The Java Boutique: Server-Side Web Applications Using Servlets and JSP: Part 11: JavaServer Pages (JSP)

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Tutorials : Server-Side Web Applications Using Servlets and JSP :
: JavaServer Pages (JSP)

Contents

Template Text (Static HTML)

JSP Scripting Elements: Expressions, Scriptlets, and Declarations

Example using Scripting Elements and Directives

Predefined Variables

JSP Comments and Character Escaping Conventions

6. Example Using Scripting Elements and Directives

Here is a simple example showing the use of JSP expressions, scriptlets, declarations, and directives. You can also download the source or try it on-line.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Using JavaServer Pages</TITLE>

<META NAME="author" CONTENT="Marty Hall -- hall@apl.jhu.edu">
<META NAME="keywords"
      CONTENT="JSP,JavaServer Pages,servlets">
<META NAME="description"
      CONTENT="A quick example of the four main JSP tags.">
<LINK REL=STYLESHEET
      HREF="My-Style-Sheet.css"
      TYPE="text/css">
</HEAD>

<BODY BGCOLOR="#FDF5E6" TEXT="#000000" LINK="#0000EE"
      VLINK="#551A8B" ALINK="#FF0000">

<CENTER>
<TABLE BORDER=5 BGCOLOR="#EF8429">
  <TR><TH CLASS="TITLE">
      Using JavaServer Pages</TABLE>
</CENTER>
<P>

Some dynamic content created using various JSP mechanisms:
<UL>
  <LI><B>Expression.</B><BR>
      Your hostname: <%= request.getRemoteHost() %>.
  <LI><B>Scriptlet.</B><BR>
      <% out.println("Attached GET data: " +
                     request.getQueryString()); %>
  <LI><B>Declaration (plus expression).</B><BR>
      <%! private int accessCount = 0; %>
      Accesses to page since server reboot: <%= ++accessCount %>
  <LI><B>Directive (plus expression).</B><BR>
      <%@ page import = "java.util.*" %>
      Current date: <%= new Date() %>
</UL>


</BODY>
</HTML>

Here's a typical result:

JspTest Output

This tutorial is now available as a book: Core Servlets and JavaServer Pages by Marty Hall, published by Sun Microsystems Press. Read all about it at CoreServlets.com

Server-Side Web Applications using Java Servlets versions 2.1/2.2 and JavaServer Pages (JSP) version 1.0: A Tutorial
© 1999-2000 Marty Hall.
All source code freely available for unrestricted use.
Created for work in the Research and Technology Development Center of the Johns Hopkins University Applied Physics Lab, for courses in the Johns Hopkins Part-Time MS Program in Computer Science, and for various industry seminars and on-site Java short courses.
Please note that this is a first draft of the tutorial, so please send corrections, comments, and suggestions to me at hall@apl.jhu.edu.
Reprinted with permission from the author. Click here to visit the original version

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