Java EE web technology version history (updated)

JSR numbers are included as links.
Servers are webcontainers.Take care, web containers do not include JSF. You have to add it yourself or use an enterprise application server. Enterprise application servers are included in the
complete Java EE version overview.

Java EE	servlet	JSP	EL	JSTL	JSF	WebSocket	MVC	Server	What’s new
	2.1	1.0						iPlanet jetty 1	ServletContext, RequestDispatcher
1.2	2.2	1.1						tomcat 3.3 jetty 3	war
1.3	53 2.3	53 1.2						tomcat 4.1 jetty 4	filters
1.4	154 2.4	152 2.0	1.0	52 1.1				tomcat 5.5 jetty 5
5	2.5	245 2.1	2.1	1.2	127 1.2			tomcat 6 jetty 6	annotations
6	315 3.0	2.2	2.2		314 2.0			tomcat 7 jetty 8	asynchronous servlets, EL method calls, more...
7	340 3.1		341 3.0		344 2.2	356 1.0		tomcat 8 jetty 9.1	HTML 5, non blocking (Listener) servlet IO
8	369 4.0				372 2.3	1.1	371 1.0	tomcat 9	HTTP/2

servlets / JSP links (updated)

•  Java EE7 javadoc
• or get it from java EE download page
• MIME types list 
• Core servlets
• servlet utilities sample code 
• Compressing Servlet Filter 
• For servlet 3.1 you need to delegate extra abstract methods (isReady, setWriteListener) to the ServletOutputStream you are wrapping
• Writing JSPX documents
• JSP technology home
• JSTL specification
• Firefox RESTClient addon

Adding JSTL/JSP EL to your web applicaton (updated)

Quite some environments do not come with JSTL: Eclipse for JEE (Galileo), Tomcat 6, Jetty 6... Follow these steps to add them:

1. Add JSTL
   Grab the JSTL API (jstl-api.jar) and JSTL implementation (jstl-impl-1.2.jar).
   Add the jars to your Container (e.g. Tomcat) lib directory (or your webapp lib).
   Alternatively add them using maven dependencies:
   

   <dependency>
     <groupId>javax.servlet</groupId>
     <artifactId>jstl</artifactId>
     <version>1.2</version>
   </dependency>
   

2. Make sure the web-app root element in web.xml supports at least servlet 2.4/JSP 2.0

   <web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">

   If you use <taglib> elements in web.xml, make sure they are embedded in a <jsp-config> element.

JSP history of writing bean properties

• JSP 0.9

<% ActionForm form = (ActionForm) request.getAttribute(”LoginForm”); %>
<%= form.getUserName()%>

• JSP 1.0

<jsp:useBean id=“form" class=“be.uniway.LoginForm" />
<jsp:getProperty name=“form" property=“userName" />

• Struts

<bean:write name=“loginForm" property="userName"/>

• JSP 1.2

<c:out value} ="${loginForm.userName}">

• JSP 2.0

${loginForm.userName}

JSTL/JSP EL alternate Struts excercise solution

The De Post/PMC excercises (and the Struts blank sample application) are based on

• Struts
  • tags-bean
  • tags-logic
  • tags-html
• JSP scriptlets

In this post we will show how to move this to

• Struts
  • tags-html
• JSTL
• JSP expression language

To enable JSTL/JSP/EL support in your application follow these instructions. Here’s the table from the excercise rendered with JSTL/JSP EL:

<c:forEach  var="product" items="${List}"  varStatus ="status">
  <tr class="${(status.index%2==1)?'odd':'even'}">
    <td>
      <html:link action="<%=modify%>" paramId="id" paramName="product" paramProperty="id">
        <html:img srcKey="icon.edit" altKey="icon.alt.edit" border="0"/>
      </html:link> 
    </td> 
    <td>
      <html:link action="<%=remove %>" paramId="id" paramName="product" paramProperty="id">
        <html:img srcKey="icon.trash" altKey="icon.alt.trash" border="0"/>
      </html:link>
    </td>
    <td> ${product.name}</td> 
    <td> ${product.description}</td>
  </tr>
</c:forEach>