我遇到了一些关于 Primefaces 的问题。有一个要求，当我们将顶部面板中的语言从英语更改为阿拉伯语时，整个布局应该显示在从右到左的位置（就像应用于所有内页的镜像一样）。请帮帮我。
我包括英文版布局、顶部面板和控制器 bean。
1.布局
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>Facelet Title</title>
<style type="text/css">
.ui-growl{
left:20px;
}
</style>
</h:head>
<body>
<ui:composition template="/home/template/common/commonLayout.xhtml">
<ui:define name="content">
<h:form enctype="multipart/form-data" dir="#{localeControllerBean.direction}" id="form1">
<div id="add">
<p:growl id="msgs" autoUpdate="true" display="icon" style="left:20px"></p:growl>
</div>
<p:panel header="#{msg['sponsor_detail']}">
<h:panelGrid columns="2">
<f:event listener="#{localeControllerBean.islang}" type="preRenderView" />
<p:outputLabel for="sname" value="#{msg['sponsor_name']}"
styleClass="label" />
<p:inputText id="sname" value="#{sponsorBean.sponsor_name}"
required="true" requiredMessage="#{msg['sponsor_name_msg']}"
styleClass="input">
<f:validator validatorId="sponsorValidator" />
</p:inputText>
<p:outputLabel for="sadd" value="#{msg['sponsoraddress']}:"
styleClass="label" />
<p:inputText id="sadd" value="#{sponsorBean.s_address}"
required="true" requiredMessage="#{msg['Sponsor_address_msg']}"
styleClass="input" />
<p:outputLabel for="smb" value="#{msg['sponsor_mbno']}:"
styleClass="label" />
<p:inputText id="smb" value="#{sponsorBean.s_mobile_no}"
required="true" requiredMessage="#{msg['sponsor_mbno_msg']}"
styleClass="input" />
<p:outputLabel for="ss" value="#{msg['sponsor_status']}:" styleClass="label" />
<p:inputText id="ss" value="#{sponsorBean.status}" required="true"
requiredMessage="#{msg['sponsor_mbno_msg']}" styleClass="input" />
</h:panelGrid>
<p:commandButton id="submit" value="#{msg['save']}" ajax="false"
action="#{sponsorBean.save}" style="margin-bottom:50px;"
update="msgs" />
<p:commandButton type="reset" value="#{msg['reset']}"
style="margin-bottom:50px;margin-left:30px;" ajax="false" />
</p:panel>
</h:form>
</ui:define>
</ui:composition>
</body>
</html>
2.toppanel在这里我改变语言..
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<h:head>
</h:head>
<body>
<ui:composition>
<h:form>
<p:growl id="messages" >
<p:toolbar style="Font-size:small;">
<p:toolbarGroup align="left">
<h:outputText value="User : " style=" margin-left:15px;" />
<h:outputText value="#{loginBean.username}">
</h:outputText>
<p:commandButton value="Logout" action="#{loginBean.doLogout}" icon="ui-icon-extlink" />
</p:toolbarGroup>
<p:toolbarGroup align="right">
<p:commandButton value="#{loginBean.toggleButton}" action="#{loginBean.goHome}" icon="ui-icon-home"/>
<p:inputText id="firstname" value="#{manageEmployee.search}" dir="ltr" styleClass="input" style="margin-right:15px" />
<h:selectOneMenu
value="#{manageEmployee.searchFilter}" style="FONT-STYLE: plain; FONT-SIZE:small;margin-right:10px">
<f:selectItem itemLabel="All" itemValue="All" />
<f:selectItem itemLabel="Search by company" itemValue="company" />
<f:selectItem itemLabel="Search by sponsor" itemValue="sponsor" />
</h:selectOneMenu>
<p:commandButton id="submit" value="Search" ajax="false"
action="#{manageEmployee.searchRecords}" update="msgs" style="margin-left:10px" icon="ui-icon-search" />
<h:selectOneMenu value="#{localeBean.language}" onchange="submit()" style="margin-left:10px" >
<f:selectItem itemValue="en" itemLabel="English" />
<f:selectItem itemValue="ar" itemLabel="Arabic" />
</h:selectOneMenu>
</p:toolbarGroup>
</p:toolbar></p:growl>
</h:form>
</ui:composition>
</body>
</html>
3.Local Bean控制器：
import java.util.Locale;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpSession;
@ManagedBean
@SessionScoped
public class LocaleBean {
private Locale locale = FacesContext.getCurrentInstance().getViewRoot().getLocale();
public Locale getLocale() {
return locale;
}
public String getLanguage() {
return locale.getLanguage();
}
public void setLanguage(String language) {
locale = new Locale(language);
FacesContext.getCurrentInstance().getViewRoot().setLocale(locale);
FacesContext facesContext = FacesContext.getCurrentInstance();
HttpSession session = (HttpSession) facesContext.getExternalContext().getSession(true);
session.setAttribute("user", locale);
// session.setAttribute("language", language);
}
public String save()
{
return "homePage";
}
}
4.语言控制器：
import java.util.Locale;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.context.FacesContext;
import javax.faces.event.ComponentSystemEvent;
import javax.servlet.http.HttpSession;
@ManagedBean
@SessionScoped
public class LocaleControllerBean {
public static String dir="";
private String direction="";
public String getDirection() {
return direction;
}
public void setDirection(String direction) {
this.direction = direction;
}
public void islang(ComponentSystemEvent event)
{
FacesContext facesContext = FacesContext.getCurrentInstance();
HttpSession session = (HttpSession) facesContext.getExternalContext().getSession(true);
Locale l=(Locale) session.getAttribute("user");
if(l.toString().equals("ar"))
{
// dir="rtl";
setDirection("rtl");
}
else
{
setDirection("ltr");
// dir="ltr";
}
System.out.println("locale"+l);
facesContext.getViewRoot().setLocale(l);
}
}