Hola,

Llevo un tiempo trabajando con Struts pero hasta ahora nunca había empezado una apliación web desde 0 con este framework. Utilizo Tomcat 5. 5, eclipse 3. 2 y struts 1.3.8 y con los ejemplos que me vienen con Struts no tengo ningún problema, tanto para arrancar el servidor como para ejecutar las aplicaciones.

Sin embargo con mi aplicación (por ahora totalmente de prueba) me da un error al intentar cargar las clases de struts-config. Xml. En principio se me queja del formulario pero haciendo pruebas he visto que el action tampoco lo puede encontrar. El error me lo da al intentar acceder a la aplicación (el Tomcat arranca sin problemas). Concretamente me muestra la siguiente pila:

28-ago-2007 19:17:41 org.apache.struts. chain.commands.AbstractExceptionHandler execute

ADVERTENCIA: Unhandled exception

java.lang.NullPointerException

at org.apache.struts. config.FormBeanConfig.createActionForm(FormBeanConfig. Java:289)

at org.apache.struts. config.FormBeanConfig.createActionForm(FormBeanConfig. Java:357)

at org.apache.struts. chain.commands.CreateActionForm. Execute(CreateActionForm. Java:92)

at org.apache.struts. chain.commands.ActionCommandBase. Execute(ActionCommandBase. Java:51)

at org.apache.commons. chain.impl.ChainBase. Execute(ChainBase. Java:190)

at org.apache.commons. chain.generic.LookupCommand. Execute(LookupCommand. Java:304)

at org.apache.commons. chain.impl.ChainBase. Execute(ChainBase. Java:190)

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.doGet(ActionServlet. Java:449)

at javax.servlet.http. HttpServlet. Service(HttpServlet. Java:690)

at javax.servlet.http. HttpServlet. Service(HttpServlet. Java:803)

at org.apache.catalina. core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain. Java:269)

at org.apache.catalina. core.ApplicationFilterChain.doFilter(ApplicationFilterChain. Java:188)

at org.apache.catalina. core.StandardWrapperValve.invoke(StandardWrapperValve. Java:210)

at org.apache.catalina. core.StandardContextValve.invoke(StandardContextValve. Java:174)

at org.apache.catalina. core.StandardHostValve.invoke(StandardHostValve. Java:127)

at org.apache.catalina. valves.ErrorReportValve.invoke(ErrorReportValve. Java:117)

at org.apache.catalina. core.StandardEngineValve.invoke(StandardEngineValve. Java:108)

at org.apache.catalina. connector.CoyoteAdapter.service(CoyoteAdapter. Java:151)

at org.apache.coyote. http11.Http11Processor.process(Http11Processor. Java:870)

at org.apache.coyote. Http11. Http11BaseProtocol$Http11ConnectionHandler. ProcessConnection(Http11BaseProtocol. Java:665)

at org.apache.tomcat. util.net.PoolTcpEndpoint. ProcessSocket(PoolTcpEndpoint. Java:528)

at org.apache.tomcat. util.net.LeaderFollowerWorkerThread. RunIt(LeaderFollowerWorkerThread. Java:81)

at org.apache.tomcat. util.threads.ThreadPool$ControlRunnable. Run(ThreadPool. Java:685)

at java.lang.Thread. Run(Thread. Java:619)

28-ago-2007 19:17:41 org.apache.struts. chain.commands.ExceptionCatcher postprocess

ADVERTENCIA: Exception from exceptionCommand "servlet-exception"

java.lang.NullPointerException

at org.apache.struts. config.FormBeanConfig.createActionForm(FormBeanConfig. Java:289)

at org.apache.struts. config.FormBeanConfig.createActionForm(FormBeanConfig. Java:357)

at org.apache.struts. chain.commands.CreateActionForm. Execute(CreateActionForm. Java:92)

at org.apache.struts. chain.commands.ActionCommandBase. Execute(ActionCommandBase. Java:51)

at org.apache.commons. chain.impl.ChainBase. Execute(ChainBase. Java:190)

at org.apache.commons. chain.generic.LookupCommand. Execute(LookupCommand. Java:304)

at org.apache.commons. chain.impl.ChainBase. Execute(ChainBase. Java:190)

