Java Bean access in a JSP Tag handler class

Hello Everybody,
I am trying to access my java bean(ErrorBean.java) in th doEndTag() method of the tag handler class(MyTagHandler.java) and iam getting an "CLASSCAST EXCEPTION"
I am doing it like this in the tag handler class.
MyBeans.ErrorBean errorBean = (MyBeans.ErrorBean)pageContext.getSession().getAttribute("ErrorBean");
Where MyBeans is the package in which my Error Bean is and iam placing the ErrorBean object in the session object before it comes to the jsp page where i have the jsp Custom tag:
<%@ taglib uri="/WEB-INF/taglib.tld" prefix="errors" %>
<errors:message/>
<%@ include file="footer.jsp"%>
I was of the opinion that i was casting it right...can anyone help me to find ...where iam doing it wrong...its really URGENT ..PLEASE

Friend that did not work either ...
u know what...the ErrorTagHandler class is comiling fine with out errors but in the jsp page when the custom tag is hit..this error is showing up when i see the server log.
can you throw some light on this..
thanks..
Firasath

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Hi BalusC,
This is the full history:
I started coding the tag handler classes of my JSF components in the JSF 1.2 way.
But know, Iam being forced to run the web app that uses those JSF 1.2 components in a WAS 6.1 (servlet 2.4 & jsp 2.0, I suppose).
Not very elegant solution, I put a servlet2.5-jsp2.1-api.jar file in my WebContent\WEB-INF\lib directory, and configured a PARENT-LAST class loader policy in the server configuration.
This is my web.xml:
<?xml version="1.0"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
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Tag Handler Class classpath

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You probably should not use unnamed packages at all.
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          Igor Vinnikov <[email protected]> wrote:
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          > and in tld-file in <tagclass> write: %class-name%, but it's doen't work. When
          > jsp starts I recieve:
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Hi,
ive been using the Java Web Services Development Pack
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there are some other folders created by deploytool but they are empty.
heres demo.tld...
<taglib>
<tlib-version>1.0</tlib-version>
<jsp-version>2.0</jsp-version>
<short-name>demo</short-name>
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----

Sincere Apologies - It might be a good idea to compile my java files so i actually have classes in my classes directory !!
i think a build.xml file is needed for ant to compile everything that is needed now.
and the beat goes on !

Tag handler class was not found "org.apache.struts.taglib.tiles.InsertTag"

Hi All,
I have a proble deploying my app with struts 1.3.10, when I run under tomcat 6 on my eclipse, it´s fine, but when I deploy on weblogic send next exception:
####<Apr 2, 2013 4:24:19 PM CDT> <Info> <ServletContext-/slagentes> <DSWLC01K> <svr-slisto> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <> <1364937859494> <BEA-000000> <layout.jsp:142:14: The tag handler class was not found "org.apache.struts.taglib.tiles.InsertTag".
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>
####<Apr 2, 2013 4:24:19 PM CDT> <Error> <HTTP> <DSWLC01K> <svr-slisto> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1364937859499> <BEA-101017> <[ServletContext@159254910[app:slagentes module:/slagentes path:null spec-version:3.0], request: weblogic.servlet.internal.ServletRequestImpl@5ebf5ebf[
POST /slagentes/login.do HTTP/1.1
Connection: keep-alive
Content-Length: 37
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Origin: http://172.17.12.129:7004
User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.43 Safari/537.31
Content-Type: application/x-www-form-urlencoded
Referer: http://172.17.12.129:7004/slagentes/
Accept-Encoding: gzip,deflate,sdch
Accept-Language: es-ES,es;q=0.8
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]] Root cause of ServletException.
weblogic.servlet.jsp.CompilationException: Failed to compile JSP /jsp/template/layout.jsp
layout.jsp:142:14: The tag handler class was not found "org.apache.struts.taglib.tiles.InsertTag".
<tiles:insert attribute="content"/>
^----------^
layout.jsp:142:14: The tag handler class was not found "org.apache.struts.taglib.tiles.InsertTag".
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at weblogic.servlet.jsp.JavelinxJSPStub.reportCompilationErrorIfNeccessary(JavelinxJSPStub.java:225)
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at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:237)
at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:190)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:281)
at weblogic.servlet.internal.ServletStubImpl.onAddToMapException(ServletStubImpl.java:453)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:364)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:221)
at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:567)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:263)
at org.apache.struts.tiles.commands.TilesPreProcessor.doForward(TilesPreProcessor.java:260)
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at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
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at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
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at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3254)
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at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:254)
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>
My weblogic.xml is
<?xml version="1.0" encoding="UTF-8"?>
<wls:weblogic-web-app
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and my weblogic-application.xml is
<?xml version = '1.0' encoding = 'UTF-8'?>
<weblogic-application xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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          <package-name>antlr.*</package-name>
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          <package-name>javax.xml.rpc.*</package-name>
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          <package-name>javax.xml.messaging.*</package-name>
          <package-name>javax.xml.soap.*</package-name>
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</weblogic-application>
please help me

The struts-template tld has been deprecated in favour of the tiles taglib.
If you are using anything above struts 1.0, then you should be using tiles.
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Cheers,
evnafets

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hi,
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note The full stack trace of the root cause is available in the Tomcat logs.
can you help me???????????????????

