[vinodnn]

Dear friends,
I am new to JSP custom tags. I wrote a tag to find the sum of two numbers. For this, I wrote a tag library descriptor(.tld) file, tag handler class and the implementing JSP file. In the beginning, everything worked fine. But whenever, I add new tags along with setter and getter methods or modify the existing tag, it shows the following error message:

org.apache.jasper.JasperException: /custom_tags.jsp(1,0) Unable to find setter method for attribute: first

My tag library code:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN" "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">
<taglib>
<tlibversion>1.2</tlibversion>
<jspversion>1.1</jspversion>
<shortname>sum</shortname>
<uri>tag_lib.tld</uri>
<tag>
<name>sum</name>
<tagclass>strutsproj.tag.SumTag</tagclass>
<bodycontent>empty</bodycontent>
<attribute>
    <name>first</name>
    <required>true</required>
    <rtexprvalue>false</rtexprvalue>
</attribute>
<attribute>
    <name>second</name>
    <required>false</required>
    <rtexprvalue>false</rtexprvalue>
</attribute>
</tag>
</taglib>

My tag handler class:

package strutsproj.tag;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

public class SumTag extends TagSupport {
    String first = null;
    String second = null;
    public int doEndTag() throws JspException {
        try {
            pageContext.getOut().print("Sum = "+(getFirst() + getSecond()));
        } catch(java.io.IOException ioe) {
        }
        return SKIP_BODY;
    }
    public int doStartTag() throws JspException {
        return EVAL_PAGE;
    }
    
    public void setFirst(String first) {
        this.first = first;
    }
    public int getFirst() {
        return Integer.parseInt(this.first);
    }

    public void setSecond(String second) {
        this.second = second;
    }
    public int getSecond() {
        if(this.second != null)return Integer.parseInt(this.second);
        return 0;
    }
}

My JSP page:

<%@ taglib uri="/WEB-INF/tld/tag_lib.tld" prefix="dt" %>
<dt:sum first="5" second="7"/>

I am using Tomcat 4.1.18
What might have caused that error?

[Riyad Kalla]

Honestly I think this is a cache issue. Try restarting MyEclipse and rebuilding your project. Also your URI may be wrong depending on what is in your web.xml file, be sure to read this: http://www.myeclipseide.com/PNphpBB2+file-viewtopic-t-10906.html

Also, you might just want to use JSTL libs and the expression language to accomplish all this.

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