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POJSP tags + scriptlet. How to enable scriptlet?
 

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    <p>I have a page which uses a tag template. My web.xml is very basic.</p> <p>I simply want to run some code in the page.<br> And no, I'm not interested in tags or other alternative. I want to use the bad-practice scriptlet haha.</p> <p>So far I'm getting this "HTTP ERROR 500" error:</p> <pre><code>Scripting elements ( %!, jsp:declaration, %=, jsp:expression, %, jsp:scriptlet ) are disallowed here. </code></pre> <p>While my files look like:</p> <p>/WEB-INF/web.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"&gt; &lt;welcome-file-list&gt; &lt;welcome-file&gt;index.html&lt;/welcome-file&gt; &lt;welcome-file&gt;index.jsp&lt;/welcome-file&gt; &lt;/welcome-file-list&gt; &lt;/web-app&gt; </code></pre> <p>/WEB-INF/tags/wrapper.tag</p> <pre><code>&lt;%@tag description="Simple Wrapper Tag" pageEncoding="UTF-8"%&gt; &lt;%@ attribute name="title" required="true" type="java.lang.String"%&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"&gt; &lt;html&gt; &lt;head&gt; &lt;title&gt;${title}&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;jsp:doBody /&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>index.jsp</p> <pre><code>&lt;%@page contentType="text/html" pageEncoding="UTF-8"%&gt; &lt;%@taglib prefix="t" tagdir="/WEB-INF/tags"%&gt; &lt;t:wrapper&gt; &lt;jsp:attribute name="title"&gt;My nice title&lt;/jsp:attribute&gt; &lt;jsp:body&gt; &lt;h1&gt;&lt;%="some code generated text"%&gt;&lt;/h1&gt; &lt;/jsp:body&gt; &lt;/t:wrapper&gt; </code></pre> <p>I have tried to modify web.xml to explicitly enable it, like this (not working):</p> <pre><code>&lt;jsp-config&gt; &lt;jsp-property-group&gt; &lt;url-pattern&gt;*.jsp&lt;/url-pattern&gt; &lt;scripting-invalid&gt;false&lt;/scripting-invalid&gt; &lt;/jsp-property-group&gt; &lt;jsp-property-group&gt; &lt;url-pattern&gt;*.tag&lt;/url-pattern&gt; &lt;scripting-invalid&gt;false&lt;/scripting-invalid&gt; &lt;/jsp-property-group&gt; &lt;/jsp-config&gt; </code></pre> <p>So, how do I use pure scriptlets within my tag'ed JSP?</p> <p><strong>EDIT #1</strong>:</p> <p><strong>An ideal code would look like this</strong>, inside a page that uses my template ('wrapper' as the above):</p> <pre><code>&lt;%@page import="java.util.Calendar"%&gt; &lt;%@page contentType="text/html" pageEncoding="UTF-8"%&gt; &lt;%@taglib prefix="t" tagdir="/WEB-INF/tags"%&gt; &lt;t:wrapper&gt; &lt;jsp:attribute name="title"&gt;My nice title&lt;/jsp:attribute&gt; &lt;% final int day_of_week = Calendar.getInstance().get( Calendar.DAY_OF_WEEK); if (day_of_week == Calendar.SATURDAY) { %&gt; &lt;jsp:body&gt; &lt;h1&gt;Have a nice Saturday (&lt;%=Integer.toString(day_of_week)%&gt;)!&lt;/h1&gt; &lt;/jsp:body&gt; &lt;% } else { %&gt; &lt;jsp:body&gt; &lt;h1&gt;Have a nice rest-of-the-week (&lt;%=Integer.toString(day_of_week)%&gt;)!&lt;/h1&gt; &lt;/jsp:body&gt; &lt;% } %&gt; &lt;/t:wrapper&gt; </code></pre> <p>See? Scriptlets between &amp; inside the '' tags. That's exactly what I'm trying to achieve.</p>
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    1. COis this on a local version? What servlet container are you deploying to? It sounds like it is a master web.xml is disallowing this, but need more information to help!
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    2. COIt's on Google App Engine (they use Jetty AFAIK) dev (local) server.
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