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我有一個Primefaces dialog，裏面有一個tabView。在這個tabView中，我有3個選項卡，每個選項都被稱爲ui：include。在第一個標籤中，我有一個selectOneMenu，它定義了ProprietarioORM類中名爲tipoProprietario的屬性。選項卡之間的導航不是通過標籤本身完成的（在這個階段它們被禁用），而是通過對話框底部的命令按鈕完成。當我點擊一個命令按鈕從第一個標籤tipoProprietario正確填充。但是，當我點擊從第二個第三個選項卡（或甚至第一個）傳遞時，我發現selectItem值更改爲null。因此，tipoProprietario屬性也更改爲null。在調試中，我看到它首先被稱爲Select Item偵聽器方法，並在tipoProprietario之後。p：selectOneMenu在選項卡變更時更改
有人可以解釋爲什麼會發生這種情況嗎？如何糾正？
dialog.xhtml
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<p:dialog id="dlgEdicao" widgetVar="dlgEdicao" resizable="false"
closable="true" modal="true" closeOnEscape="true"
header="#{(proprietarioMB.edicao)? msg['proprietario.titulo.editar']: msg['proprietario.titulo.incluir']}">
<p:tabView id="tabEdicao" widgetVar="tabEdicao" dynamic="true"
styleClass="tabEdicaoProprietario" cache="false"
binding="#{proprietarioMB.tabEdicao}">
<p:tab id="tabProprietario" title="#{msg['proprietario.titulo']}"
disabled="#{not proprietarioMB.edicao}" titleStyleClass="">
<ui:include src="./aba_proprietario.xhtml" />
</p:tab>
<p:tab id="tabEnderecoContato"
title="#{msg['proprietario.titulo.aba.endereco']}"
disabled="#{not proprietarioMB.edicao}">
<ui:include src="./aba_endereco_contato.xhtml" />
</p:tab>
<p:tab id="tabVeiculo"
title="#{msg['proprietario.titulo.aba.veiculo']}"
disabled="#{not proprietarioMB.edicao}">
<ui:include src="./aba_veiculo.xhtml" />
</p:tab>
</p:tabView>
<f:facet name="footer">
<p:commandButton id="btnDialogoAnterior"
value="#{msg['titulo.anterior']}"
rendered="#{not proprietarioMB.edicao}" immediate="true"
disabled="#{not proprietarioMB.btnAnteriorHabilitado}"
actionListener="#{proprietarioMB.doEventClickBtnAnterior}"
update="@this tabEdicao btnDialogoSeguinte btnDialogoConcluir"
style="margin-right: 20px;" />
<p:commandButton id="btnDialogoSeguinte"
value="#{msg['titulo.proximo']} #{(not proprietarioMB.btnConcluirVisivel)? '': 'display: none;'}"
rendered="#{not proprietarioMB.edicao}"
actionListener="#{proprietarioMB.doEventClickBtnSeguinte}"
update="@this tabEdicao btnDialogoAnterior btnDialogoConcluir"
style="margin-right: 20px; #{(not proprietarioMB.btnConcluirVisivel)? '': 'display: none;'}" />
</f:facet>
</p:dialog>
</ui:composition>
aba_proprietario.xhtml（第一標籤）
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<p:panel id="pnlDadosProprietario">
<p:focus for="selTipoEdicao" />
<p:fieldset id="fieldDadosProprietario"
legend="#{msg['proprietario.titulo']}"
rendered="#{not empty proprietarioMB.proprietario}">
<p:panelGrid id="pnlDadosProprietarioEdicao">
<p:row>
<p:column>
<p:outputLabel id="lblTipoEdicao"
value="#{msg['proprietario.titulo.tipo']}" for="selTipoEdicao" />
</p:column>
<p:column>
<p:selectOneMenu id="selTipoEdicao"
value="#{proprietarioMB.proprietario.tipoProprietario}"
valueChangeListener="#{proprietarioMB.doEventTipoDocumentoPesquisaChanged}"
immediate="true">
<f:selectItems value="#{proprietarioMB.tiposProprietarios}" />
<p:ajax event="change" update="txtDocumentoEdicao" />
</p:selectOneMenu>
</p:column>
<p:column>
<p:outputLabel id="lblDocumentoEdicao"
value="#{msg['proprietario.titulo.documento']}"
for="txtDocumentoEdicao" />
</p:column>
<p:column>
<p:inputMask id="txtDocumentoEdicao"
value="#{proprietarioMB.proprietario.documento}"
mask="#{proprietarioMB.mascaraDocumento}" />
</p:column>
</p:row>
</p:panelGrid>
</p:fieldset>
</p:panel>
</ui:composition>
託管bean
@ManagedBean
@ViewScoped
public class ProprietarioMB {
private static final String MASCARA_CPF = "999.999.999-99";
private static final String MASCARA_CNPJ = "99.999.999/9999-99";
private static final SelectItem[] tiposProprietarios = new SelectItem[] {
new SelectItem(JURIDICA, JURIDICA.getDescricao()),
new SelectItem(FISICA, FISICA.getDescricao()), };
private ProprietarioORM proprietario;
private String mascaraDocumento;
private TabView tabEdicao;
/**
* Select Item listener method: Changes inputMask mask
*/
public void doEventTipoDocumentoPesquisaChanged(ValueChangeEvent event) {
this.mascaraDocumento = (event.getNewValue() == FISICA) ? MASCARA_CPF
: MASCARA_CNPJ;
}
public void doEventClickBtnAnterior() {
System.out.println("ProprietarioMB.doEventClickBtnAnterior(): "
+ this.tabEdicao.getActiveIndex());
this.tabEdicao.setActiveIndex(this.tabEdicao.getActiveIndex() - 1);
}
public void doEventClickBtnSeguinte() {
System.out.println("ProprietarioMB.doEventClickBtnSeguinte(): "
+ this.tabEdicao.getActiveIndex());
System.out.println("ProprietarioMB.doEventClickBtnSeguinte(): "
+ this.proprietario);
if (this.tabEdicao.getActiveIndex() == 0) {
if (this.validarProprietario()) { // Validation method
this.tabEdicao.setActiveIndex(1);
}
} else if (this.tabEdicao.getActiveIndex() == 1) {
this.tabEdicao.setActiveIndex(2);
}
}
// Other methods + getters & setters
}
ProprietarioORM
public class ProprietarioORM {
private String nome;
private TipoProprietarioEnum tipoProprietario;
// getters & setters
}