Exception creating bean of class

[hildich kilal]

I am creating a simple Struts application; I am getting following exception when I invoke a struts servlet.

javax.servlet.ServletException: Exception creating bean of class java.mybank.appl.CustomerForm: {1}
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:848)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl

Following are details of my code

struts-config.xml

  <!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.1//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
 
<struts-config>
 <form-beans>
 <form-bean name="CustomerForm" type="java.mybank.appl.CustomerForm"/>
 </form-beans>
 
 <global-forwards>
 <forward name="mainpage" path="/index.jsp" />
 </global-forwards>
 
 <action-mappings>
 <action path="/submitCustomerActionForm"
 type="java.mybank.appl.CustomerAction"
 name="CustomerForm"
 scope="request"
 validate="true"
 input="/CustomerDetails.jsp">
 <forward name="success" path="Success.jsp"/>
 <forward name="failure" path="Failure.jsp"/>
 
 </action>
 </action-mappings>
 
 <controller processorClass="org.apache.struts.action.RequestProcessor"/>
 <message-resources parameter="java.mybank.app1.App1Messages"/>
 
</struts-config>  

class is apprpritately defined and in correct package. Can anyone help what can be posible cause?

thanks

[Sagar Rohankar]

Which Struts version you are using ?

[Merrill Higginson]

See question 9 of our FAQ.

[hildich kilal]

Struts - 1.3.8

[hildich kilal]

Originally posted by Merrill Higginson:
See question 9 of our FAQ.

Merril,

I in fact followed and verified all the four things, the name, spelling, class file existance, and public constructor. Every thing seems to be fine. There must be some very stupid mistake I may be making.. still sturggling.

Thanks

[Sagar Rohankar]

Problem may be because of you are using old dtd , see here for old version

       <!DOCTYPE struts-config PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN"
    "http://jakarta.apache.org/struts/dtds/[B]struts-config_1_1.dtd[/B]">
     
    <struts-config>
     <form-beans>
     <form-bean name="CustomerForm" type="java.mybank.appl.CustomerForm"/>
     </form-beans>
     
     <global-forwards>
     <forward name="mainpage" path="/index.jsp" />
     </global-forwards>
     
     <action-mappings>
     <action path="/submitCustomerActionForm"
     type="java.mybank.appl.CustomerAction"
     name="CustomerForm"
     scope="request"
     validate="true"
     input="/CustomerDetails.jsp">
     <forward name="success" path="Success.jsp"/>
     <forward name="failure" path="Failure.jsp"/>
     
     </action>
     </action-mappings>
     
     <controller processorClass="org.apache.struts.action.RequestProcessor"/>
     <message-resources parameter="java.mybank.app1.App1Messages"/>
     
    </struts-config>  
 
   

Try to make it 1.2 or 1.3 ,

and remove this line , and see .

 <controller processorClass="org.apache.struts.action.RequestProcessor"/>   

See whether this works or not !

[hildich kilal]

Hello Sagar,

That was a good catch I appreciate. But still problem persists. Following is my new struts-config.xml file

  <?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd">
 
<struts-config>
 <form-beans>
 <form-bean name="CustomerForm" type="java.mybank.appl.CustomerForm" />
 </form-beans>
 
 <global-forwards>
 <forward name="mainpage" path="/index.jsp" />
 </global-forwards>
 
 <action-mappings>
 <action path="/submitCustomerActionForm"
 type="java.mybank.appl.CustomerAction"
 name="CustomerForm"
 scope="request"
 validate="true"
 input="/CustomerDetails.jsp">
 <forward name="success" path="Success.jsp"/>
 <forward name="failure" path="Failure.jsp"/>
 
 </action>
 </action-mappings>
 
 <message-resources parameter="java.mybank.app1.App1Messages"/>
 
</struts-config>  

ALso here is my web.xml in ncase there is any issue here. (which I doubt)

  <?xml version="1.0" encoding="UTF-8"?>
<!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>
<display-name>Hello world stuts applicaiton</display-name>
<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>
<init-param>
<param-name></param-name>
<param-value></param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>3</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>3</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/struts-html.tld</taglib-uri>
        <taglib-location>/WEB-INF/struts-html.tld</taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
        <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
        <taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>/WEB-INF/struts-tiles.tld</taglib-uri>
        <taglib-location>/WEB-INF/struts-tiles.tld</taglib-location>
    </taglib>
</web-app>  

Thanks for help..

[hildich kilal]

I just looked in the catalina_logs file in tomcat/logs folder and here is exception trace I found. IF this can be of any help.

  SEVERE: Error creating form bean of class java.mybank.appl.CustomerForm
java.lang.NullPointerException
at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:289)
at org.apache.struts.util.RequestUtils.createActionForm(RequestUtils.java:254)
at org.apache.struts.util.RequestUtils.createActionForm(RequestUtils.java:208)
at org.apache.struts.taglib.html.FormTag.initFormBean(FormTag.java:505)
at org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:482)
at org.apache.jsp.CustomerDetails_jsp._jspx_meth_html_form_0(org.apache.jsp.CustomerDetails_jsp:172)
at org.apache.jsp.CustomerDetails_jsp._jspx_meth_html_html_0(org.apache.jsp.CustomerDetails_jsp:118)
at org.apache.jsp.CustomerDetails_jsp._jspService(org.apache.jsp.CustomerDetails_jsp:82)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Unknown Source)  

[hildich kilal]

Looks like I finally resolved the issue. Let me update here soon once I fully resolve the new issue I am facing. I will put in the reason here.

Thanks for all the help

[hildich kilal]

Yes it is resolved. The whole Issue was that I was using "Java" in my package name. I think this is restricted!!! I didnt know this till now though I am working in java for some long time now.

Merill you also have mentioned this in one of other threads at a place
http://www.coderanch.com/t/58159/Struts/Missing-message-key-welcome-title

Thanks for all your help and time Sagar / Merill.

[Sagar Rohankar]

The 'java' word in package was my doubt when I first saw your question , but I didn't dare to point, coz its looks fine, Why cant we create a sub package like java.util.myutil package, If This package is in my classpath, then whts the big issue ?

[hildich kilal]

I think this is restricted by "Java" people. May be because if in future they need to have some package with exactly same name then the application will break.
As they keep on releasing new versions so people should not create any package in their own projects which may contradict with any probable future package of java.

Thats my understanding.

[Sagar Rohankar]

Originally posted by Himanshu Kapil:
I think this is restricted by "Java" people. May be because if in future they need to have some package with exactly same name then the application will break.
As they keep on releasing new versions so people should not create any package in their own projects which may contradict with any probable future package of java.

Thats my understanding.

Ok thats sounds reasonable !

Any other non-guessed answer ?

[Merrill Higginson]

Just so you all know, I've added the java package name problem to the FAQ as one other thing to look for if you get the "Cannot create bean" message.