Erro JSF — GUJ

Ola Galera estou precisando da ajuda de voces.
Estou seguindo uma apostila de jsf e ja no primeiro exemplo estou com problema.
Vamos la

fiz o arquivo ola.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="f"  uri="http://java.sun.com/jsf/core"%>
<%@ taglib prefix="h"  uri="http://java.sun.com/jsf/html"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Minha Primeira Aplicação</title>
</head>
<body>
<f:view>
<h:form>
<h:outputLabel value="Seu nome: "/>
<h:inputText value="#{usuarioBean.nome}"/>
<h:commandButton value="Enviar"
actionListener="#{usuarioBean.enviar}"/>
<br/>
<h:outputText value="Bem vindo a primeira aplicação JSF, #{usuarioBean.nome}"
rendered="#{usuarioBean.nome != null}"/>
</h:form>

</f:view>
</body>
</html>

depois fiz o Bean UsuarioBean

package com.algaworks.dwjsf.view;

import javax.faces.event.ActionEvent;

public class UsuarioBean {
	private String nome;
	
	public void enviar(ActionEvent event){
		this.setNome(this.getNome().toUpperCase());
	}
	
	
	
	//get
	public String getNome() {
		return nome;
	}

	public void setNome(String nome) {
		this.nome = nome;
	}
	

}

O Faces config esta assim:

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

<faces-config
    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-facesconfig_1_2.xsd"
    version="1.2">
	<managed-bean>
		<managed-bean-name>UsuarioBean</managed-bean-name>
		
		<managed-bean-class>com.algaworks.dwjsf.view.UsuarioBean</managed-bean-class>
		
		<managed-bean-scope>session</managed-bean-scope>
	</managed-bean>

</faces-config>

Bom quando vou acessar aparece a primeira tela para eu digitar o nome, quando clico em enviar ai aparece este erro:

SEVERE: Servlet.service() for servlet Faces Servlet threw exception

org.apache.jasper.el.JspPropertyNotFoundException: /ola.jsp(14,0) ‘#{usuarioBean.nome}’ Target Unreachable, identifier ‘usuarioBean’ resolved to null

at org.apache.jasper.el.JspValueExpression.getType(JspValueExpression.java:61)

at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getConvertedValue(HtmlBasicInputRenderer.java:95)

at javax.faces.component.UIInput.getConvertedValue(UIInput.java:1030)

at javax.faces.component.UIInput.validate(UIInput.java:960)

at javax.faces.component.UIInput.executeValidate(UIInput.java:1233)

at javax.faces.component.UIInput.processValidators(UIInput.java:698)

at javax.faces.component.UIForm.processValidators(UIForm.java:253)

at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1214)

at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1172)

at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76)

at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)

at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)

at javax.faces.webapp.FacesServlet.service(FacesServlet.java:409)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

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

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)

at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)

at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)

at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)

at java.lang.Thread.run(Thread.java:636)

Alguem pode me ajudar?

Opa, beleza?

Você precisa anotar sua classe:

Antes:

package com.algaworks.dwjsf.view;  
  
import javax.faces.event.ActionEvent;  
  
public class UsuarioBean {  
    private String nome;  
      
    public void enviar(ActionEvent event){  
        this.setNome(this.getNome().toUpperCase());  
    }  
      
      
      
    //get  
    public String getNome() {  
        return nome;  
    }  
  
    public void setNome(String nome) {  
        this.nome = nome;  
    }  
      
  
}

Depois:

package com.algaworks.dwjsf.view;  
  
import javax.faces.event.ActionEvent;  
  
@ManagedBean
public class UsuarioBean {  
    private String nome;  
      
    public void enviar(ActionEvent event){  
        this.setNome(this.getNome().toUpperCase());  
    }  
      
      
      
    //get  
    public String getNome() {  
        return nome;  
    }  
  
    public void setNome(String nome) {  
        this.nome = nome;  
    }  
      
  
}

Bons estudos!

[]'s

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