Apostila FJ21 da caelum: Capítulo sobre struts[Resolvido]

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#1

Bom dia pessoal, estou tendo dificuldades em configurar o struts conforme sugerido no capítulo 11 da apostila fj21 da caelum. Procedi da seguinte forma: Baixei o pacote struts-2.1.8.1-all.zip e o descompactei em minha área de trabalho, depois copiei a pasta lib do mesmo para o diretório WEB-INF/lib do meu projeto(fj21-tarefas).
Configurei o web.xml

[code]<?xml version="1.0" encoding="UTF-8"?>

fj21-tarefas

index.html
index.htm
index.jsp
default.html
default.htm
default.jsp

struts2 org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter struts2 /*

[/code]

Criei a classe OlaMundoAction.java

[code]package br.com.caelum.tarefas.action;

import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;

public class OlaMundoAction {
@Action(value = “olaMundoStruts”, results = { @Result(location = “/olaMundoStruts.jsp”, name = “ok”) })
public String execute() {
System.out.println(“Executando a lógica com Struts2”);
return “ok”;
}
}[/code]

e o arquivo olaMundoStruts.jsp

[code]

Olá mundo com Struts2!


[/code]

Quando acesso a url http://localhost:8080/fj21-tarefas/olaMundoStruts é exibida a página de erro 404. A saída do tomCat é a seguinte:

[code]09/04/2010 10:28:36 org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Arquivos de programas\Java\jre6\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Arquivos de programas/Java/jre6/bin/client;C:/Arquivos de programas/Java/jre6/bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Arquivos de programas\Java\jdk1.6.0_18\bin;C:\Python26
09/04/2010 10:28:36 org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property ‘source’ to ‘org.eclipse.jst.jee.server:fj21-tarefas’ did not find a matching property.
09/04/2010 10:28:36 org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
09/04/2010 10:28:36 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1180 ms
09/04/2010 10:28:36 org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
09/04/2010 10:28:36 org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.26
09/04/2010 10:28:38 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
INFO: Parsing configuration file [struts-default.xml]
09/04/2010 10:28:39 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
INFO: Parsing configuration file [struts-plugin.xml]
09/04/2010 10:28:39 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
INFO: Parsing configuration file [struts.xml]
09/04/2010 10:28:40 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
INFO: Initializing Struts-Spring integration…
09/04/2010 10:28:40 com.opensymphony.xwork2.util.logging.commons.CommonsLogger fatal
SEVERE: ********** FATAL ERROR STARTING UP STRUTS-SPRING INTEGRATION **********
Looks like the Spring listener was not configured for your web app!
Nothing will work until WebApplicationContextUtils returns a valid ApplicationContext.
You might need to add the following to web.xml:

org.springframework.web.context.ContextLoaderListener

09/04/2010 10:28:40 com.opensymphony.xwork2.util.logging.commons.CommonsLogger error
SEVERE: Dispatcher initialization failed
java.lang.NullPointerException
at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:209)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyResultType(XmlConfigurationProvider.java:519)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addResultTypes(XmlConfigurationProvider.java:490)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:446)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:264)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:193)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418)
at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:115)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
09/04/2010 10:28:40 org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter struts2
Class: com.opensymphony.xwork2.spring.SpringObjectFactory
File: SpringObjectFactory.java
Method: getClassInstance
Line: 209 - com/opensymphony/xwork2/spring/SpringObjectFactory.java:209:-1
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:431)
at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:115)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.NullPointerException
at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:209)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyResultType(XmlConfigurationProvider.java:519)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addResultTypes(XmlConfigurationProvider.java:490)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:446)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:264)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:193)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418)
… 20 more
09/04/2010 10:28:40 org.apache.catalina.core.StandardContext start
SEVERE: Error filterStart
09/04/2010 10:28:40 org.apache.catalina.core.StandardContext start
SEVERE: Context [/fj21-tarefas] startup failed due to previous errors
09/04/2010 10:28:40 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: A web application created a ThreadLocal with key of type [null] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@f30494]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@b1cc87]) but failed to remove it when the web application was stopped. To prevent a memory leak, the ThreadLocal has been forcibly removed.
09/04/2010 10:28:40 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: A web application created a ThreadLocal with key of type [null] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@eaf40c]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@13c6641]) but failed to remove it when the web application was stopped. To prevent a memory leak, the ThreadLocal has been forcibly removed.

[/code][code]

Segui o conteúdo da apostila à risca, mas mesmo assim não estou conseguindo configurar o struts, há algum erro que cometi e não percebi?

#2

cara, tive esse mesmo problema e me matei tentando resolver… porém consegui
o problema está na importação dos jars, você tem que deiar apenas os seguintes jars na pasta lib:

commons-fileupload-1.2.1.jar
commons-io-1.3.2.jar
commons-logging-1.0.4.jar
commons-logging-api-1.1.jar
freemarker-2.3.15.jar
ognl-2.7.3.jar
spring-test-2.5.6.jar
struts2-convention-plugin-2.1.8.1.jar
struts2-core-2.1.8.1.jar
xwork-core-2.1.6.jar

Sinceramente, eu não entendo o porque. Depois de muito pesquiar na internet, acabei pegando os jars do exemplo “blank” que vem no pacote full do struts, e se nao me engano, apenas adicionei o pacote convention pra usar os annotations…

Aproveito para deixar essa questao em aberto. Alguem sabe porque quando adicionados todos os jars, o struts chama aquele ContextLoaderListener do spring e da erro?

Desde ja agradeço o pessoal!

#3

Muito obrigado Emannuel, vou testar aqui.

#4

Funcionou perfeitamente, obrigado pela ajuda.

#5

oi pessoal

estamos adicionando um rapido howto na apostila pra quem esta utilizando ela fora da caelum, dessa forma vai ficar mais facil de configurar struts2.

se voce deixa todas as dependencias que ja vem com ele, ele reclama que esta faltando classes do Spring, pois o plugin do struts para spring e automaticamente carregado.

#6