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1. Java Servlet (println statements) :
public void listNames(
HttpServletRequest req,
HttpServletResponse rsp) throws IOException
{
PrintWriter out = rsp.getWriter();
out.println("<b>List of Names</b><p>");
List namesList =
(List)req.getAttribute("NamesList");
Iterator iter = namesList.iterator();
while(iter.hasNext()){
Person p = (Person)iter.next();
out.println(p.getName()+"<br>");
}
}
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HTML embedded in Java:
The servlet writes the response with HTML hardcoded in println statements.
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2. JSP Scriptlet (Java) :
<b>List of Names</b><p>
<%
List namesList =
(List)request.getAttribute("NamesList");
Iterator iter = namesList.iterator();
while(iter.hasNext()){
Person p = (Person)iter.next();
out.println(p.getName()+"<br>");
}
%>
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Java embedded in HTML:
The scriptlet is pure Java code inside a web page between <% and %>
tags. The server transforms the JSP page into a Java Servlet.
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3. JSP JSTL (Standard Template Library) :
<b>List of Names</b><p>
<c:forEach items="${NamesList}" var="person">
<c:out value="${person.name}"/><br>
</c:forEach>
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JSP Programming:
The JSTL version uses EL (expression language) with an XML programming
syntax that includes scoped variables, operators, and object references.
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4. JOT Template :
<b>List of Names</b><p>
JOT.Repeat(JOT.Persons.Next)
JOT.Persons.name<br>
JOT.End
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JOT Tokens in HTML:
The JOT version is plain HTML with JOT Tokens, requiring no knowledge
of JSP, XML, JSTL, or EL.
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