Exception creating bean of class

[saurav sarkar]

Hi Friends,

I am getting this exception while trying to run my program.

exception

javax.servlet.ServletException: Exception creating bean of class org.jboss.saurav.action.LookupForm: {1}
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.displayMBeans_jsp._jspService(displayMBeans_jsp.java:85)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)


root cause

javax.servlet.jsp.JspException: Exception creating bean of class org.jboss.saurav.action.LookupForm: {1}
org.apache.struts.taglib.html.FormTag.initFormBean(FormTag.java:487)
org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:457)
org.apache.jsp.displayMBeans_jsp._jspx_meth_html_form_0(displayMBeans_jsp.java:101)
org.apache.jsp.displayMBeans_jsp._jspService(displayMBeans_jsp.java:75)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)

Please find below the code.

Struts-config.xml file

    
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
    <data-sources/>
    <form-beans>
        <form-bean name="lookupForm" type="org.jboss.saurav.action.LookupForm"/>
    </form-beans>
   
    <action-mappings>
<action
            path ="/lookup"-
type ="org.jboss.saurav.action.LookupAction"
name="lookupForm"
            scope = "request"
            validate = "false"
input = "displayMBeans.jsp">
            <forward name = "sucess" path = "displayMBeans.jsp"/>
<forward name = "failure" path = "displayMBeans.jsp"/>
        </action>
    </action-mappings>

</struts-config>
 

[saurav sarkar]

This example i am trying to do from a book.
Please find below the other classes and the web.xml

The web.xml

    
<?xml version="1.0"?>
<!DOCTYPE web-app PUBLIC
   "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
   "http://java.sun.com/dtd/web-app_2_3.dtd">
 
<web-app>
   <servlet> 
  <servlet-name>action</servlet-name>
<servlet-class> org.apache.struts.action.ActionServlet </servlet-class> 
<init-param>  
    <param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value> 
  </init-param> 
  <load-on-startup>1</load-on-startup> 
</servlet>  
<servlet-mapping> 
  <servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern> 
</servlet-mapping>  
<welcome-file-list>
<welcome-file>displayMBeans.jsp.jsp</welcome-file>
</welcome-file-list>
<taglib>
<taglib-uri>
/WEB-INF/tld/struts-html
</taglib-uri>
<taglib-location>
/WEB-INF/tld/struts-html.tld
</taglib-location>
</taglib>
</web-app>
 

The Action Class

  
 

import java.io.*;
 
import javax.servlet.ServletException;
import javax.servlet.http.*;
import org.apache.struts.action.*;
 
public class LookupAction extends Action {
 
String target="";
public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response )
throws IOException,ServletException
{
LookupForm lookForm=(LookupForm)form;
String name=lookForm.getName();
if("saurav".equals(name))
{
target=new String("success");
}
else
{
target=new String("failure");
}
return(mapping.findForward(target));
}
}
  

The Form class

    
 

import  org.apache.struts.action.*;
 

public class  LookupForm extends ActionForm
{
 
private String name="";
 
public String getName() {
return name;
}
 
public void setName(String name) {
this.name = name;
}


}
 

Friends please help me out..

Thanks ,
Saurav

[Merrill Higginson]

Nine times out of ten, this error is the result of a simple spelling error. Double check that the fully qualified class name of the form listed in the struts-config.xml file is the actual name of the class.

Secondly, check to make sure that you actually did compile the class and put the .class file in the WEB-INF/classes directory.

[saurav sarkar]

Thanks Merill for your reply.

I have double checked both the names as well
as my classes are inside WEB-INF/Classes/(package)/...

Please advise what to do next

Thanks
Saurav

[Merrill Higginson]

Show is the complete code for your Action form including the package assignment. Also show us the code for your JSP.

[saurav sarkar]

Hi,

This is the code for my form class

import  org.apache.struts.action.*;
 

public class LookupForm extends ActionForm
{
 
private String name="";
 
public String getName() {
return name;
}
 
public void setName(String name) {
this.name = name;
}


}
 

the package is org.jboss.saurav.action

Here is the code for my jsp

 
 
<%@page contentType="text/html"%>
<%@ taglib uri="/WEB-INF/tld/struts-html" prefix="html" %>
 
<html>
<head>
   <title>My Application</title>
</head>
<body>
   <img src="images/logo.gif" align="right" border="0" alt="logo" />
  
   <h1>Wait to see whats going to come</h1>
 
<html:form action="/lookup">
<html:text property="name"/>
<html:submit/>
</html:form>
</body>
</html>
 
   

[Merrill Higginson]

Since you haven't included a package declaration in your code, the ActionForm class is assumed to be in the default package. The first line of your code should be:

package org.jboss.saurav.action;

in order to be consistent the entry in the struts-config.xml.
[ January 08, 2007: Message edited by: Merrill Higginson ]

[saurav sarkar]

Thanks again Merill for your reply.
I did the changes.....but still the error is coming.
Please help.