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i got the jsp and bean worked fine when i have a sinle input text field.
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could anybody tell me that where i should store the bean class in tomcat and do i need to make any package in which i have to place my java bean file plz tell me complete procedure along with code if possible

whew thats a lot of questions... All of this is pretty basic stuff. I would recommend you take a look at the web services tutorial: http://java.sun.com/j2ee/1.4/docs/tutorial/doc/
lets see.
Starting a package name with com is just a generic standard which is followed.
It is most correct when creating commercial packages to create packages like com.companyName.project
http://java.sun.com/docs/codeconv/html/CodeConventions.doc8.html
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Your directory structure should be something like this
webApplicationRootDirectory
- page1.html
- page2.html
- page3.jsp
- page4.jsp
- WEB-INF
     - web.xml
     - classes
       - com
         - myPackage
           - myClass.classerrrm. Thats about it I think.

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private String lastname;
private String city;
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public User(String firstname, String lastname, String city)
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          this.firstname = firstname;
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public String getLastname()
          return lastname;
public void setLastname(String lastname)
     this.lastname = lastname;
//more bean methods for all fields here

Sorry if I wasnt specific enough. I have a link that passes a value (field that is passed is called lastname) to a JSP where I want to show record info for that value that is passed.
My question is how do I show the database record info on Show.jsp for the lastname field value of Jones where I want to use a Java Bean and Database helper class in Show.jsp
Here is the message I get when I hit the link (LinkExample) and it goes to Show.jsp:
org.apache.jasper.JasperException: Cannot find any information on property 'lastname' in a bean of type 'num.UserDB'
.....My UserDB class:
public class UserDB
public User getUser(String lastname)
User user = new User();
        try
     Class.forName("org.gjt.mm.mysql.Driver");
    Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/dbconnone?user=smitherson&password=abcdefg");
    Statement stmt = conn.createStatement();
    ResultSet results = stmt.executeQuery("SELECT * from user where lastname = '" + lastname + "'");
     if(results.next() == true)
     results.next();
     user.setLastname(results.getString("lastname"));
     user.setFirstname(results.getString("firstname"));
                     user.city(results.getString("city"));
     catch(Exception e)
         System.out.println("Exception..." + e);
   return user;
}Bean class:
package num;
public class User
private String firstname;
private String lastname;
private String city;
public User()
     //no arg constructor
public User(String firstname, String lastname, Sting city)
      this.firstname = firstname;
       this.lastname = lastname;
this.city = city;
public String getFirstname()
          return firstname;
public void setFirstname(String firstname)
     this.firstname = firstname;
public String getLastname()
          return lastname;
public void setLastname(String lastname)
     this.lastname = lastname;
public String getCity()
          return city;
public void setCity(String city)
     this.city = city;

JSP Tags, EL and toString() method

Hi,
I want to pass a Java object to a custom tag via EL, but am finding that since the class has a toString() method, EL automatically converts the class to a string using the toString method. Consequently, I get an error because the string cannot be cast back to the parent object in the tag handler class.
I played around with a dummy class and found that if the toString() method wasn't defined, EL would pass the object as is without converting to a string.
Is there some reason for this behaviour and is there some way I can get around this without having to remove the toString() method ? The object I am trying to process is from an external library, so I can't modify it.
Thanks for any tips on this.
Paul Samuel

My initial guess was that you hadn't defined the type of the attribute, and it was defaulting to String as a result. Now that I've seen the tld file thats obviously not the cause.
Next guess: EL evaluation is disabled, and it is interpreting ${model.results} as a string, rather than evaluating it.
1 - What happens if you just put ${1 + 1} onto a JSP page. Does it print ${1 + 1} or evaluate it as 2?
2 - What server are you using? What version? Which J2EE spec does it support?
You can use the following JSP snippet to confirm this info:
<h2> Server Info</h2>
Server info = <%= application.getServerInfo() %> <br>
Servlet engine version = <%= application.getMajorVersion() %>.<%= application.getMinorVersion() %><br>
Java version = <%= System.getProperty("java.vm.version") %><br>
Session id = <%= session.getId() %><br>3 - What version is your web.xml declared as? 2.3 or 2.4?
4- If you have a Servlet2.4/JSP2.0 container (eg Tomcat 5), try putting the following on your page and see if it works
<%@ page isELIgnored="false" %>
http://forum.java.sun.com/thread.jspa?threadID=629437&tstart=0
Cheers,
evnafets

