JSF/PrimeFaces selectOneMenu change view-id

问题

I'm using JSF2 and PrimeFaces3. How can I write selectOneMenu that would invoke JSF navigation to redirect user to another page when he change option in menu?

回答1:

Attach an ajax listener and let it navigate by NavigationHandler.

E.g.

<h:form>
    <h:selectOneMenu value="#{navigator.outcome}">
        <f:selectItem itemLabel="Select page..." />
        <f:selectItem itemValue="page1" itemLabel="Page 1" />
        <f:selectItem itemValue="page2" itemLabel="Page 2" />
        <f:selectItem itemValue="page3" itemLabel="Page 3" />
        <f:ajax listener="#{navigator.navigate}" />
    </h:selectOneMenu>
</h:form>

(the above example expects page1.xhtml, page2.xhtml and page3.xhtml in the same context; you can even make it a <f:selectItems> instead)

with

private String outcome;

public void navigate() {
    FacesContext context = FacesContext.getCurrentInstance();
    NavigationHandler navigationHandler = context.getApplication().getNavigationHandler();
    navigationHandler.handleNavigation(context, null, outcome + "?faces-redirect=true");
}

The ?faces-redirect=true is not necessary, but it effectively sends a redirect so that the URL in browser address bar will properly change which is better for user experience and bookmarkability of the pages.

回答2:

You could have something like:

<p:selectOneMenu value="#{myBean.mySelectedPage}">
           <f:selectItem itemValue="http://www.yahoo.com" itemLabel="yahoo"  />
           <f:selectItem itemValue="http://www.google.com" itemLabel="google" />
           <f:selectItem itemValue="search.jsf" itemLabel="search" />
           <p:ajax event="change" listener="#{myBean.myNavigationMethod}" />
 </p:selectOneMenu>

and on your navigationMethod you have:

String myPage = mySelectedPage
FacesContext.getCurrentInstance().getExternalContext().redirect(myPage);

The first two selectItem are for a full url and the last one is for another page in your web application(be careful that the extension must be the one set in your web.xml - it could be .jsf, .xhtml, .htm etc)

回答3:

Instead of using ajax navigation use the following:

<p:selectOneMenu value="#{navigator.outcome}" onchange="window.location =this.options[this.selectedIndex].value">                      
    <f:selectItem itemLabel="Select page..." />
    <f:selectItem itemValue="page1" itemLabel="Page 1" />
    <f:selectItem itemValue="page2" itemLabel="Page 2" />
    <f:selectItem itemValue="page3" itemLabel="Page 3" />
    <p:ajax event="change" listener="#{navigator.navigate}" />
</p:selectOneMenu>

This works even if the session times out.

来源：https://stackoverflow.com/questions/8255472/jsf-primefaces-selectonemenu-change-view-id

标签

jsf

jsf-2

navigation

primefaces

selectonemenu