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.doGet(ActionServlet. Java:449)

at javax.servlet.http. HttpServlet. Service(HttpServlet. Java:690)

at javax.servlet.http. HttpServlet. Service(HttpServlet. Java:803)

at org.apache.catalina. core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain. Java:269)

at org.apache.catalina. core.ApplicationFilterChain.doFilter(ApplicationFilterChain. Java:188)

at org.apache.catalina. core.StandardWrapperValve.invoke(StandardWrapperValve. Java:210)

at org.apache.catalina. core.StandardContextValve.invoke(StandardContextValve. Java:174)

at org.apache.catalina. core.StandardHostValve.invoke(StandardHostValve. Java:127)

at org.apache.catalina. valves.ErrorReportValve.invoke(ErrorReportValve. Java:117)

at org.apache.catalina. core.StandardEngineValve.invoke(StandardEngineValve. Java:108)

at org.apache.catalina. connector.CoyoteAdapter.service(CoyoteAdapter. Java:151)

at org.apache.coyote. http11.Http11Processor.process(Http11Processor. Java:870)

at org.apache.coyote. Http11. Http11BaseProtocol$Http11ConnectionHandler. ProcessConnection(Http11BaseProtocol. Java:665)

at org.apache.tomcat. util.net.PoolTcpEndpoint. ProcessSocket(PoolTcpEndpoint. Java:528)

at org.apache.tomcat. util.net.LeaderFollowerWorkerThread. RunIt(LeaderFollowerWorkerThread. Java:81)

at org.apache.tomcat. util.threads.ThreadPool$ControlRunnable. Run(ThreadPool. Java:685)

at java.lang.Thread. Run(Thread. Java:619)

28-ago-2007 19:17:41 org.apache.catalina. Core. StandardWrapperValve invoke

GRAVE: Servlet. Service() para servlet action lanzó excepción

java.lang.NullPointerException

at org.apache.struts. config.FormBeanConfig.createActionForm(FormBeanConfig. Java:289)

at org.apache.struts. config.FormBeanConfig.createActionForm(FormBeanConfig. Java:357)

at org.apache.struts. chain.commands.CreateActionForm. Execute(CreateActionForm. Java:92)

at org.apache.struts. chain.commands.ActionCommandBase. Execute(ActionCommandBase. Java:51)

at org.apache.commons. chain.impl.ChainBase. Execute(ChainBase. Java:190)

at org.apache.commons. chain.generic.LookupCommand. Execute(LookupCommand. Java:304)

at org.apache.commons. chain.impl.ChainBase. Execute(ChainBase. Java:190)

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.doGet(ActionServlet. Java:449)

at javax.servlet.http. HttpServlet. Service(HttpServlet. Java:690)

at javax.servlet.http. HttpServlet. Service(HttpServlet. Java:803)

at org.apache.catalina. core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain. Java:269)

at org.apache.catalina. core.ApplicationFilterChain.doFilter(ApplicationFilterChain. Java:188)

at org.apache.catalina. core.StandardWrapperValve.invoke(StandardWrapperValve. Java:210)

at org.apache.catalina. core.StandardContextValve.invoke(StandardContextValve. Java:174)

at org.apache.catalina. core.StandardHostValve.invoke(StandardHostValve. Java:127)

at org.apache.catalina. valves.ErrorReportValve.invoke(ErrorReportValve. Java:117)

at org.apache.catalina. core.StandardEngineValve.invoke(StandardEngineValve. Java:108)

at org.apache.catalina. connector.CoyoteAdapter.service(CoyoteAdapter. Java:151)

at org.apache.coyote. http11.Http11Processor.process(Http11Processor. Java:870)

at org.apache.coyote. Http11. Http11BaseProtocol$Http11ConnectionHandler. ProcessConnection(Http11BaseProtocol. Java:665)

at org.apache.tomcat. util.net.PoolTcpEndpoint. ProcessSocket(PoolTcpEndpoint. Java:528)

at org.apache.tomcat. util.net.LeaderFollowerWorkerThread. RunIt(LeaderFollowerWorkerThread. Java:81)

at org.apache.tomcat. util.threads.ThreadPool$ControlRunnable. Run(ThreadPool. Java:685)

at java.lang.Thread. Run(Thread. Java:619)

Parece que en el método:

protected Class formBeanClass() {

ClassLoader classLoader =

Thread. currentThread (). GetContextClassLoader();

if (classLoader == null) {

classLoader = this. GetClass(). GetClassLoader();

}

try {

return (classLoader. LoadClass(getType()));

} catch (Exception e) {

return (null);

}

}

De la clase FormBeanConfig no consigue cargar la clase java.forms.InputForm.

Por último os adjunto el struts-config que utilizo:

<? 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="inputForm" type="java.forms.InputForm"/>

</form-beans>

<action-mappings>

<action path="/Welcome" type="java.actions.InputAction" name="inputForm">

<forward name="success" path="pages/input. Jsp"/>

</action>

</action-mappings>

</struts-config>

¿Alguien sabe por donde puede venir el problema?

Muchas gracias por adelantado.