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POSimple tag not able to intrepret session scope attribute
 

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    <p>I'm trying to display an attribute value of <strong>ArrayList</strong> from JSP set in session scope in servlet as:</p> <pre><code> hs.setAttribute("Attr",arr); //where hs is reference to HttpSession and arr is of type of ArrayList </code></pre> <p>But when I invoked simple tag with the EL expression as <strong>optionList</strong> attribute value of advice tag in JSP as:</p> <pre><code>&lt;%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %&gt; &lt;%@ taglib prefix="mine" uri="DiceFunctions" %&gt; &lt;html&gt;&lt;body&gt; &lt;mine:advice optionList='${sessionScope.Attr}' /&gt; &lt;/body&gt;&lt;/html&gt; </code></pre> <p>I displayed nothing.</p> <p>The code of Simple tag handler is:</p> <pre><code>package foo; import javax.servlet.jsp.JspException; import javax.servlet.jsp.tagext.*; import java.io.*; import javax.servlet.jsp.*; import java.util.*; public class AdvisorTagHandler extends SimpleTagSupport{ String name; String size; ArrayList option; public void doTag() throws JspException,IOException{ JspWriter out=getJspContext().getOut(); for(Object o: option) { out.print(out.toString()); } public void setOptionList(List value) { option=(ArrayList)value; } } </code></pre> <p>and TLD, which is set in WEB-INF folder is:</p> <pre><code>&lt;?xml version="1.0" encoding="ISO-8859-1"?&gt; &lt;taglib 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/web-jsptaglibrary_2_0.xsd" version="2.0"&gt; &lt;tlib-version&gt;1.2&lt;/tlib-version&gt; &lt;jsp-version&gt;1.2&lt;/jsp-version&gt; &lt;uri&gt;DiceFunctions&lt;/uri&gt; &lt;tag&gt; &lt;name&gt;advice&lt;/name&gt; &lt;tag-class&gt;foo.AdvisorTagHandler&lt;/tag-class&gt; &lt;body-content&gt;empty&lt;/body-content&gt; &lt;attribute&gt; &lt;name&gt;optionList&lt;/name&gt; &lt;type&gt;java.util.List&lt;/type&gt; &lt;required&gt;false&lt;/required&gt; &lt;rtexprvalue&gt;true&lt;/rtexprvalue&gt; &lt;/attribute&gt; &lt;/tag&gt; &lt;/taglib&gt; </code></pre> <p>What's wrong I'm doing? How can I display the value of ArrayList object?</p> <p>Thanks in advance.</p>
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