Boa Noite
Estou estudando Java Web e me deparei com esse problema que não estou conseguindo resolver. alguém poderia me dar uma luz onde estou errando?
segue a tela do codigo e dos erros.
Essa é a classe Domain
@SuppressWarnings("serial")
@Entity
public class Estado extends GenericDomain {
@Column(length = 2, nullable = false)
private String sigla;
@Column(length = 100, nullable = false)
private String nome;
public String getSigla() {
return sigla;
}
public void setSigla(String sigla) {
this.sigla = sigla;
}
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
}
Essa é a Classe Bean
package br.com.mega.bean;
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import org.omnifaces.util.Messages;
import br.com.mega.domain.Estado;
@SuppressWarnings(“serial”)
@ManagedBean
@ViewScoped
public class EstadoBean implements Serializable {
private Estado estado;
public Estado getEstado() {
return estado;
}
public void setEstado(Estado estado) {
this.estado = estado;
}
/* Metodo para criar um novo estado */
public void novo() {
estado = new Estado();
}
// Método para salvar
public void salvar() {
Messages.addGlobalInfo("Estado" + estado.getNome() + estado.getSigla());
}
}
Esse é o código da tela
<?xml version="1.0" encoding="ISO-8859-1" ?>
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p=“http://primefaces.org/ui"
xmlns:ui=“http://java.sun.com/jsf/facelets"
template=”/templates/modeloSistema.xhtml”>
<ui:define name="menuLateral">
<ui:include src="/includes/menuPrincipal2.html" />
</ui:define>
<ui:define name="conteudo">
<p:growl id="mensagem" />
<h:form>
<!-- Painel com a listagem dos estados cadastrados -->
<p:panel header="Estado - Listagem">
<!-- Tabela -->
<p:dataTable emptyMessage="Nenhum registro encontrado."
paginator="true">
<!-- cabeçalho -->
<f:facet name="header">
<p:commandButton value="Novo" actionListener="#{estadoBean.novo}"
icon="ui-icon-plusthick"
oncomplete="PF('dialogoCadastro').show();" />
</f:facet>
<!-- Colunas -->
<p:column headerText="Nome">
</p:column>
<p:column headerText="Sigla">
</p:column>
<p:column headerText="Opções">
</p:column>
</p:dataTable>
</p:panel>
<!-- Dialogo para cadastro -->
<p:dialog header="Cadastro - Estado" widgetVar="dialogoCadastro"
draggable="false" resizable="false" modal="true" appendTo="@(body)">
<h:form>
<h:panelGrid columns="2">
<p:outputLabel value="Nome: " />
<p:inputText maxlength="100" size="30"
value="#{estadoBean.estado.nome}" />
<p:outputLabel value="Sigla: " />
<p:inputText maxlength="2" size="5"
value="#{estadoBean.estado.sigla}" />
</h:panelGrid>
<h:panelGrid columns="2">
<p:commandButton value="Salvar" icon="ui-icon-check"
process="@this" actionListener="#{estadoBean.salvar}"
update=":mensagem" />
<p:commandButton value="Cancelar"
oncomplete="PF('dialogoCadastro').hide();" icon="ui-icon-cancel" />
</h:panelGrid>
</h:form>
</p:dialog>
</h:form>
</ui:define>
<ui:define name="rodape">
</ui:define>
</ui:composition>
Se eu coloca somente uma mensagem no Messages.addGlobalInfo e clicar no botão salva, ele me mostra a mensagem normal, mas se eu pedir para mostrar o que foi digitado no inputText ai já me da esse erro abaixo
mar 15, 2018 8:01:29 PM com.sun.faces.application.view.ViewScopeManager <init>
INFORMAÇÕES: CDI @ViewScoped bean functionality unavailable
mar 15, 2018 8:01:29 PM com.sun.faces.lifecycle.InvokeApplicationPhase execute
ADVERTÊNCIA: java.lang.NullPointerException
javax.el.ELException: java.lang.NullPointerException
at org.apache.el.parser.AstValue.invoke(AstValue.java:260)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267)
at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:149)
at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:814)
at javax.faces.component.UICommand.broadcast(UICommand.java:300)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at br.com.mega.bean.EstadoBean.salvar(EstadoBean.java:34)
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.el.parser.AstValue.invoke(AstValue.java:247)
… 32 more
mar 15, 2018 8:01:29 PM com.sun.faces.context.AjaxExceptionHandlerImpl handlePartialResponseError
GRAVE: java.lang.NullPointerException
at br.com.mega.bean.EstadoBean.salvar(EstadoBean.java:34)
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.el.parser.AstValue.invoke(AstValue.java:247)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267)
at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:149)
at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:814)
at javax.faces.component.UICommand.broadcast(UICommand.java:300)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)