[Ingoba Ningthoujam]

Saurav how you create your struts application? If all are correct start your application from the struts-blank application WAR file.Hope it will work.

[Ingoba Ningthoujam]

Saurav how you create your struts application? If all are correct start your application from the struts-blank application WAR file.Hope it will work.

[saurav sarkar]

Thanks Ingoba for your reply.
But nothing seems to work

[Ingoba Ningthoujam]

check all the jar files in classpath and struts version.I came across that problem while I was new in struts.Copy your struts blank WAR file in WEBAPP and start Tomcat then it will automatically create your struts-blank applicaion.rename to your project name and change the project name in build.xml in SRC folder to your project name and use this build file to compile your project.Hope it will work.

[Merrill Higginson]

Now check to see that the class is compiled and the .class file exists in the WEB-INF/classes/org/jboss/saurav/action directory.

[saurav sarkar]

Thanks Ingoba and Merill for your reply.
I am not using build.xml.
I am just making a .war folder and deploying
it on jBoss.The class files are compiled
and are under the required package.
But still not working.
Please help

[saurav sarkar]

i believe the reason cud be the version of struts or jboss.
As programmitically everything seems to be fine

[saurav sarkar]

i resolved the problem by changing the TLD versions.
Now i am facing one more problem.


org.apache.jasper.JasperException: /index.jsp(12,0) Unable to find setter method for attribute: name
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:49)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:383)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:141)
at org.apache.jasper.compiler.Generator$GenerateVisitor.generateSetters(Generator.java:1728)
at org.apache.jasper.compiler.Generator$GenerateVisitor.generateCustomStart(Generator.java:1315)
at org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1137)
at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:659)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:999)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:1041)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:1047)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:186)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:999)
at org.apache.jasper.compiler.Generator.generate(Generator.java:1894)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:355)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:427)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:142)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:198)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java

  
package org.jboss.saurav.action;
import  org.apache.struts.action.*;
 

public class LookupForm extends ActionForm
{
 
private String name="";
 
public String getName() {
return name;
}
 
public void setName(String name) {
this.name = name;
}


}
 
  

[Merrill Higginson]

Saurav Java,

Before we get any further with this, there is something you need to take care of.

The name you're using does not meet the standards in The JavaRanch naming policy. According to the policy, the "publicly displayed name" in your profile must not be obiously fictitious.

This may seem like a trivial matter to you, but the naming policy is an important part of the JavaRanch culture, and we take it quite seriously.

Please change your display name before we continue this discussion.

[saurav sarkar]

Hi Merill,

I understand the policy.Sorry for that.
I have changed my display name.

Cheers,
Saurav

[Merrill Higginson]

Saurav,

You shouldn't be getting these errors on such a simple application. I'm going to assume that your Struts installation is seriously messed up and suggest that you start over. Here's what I'd recommend:

Save your work in a separate directory somewhere. Then start with a completely fresh work environment

Go to the Struts Website and re-download whichever version of struts you're using.

Unzip the file you get from the download. Then find the file struts-blank.war and unzip it into a separate directory. If you're using an IDE such as Eclipse, import this directory as a project. This is your new working environment

Recreate your ActionForm and Action classes and your JSP. This time I'd recommend using a simple package name such as test.saurav.

Compile the Java code and make sure that the class files are placed in WEB-INF/classes/<package>

You will find that a shell struts-config.xml file has already been created. Add the <form-bean> and <action> entries to this file, making sure that class names and package names are the right ones and spelled correctly.

Package this environment as a war file, deploy to your application server, and re-test.

[saurav sarkar]

Thanks a lot Merill for your reply.
The problem is i can not download any software
as its against my company policies.
I have worked on JSP/Java Beans a lot.
So, i was trying out with Struts to keep me updated.
Seems that i am stuck big time.
I tried with Jboss and tomcat.
Both are not working

[Merrill Higginson]

If you can't re-download the software, at least look to see if there is an existing struts-blank.war file already at your site that you can use.

[saurav sarkar]

Merill,


I am using struts.jar and all the tlds from
the exsisting apps.I wont be able to
see the blank struts.war


Saurav

[saurav sarkar]

Hi,

I tried with blank struts .war
But then its also giving me xml parsing error in web.xml

Below is the web.xml

 
 
  <?xml version="1.0" encoding="ISO-8859-1" ?> 
- <!-- 
    Licensed to the Apache Software Foundation (ASF) under one or more
    contributor license agreements.  See the NOTICE file distributed with
    this work for additional information regarding copyright ownership.
    The ASF licenses this file to You under the Apache License, Version 2.0
    (the "License"); you may not use this file except in compliance with
    the License.  You may obtain a copy of the License at
   