Recursive calls by JSP tag files fail to compile

We're hitting an issue with recursive calls in JSP tag files. I found one unanswered post in the General forum - [Tag Files used recursivily throws exception|https://forums.oracle.com/forums/thread.jspa?threadID=853300] - and was wondering if anyone else has hit this or knows of any work-arounds/patches or knows how to raise suspected bugs with Oracle (when you don't have an official support relationship for WebLogic)?
Example tag file - /WEB-INF/tags/recurse/hello.tag:
<%@ tag body-content="empty" %>
<%@ attribute name="name" required="true" type="java.lang.String"%>
<%@ attribute name="depth" required="true" type="java.lang.Number"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="r" uri="/WEB-INF/tags/recurse/recurse.tld" %>
<table border="1" cellpadding="3" cellspacing="3">
<tr>
<td>
Hello ${name} [${depth}]
</td>
<c:if test="${depth > 1}">
<td>
<r:hello name="${name}" depth="${depth-1}"/>
</td>
</c:if>
</tr>
</table>
Example tld file - /WEB-INF/tags/recurse/recurse.tld:
<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"
version="2.1">
<description>Library with Recursive tag</description>
<tlib-version>1.0</tlib-version>
<shortname>r</shortname>
<tag-file>
<name>hello</name>
<path>/WEB-INF/tags/recurse/hello.tag</path>
</tag-file>
</taglib>
Example jsp file - /recurse/test.jsp:
<%@ page language="java" pageEncoding="UTF-8" contentType="text/html; charset=utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="r" uri="/WEB-INF/tags/recurse/recurse.tld" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Recursive Tag-file Test</title>
</head>
<body>
<c:set var="name" value="${pageContext.request.remoteUser}"/>
<c:set var="depth" value="${5}"/>
<p>Welcome ${name}, here are ${depth} greetings</p>
<r:hello name="${name}" depth="${depth}"/>
</body>
</html>
The expected result from this example would be to get nested 5 HTML tables.
The current behaviour, is the following is shown on screen when loading the test.jsp:
Compilation of JSP File '/recurse/test.jsp' failed:
hello.tag:15:6: Current file's JSP version conflicts with current tag "r:hello"'s.
<r:hello name="${name}" depth="${depth-1}"/>
^-----^
hello.tag:15:6: Current file's JSP version conflicts with current tag "r:hello"'s.
<r:hello name="${name}" depth="${depth-1}"/>
^-----^
I believe the "JSP version conflicts with current tag" message is misleading (you also get the same error referring to the tag file's folder via a tagdir reference from the JSP and defining an 'implicit.tld' which declares version="2.1"). If you take the recursive <r:hello .../> call out of hello.tag the JSP and tag file compile and function fine. I tried the work around mentioned in the forum post mentioned above, taking the recursive call out, deploying, then putting the recursive tag call back in and just updating the tag file doesn't seem to work for me.
Using "weblogic.appc" you get a few more messages, though the issue is the same - tag file doesn't compile:
test.jsp:15:6: The tag handler class was not found "jsp_servlet._tags._recurse.__hello_tag".
<r:hello name="${name}" depth="${depth}"/>
^-----^
test.jsp:15:14: This attribute is not recognized.
<r:hello name="${name}" depth="${depth}"/>
^--^
test.jsp:15:29: This attribute is not recognized.
<r:hello name="${name}" depth="${depth}"/>
^---^
hello.tag:15:6: The tag handler class was not found "jsp_servlet._tags._recurse.__hello_tag".
<r:hello name="${name}" depth="${depth-1}"/>
^-----^
hello.tag:15:6: Current file's JSP version conflicts with current tag "r:hello"'s.
<r:hello name="${name}" depth="${depth-1}"/>
^-----^
Happy to send this example as an ear/war for anyone that's interested.
At this stage, WebLogic seems to be the only servlet container with this limitation.
This has been tested with WebLogic 10.3.3.0 and 12.1.1.0.
The context for this is that the issue is present in a (larger) enterprise application. The above simple example with recursive tags is what we have isolated as the problem.
Although I/we may not have a support relationship for WebLogic, our clients will, so if the solution is apply an already existing patch that solution would be acceptable.

Somethings definitely wrong with your gcc installation.
Which gcc are you using. What output do you get from "which gcc".
Solaris 10 ships with a gcc in /usr/sfw/bin.
If your using a 3rd party gcc try changing your path to put /usr/sfw/bin before whereever the 3rd party gcc lives. Or just uninstall it.

Java Bean access in a JSP Tag handler class

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