java EE to JSF and EJB and I think it turns a lot of folks off. Java EE is more than this.

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Keenee Madison replied on Thu, 2013/10/31 - 6:33am

JSP technology enables rapid development of web-based applications that are server- and platform-independent.  

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