         <a href="http://www.apache.org/licenses/LICENSE-2.0" target="_blank" rel="nofollow">http://www.apache.org/licenses/LICENSE-2.0</a>
   
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
 

  --> 
  <!DOCTYPE web-app 
  PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
  "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd"> 
- <web-app>
  <display-name>Struts Blank Application</display-name> 
- <!--  Standard Action Servlet Configuration 
  --> 
- <servlet>
  <servlet-name>action</servlet-name> 
  <servlet-class>org.apache.struts.action.ActionServlet</servlet-class> 
- <init-param>
  <param-name>config</param-name> 
  <param-value>/WEB-INF/struts-config.xml</param-value> 
  </init-param>
  <load-on-startup>2</load-on-startup> 
  </servlet>
- <!--  Standard Action Servlet Mapping 
  --> 
- <servlet-mapping>
  <servlet-name>action</servlet-name> 
  <url-pattern>*.do</url-pattern> 
  </servlet-mapping>
- <!--  The Usual Welcome File List 
  --> 
- <welcome-file-list>
  <welcome-file>index.jsp</welcome-file> 
  </welcome-file-list>
  </web-app>
 
   

Please help

[saurav sarkar]

A very strange thing i am finding.....
i have just commented everything in my jsp and struts-config.xml
But still the error "can not find setter method for attribute: name"
is coming.
I even delted the contents of the work folder and the contents of the temp folder of the tomcat directory.
Please help i am unable to find out what is the problem.

Thanks,
Saurav

[RoshaniG Gopal]

I even delted the contents of the work folder and the contents of the temp folder of the tomcat directory.

Hi Saurav,
Try to change the names of the classes and the property from "name" to "firstname" or something. Start a new project.. after all life is not that bad with struts
Secondly, the web.xml is not a valid xml. Please correct the XML and then use it.
Please post your code with the stack trace and exceptions.

[saurav sarkar]

Hi Roshani,

Thanks a lot for your reply.

I tried to change the property name to name1.But the same error.
Please tell me that what is the error in web.xml.
I have removed everything from my web.xml,struts-config.xml and jsp.
But still getting the same jsp error.

Please find the codes below

web.xml

<!DOCTYPE web-app PUBLIC
   "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
   "http://java.sun.com/dtd/web-app_2_3.dtd">
 
<web-app>
   <servlet> 
  <servlet-name>action</servlet-name>
<servlet-class> org.apache.struts.action.ActionServlet </servlet-class> 
<init-param>  
    <param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value> 
  </init-param> 
  <load-on-startup>1</load-on-startup> 
</servlet>  
<servlet-mapping> 
  <servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern> 
</servlet-mapping>  
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<taglib>
<taglib-uri>
/WEB-INF/tld/struts-html
</taglib-uri>
<taglib-location>
/WEB-INF/tld/struts-html.tld
</taglib-location>
</taglib>
</web-app>
 

 
    

Struts-config.xml

    
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_1.dtd">
<struts-config>
 
   <!-- <form-beans>
        <form-bean name="lookupForm" type="org.jboss.saurav.action.LookupForm"/>
    </form-beans>
   
    <action-mappings>
<action path ="/lookup"
    type ="org.jboss.saurav.action.LookupAction"
    name="lookupForm"
                input = "index.jsp">
            <forward name = "sucess" path = "index.jsp"/>
<forward name = "failure" path = "index.jsp"/>
        </action>
    </action-mappings> -->
 

</struts-config> 

Jsp

  
<%@page contentType="text/html"%>
<!--<%@ taglib uri="/WEB-INF/tld/struts-html" prefix="html" %> -->
 
<html>
<head>
   <title>My Application</title>
</head>
<body>
   <img src="images/logo.gif" align="right" border="0" alt="logo" />
  
   <h1>Wait to see whats going to come</h1>
<%
request.setHeader("Pragma", "no-cache");
request.setHeader("Cache-Control", "no-cache");
request.setDateHeader("Expires", 0);
%>
<!--<html:form action="/lookup"
 name="lookupForm"
 type="org.jboss.saurav.action.LookupForm" >
<html:text property="name" />
<html:submit/>
</html:form> -->
 
</body>
</html>
 
  

exception

   
org.apache.jasper.JasperException: /index.jsp(16,4) Unable to find setter method for attribute: name
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:49)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:383)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:141)
at org.apache.jasper.compiler.Generator$GenerateVisitor.generateSetters(Generator.java:1728)
at org.apache.jasper.compiler.Generator$GenerateVisitor.generateCustomStart(Generator.java:1315)
at org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1137)
at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:659)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:999)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:1041)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:1047)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:186)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:999)
at org.apache.jasper.compiler.Generator.generate(Generator.java:1894)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:355)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:427)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:142)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:198)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:138)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2459)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:132)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:593)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:593)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:126)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:534)
 

 
 

Please help.
Life is looking bad for me in struts


Saurav