Custom Tag doubt

[sudha javvadi]

Hi all,
I am learning how to create a custom tag. I found an example and trying to implement . Iam getting an error: Unable to initialize TldLocationsCache: XML parsing error on file /WEB-INF/Heading.tld: (line 3, col 6).

My Heading.tld is as follows:

    
 <?xml version="1.0" encoding="ISO-8859-1" ?>   
<!DOCTYPE taglib   
     "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2/EN"  
           "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">   
  
<taglib>   
  
<tlibversion>1.2</tlibversion>   
<jspversion>2.0</jspversion>   
<shortname>head</shortname>   
<uri>Heading</uri>   
  
<tag>   
<name>heading</name>   
<tagclass>actions.HeadingTag</tagclass>   
<info>Outputs a 1-cell table used as a heading.</info>   
<bodycontent>JSP</bodycontent>   
<attribute>   
<name>bgColor</name>   
<required>true</required> <!-- bgColor is required -->   
</attribute>   
<attribute>   
<name>color</name>   
<required>false</required>   
</attribute>   
<attribute>   
<name>align</name>   
<required>false</required>   
</attribute>   
<attribute>   
<name>fontSize</name>   
<required>false</required>   
</attribute>   
<attribute>   
<name>fontList</name>   
<required>false</required>   
</attribute>   
<attribute>   
<name>border</name>   
<required>false</required>   
</attribute>   
<attribute>   
<name>width</name>   
<required>false</required>   
</attribute>   
</tag>   
</taglib>     

I am using struts1.3.8,Tomcat6. Is anything wrong with DOCTYPE?? Please help me in solving this error. I tried removing the DOCTYPE, now I am getting error: /pages/HeadingExample.jsp(11,0) Unable to load tag handler class "actions.HeadingTag" for tag "head:heading"


Thankyou,

Sudha.
SCJP1.5

[sudha javvadi]

Hi all,

I am getting the error: /pages/HeadingExample.jsp(11,0) Unable to load tag handler class "actions.HeadingTag" for tag "head:heading" .

I am trying all the possible ways to solve this error. I noticed that there is no .class file for this HeadingTag.java. So I compiled this file separetly to check whether this file works correctly. But I got 13 errors. I really couldn't get why Iam getting all these errors. What's wrong with this java file.

HeadingTag.java

  package actions;
import javax.servlet.*;  // I am getting error as all these packages does not exist
import javax.servlet.http.*;
import javax.servlet.jsp.tagext.*;
import javax.servlet.jsp.*;
import java.io.*;
public class HeadingTag extends TagSupport {
	private String bgColor; // The one required attribute
	private String color = null;
	private String align="CENTER";
	private String fontSize="36";
	private String fontList="Arial, Helvetica, sans-serif";
	private String border="0";
	private String width=null;
	public void setBgColor(String bgColor) {
	this.bgColor = bgColor;
	}
	public void setColor(String color) {
	this.color = color;
	}
	public void setAlign(String align) {
	this.align = align;
	}
	public void setFontSize(String fontSize) {
	this.fontSize = fontSize;
	}
	public void setFontList(String fontList) {
	this.fontList = fontList;
	}
	public void setBorder(String border) {
	this.border = border;
	}
	public void setWidth(String width) {
	this.width = width;
	}
	public int doStartTag() {
		try {
		JspWriter out = pageContext.getOut();
		out.print("<TABLE   + bgColor + "\"" +
 		"  + align + "\"");
 		if (width  {
 		out.print("  + width + "\"");
 		}
 		out.print("><TR><TH>");
 		out.print("<SPAN STYLE=\"" +
 		"font-size: " + fontSize + "px; " +
 		"font-family: " + fontList + "; ");
 		if (color != null) {
 		out.println("color: " + color + ";");
 		}
 		out.print("\"> "); // End of <SPAN ...>
 		} catch(IOException ioe) {
 		System.out.println("Error in HeadingTag: " + ioe);
 		}
 		return(EVAL_BODY_INCLUDE); // Include tag body
 		}
 		public int doEndTag() {
 		try {
 		JspWriter out = pageContext.getOut();
 		out.print("</SPAN></TABLE>");
		} catch(IOException ioe) {
		System.out.println("Error in HeadingTag: " + ioe);
		}
		return(EVAL_PAGE); // Continue with rest of JSP page
		}
}
  

Please guide me what I am doing wrong.

Sudha.

[Balu Sadhasivam]

But I got 13 errors. I really couldn't get why Iam getting all these errors. What's wrong with this java file.

where is your Java file located and how do you compile and what are the 13 errors

import javax.servlet.*; // I am getting error as all these packages does not exist

What container are you using ? seems that your classpath not set correctly.

[Bear Bibeault]

That's the JSP 1.2 format. With Tomcat 6 you should be using JSP 2.0. See the JSP 2.0 Spec for details.

[Seetharaman Venkatasamy]

Bear Bibeault wrote: With Tomcat 6 you should be using JSP 2.0. See the JSP 2.0 Spec for details.

in tomcat6 ,jsp version is 2.1 for more details click here

[sudha javvadi]

Hi all,

Thank you for all your replies. I am using Tomcat6.0. I thought JSP 2 will support JSP1.2. So JSP2.0 wont support classic tags(TagSupport)? I have to use SimpleTag handler?? Tell me the necessary changes I have to do for my code to work. Please send me a link or an example to learn.

Thankyou
Sudha.
SCJP5.0

[Balu Sadhasivam]

JSP 2.1 supports full bacward compatability. Hope this link helps you. ProJSP

[Bear Bibeault]

Of course it does, the point is that there is no need to be using a JSP 1.2 format in a more modern container. It also helps eliminate any possibility of error with mixing old with new.