[JSP] Son pieno di sti errori: help! :(

[Matrixbob]

HTTP Status 500 - 
--------------------------------------------------------------------------------

type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

org.apache.jasper.JasperException: /CustomTagWelcome.jsp(13,4) Unable to load tag handler class "com.deitel.advjhtp1.jsp.taglibrary.WelcomeTagHandler" for tag "advjhtp1:welcome"
	org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
	org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:405)
	org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:196)
	org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1318)
	org.apache.jasper.compiler.Parser.parseElements(Parser.java:1564)
	org.apache.jasper.compiler.Parser.parse(Parser.java:126)
	org.apache.jasper.compiler.ParserController.doParse(ParserController.java:211)
	org.apache.jasper.compiler.ParserController.parse(ParserController.java:100)
	org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:146)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.


--------------------------------------------------------------------------------
Apache Tomcat/5.5.9

[Matrixbob]

[Matrixbob]

Stavo facendo prove sui "custom-tag" del JSP.

..... i 4 file:
1 file.java
1 file.class
1 file.jsp
1 file.tld

dove vanno messi secondo voi?!

Io ho messo come al solito:

il file.class nella cartella "...\WEB-INF\classes"

il file.java nella cartella "...\WEB-INF\src"

il file.jsp & il file.tld nella cartella "...\WEB-INF\"

[Matrixbob]

Il file "CustomTagWelcome.jsp" è così fatto:

<?xml version = "1.0"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

   <%-- taglib directive --%>
   <%@ taglib uri = "advjhtp1-taglib.tld" prefix = "advjhtp1" %>

<html xmlns = "http://www.w3.org/1999/xhtml">

<head><title>Simple Custom Tag Example</title></head>

<body>

<p>The following text demonstrates a custom tag:</p>
<h1><advjhtp1:welcome /></h1>

</body>

</html>

[Matrixbob]

Se poi faccio il reload inizia ad alternarsi con:

HTTP Status 500 - 
--------------------------------------------------------------------------------
type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

org.apache.jasper.JasperException: Unable to load class for JSP
	org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:591)
	org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:137)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root cause 

java.lang.ClassNotFoundException: org.apache.jsp.CustomTagWelcome_jsp
	java.net.URLClassLoader$1.run(Unknown Source)
	java.security.AccessController.doPrivileged(Native Method)
	java.net.URLClassLoader.findClass(Unknown Source)
	org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:158)
	org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:71)
	org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:589)
	org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:137)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.
--------------------------------------------------------------------------------
Apache Tomcat/5.5.9

[Matrixbob]

Questo è il file.tld:

<?xml version = "1.0" encoding = "ISO-8859-1" ?> <!DOCTYPE taglib PUBLIC
"-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN"
"http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">

   
<!-- a tag library descriptor -->
   
<taglib>

      <tlibversion>1.0</tlibversion>
      <jspversion>1.1</jspversion>
      <shortname>advjhtp1</shortname>
      
      <info>A simple tab library for the examples</info>
   
      <!-- A simple tag that outputs content -->
      
      <tag>

         <name>welcome</name>
         
         <tagclass>com.deitel.advjhtp1.jsp.taglibrary.WelcomeTagHandler</tagclass>
         
         <bodycontent>empty</bodycontent>
   
         <info>Inserts content welcoming user to tag libraries</info>
 
      </tag>

</taglib>

[Matrixbob]

Questo invece è il file.java che compilo:

package com.deitel.advjhtp1.jsp.taglibrary;

// Java core packages
import java.io.*;
   
// Java extension packages
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
  
public class WelcomeTagHandler extends TagSupport {

  // Method called to begin tag processing
  public int doStartTag() throws JspException
      {
       // attempt tag processing
         try {
            // obtain JspWriter to output content
            JspWriter out = pageContext.getOut();
   
            // output content
            out.print( "Welcome to JSP Tag Libraries!" );
         }
         
         // rethrow IOException to JSP container as JspException
         catch( IOException ioException ) { throw new JspException( ioException.getMessage() ); }
         
         return SKIP_BODY;  // ignore the tag's body
      }
}

[Matrixbob]

Mi sembra un errore di Package, soprattutto quando menziona:
org.apache.jsp.CustomTagWelcome_jsp

che dite?!
C'è soluzione?!

[Matrixbob]

Originariamente inviato da Matrixbob

Mi sembra un errore di Package, soprattutto quando menziona:
org.apache.jsp.CustomTagWelcome_jsp

che dite?!
C'è soluzione?!

Ho poi risolto in questo 3D:
[JAVA] 4 domande: package, WAR, JAR, ...