将参数从视图传递到控制器的足够方法.随便你吧. <h:inputHidden>在JSF上下文中的用途有所不同，并且只能由onclick中的JavaScript操纵，这很丑.One of the most common approaches to change locale in JSF+Seam - with <h:selectOneMenu>:<h:form action="#{localeSelector.select}" rendered="false"> <h:selectOneMenu value="#{localeSelector.language}" onchange="submit()"> <f:selectItem itemLabel="English" itemValue="en" /> <f:selectItem itemLabel="Francais" itemValue="fr" /> </h:selectOneMenu></h:form>I want to implement locale changes with buttons. So, the question is - how to pass the parameter (en, fr, etc.) to update the bean with <h:commandButton>? Maybe <h:inputHidden> would help? 解决方案 Either pass as method argument (only if your environment supports EL 2.2),<h:commandButton value="English" action="#{localeSelector.change('en')}" /><h:commandButton value="Deutsch" action="#{localeSelector.change('de')}" /><h:commandButton value="Français" action="#{localeSelector.change('fr')}" />withpublic void change(String language) { locale = new Locale(language); // ...}Or use <f:setPropertyActionListener><h:commandButton value="English" action="#{localeSelector.change}"> <f:setPropertyActionListener target="#{localeSelector.language}" value="en" /></h:commandButton><h:commandButton value="Deutsch" action="#{localeSelector.change}"> <f:setPropertyActionListener target="#{localeSelector.language}" value="de" /></h:commandButton><h:commandButton value="Français" action="#{localeSelector.change}"> <f:setPropertyActionListener target="#{localeSelector.language}" value="fr" /></h:commandButton>withprivate String language;public void change() { locale = new Locale(language); // ...}Or use <f:param><h:commandButton value="English" action="#{localeSelector.change}"> <f:param name="language" value="en" /></h:commandButton><h:commandButton value="Deutsch" action="#{localeSelector.change}"> <f:param name="language" value="de" /></h:commandButton><h:commandButton value="Français" action="#{localeSelector.change}"> <f:param name="language" value="fr" /></h:commandButton>withpublic void change() { locale = new Locale(FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("language")); // ...}(you can also let JSF automatically set it by a @ManagedProperty("#{param.language}"), but this requires the bean to be request scoped, or a <f:viewParam>, see also ViewParam vs @ManagedProperty(value = "#{param.id}"))Enough ways to pass a parameter from view to controller. Take your pick. The <h:inputHidden> serves in JSF context a somewhat different purpose and it can only be manipulated by JavaScript in the onclick which is ugly. 这篇关于如何将参数与h:commandButton一起传递的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！