managed-bean

Im working on a web application using JSF2 . I want to pass parameters from a managed bean in backing bean action and I want to retrive the same parametrs in an other managed bean the both with a request scope. Thanks in advance. Use <f:param> in the command link/button and use @ManagedProperty or <f:viewParam> in the target bean or view. E.g. <h:commandButton value="Submit" action="#{otherBean.submit}"> <f:param name="foo" value="#{oneBean.foo}" /> </h:commandButton> with in OtherBean @ManagedProperty("#{param.foo}") private String foo; // ... 来源： https://stackoverflow.com/questions/9701590

This question already has an answer here: Identifying and solving javax.el.PropertyNotFoundException: Target Unreachable 13 answers I am trying to get a simple JSF 2 tutorial example to work. I am using the dynamic web project in Eclipse and publishing to a Glassfish 3 server (run -> run on server). The first index.xhtml page loads correctly, but when I have to access a managed bean, the following error displays: /index.xhtml @14,48 value="#{helloBean.name}": Target Unreachable, identifier 'helloBean' resolved to null I've had a look at the various other discussions on this topic, however the

Hi I have a managed bean with some functions , based on some condition in that function I will like to call a dialog box Managed bean function goes as public String editStudent(){ setReadOnly(false); setButton(true, true, true, false, true, true,true); LockItem lItem; if(selectStudent !=null){ lItem = (LockItem) services.getbyId("LockItem", condition); if (lItem == null){ System.out.println("Student Avalibale for process :::"); studentRedirect(); return "studentEdit.jsf?faces-redirect=true"; } else { //To show dialog from here System.out.println("Student Not Avalibale : Locked By " + lItem

I have a composite component (collapsiblePanel). The component uses the "collapsible" bean to provide the toggle function. When I use the same component multiple times on a page, each instance of the component is bound to the same bean instance. How Can I achieve something like a component scoped bean? collapsibleTemp.xhtml : <cc:interface> <cc:attribute name="model" required="true"> <cc:attribute name="collapsed" required="true" /> <cc:attribute name="toggle" required="true" method-signature="java.lang.String f()" /> </cc:attribute> <cc:actionSource name="toggle" /> <cc:facet name="header" />

I'd like to invoke a managed bean action method in an on* attribute. In my particular case I need to logout an user if the user is idle for 3 minutes as below: <p:idleMonitor onidle="#{mybean.processTimeOut()}" timeout="180000" /> However, the managed bean action method is immediately invoked as the page loads. How is this caused and how can I solve it? BalusC Like as all other on* attributes on all JSF components, the onidle attribute must represent a JavaScript callback , not a JSF backing bean action method. Any EL expressions in on* attributes would be evaluated immediately as String value

I see a lot of examples marking beans as entity beans (@Entity) & named beans (CDI), so as to avoid creating 2 classes (managed bean & entity bean) and also to make use of Bean Validation so that validation can be performed on both client & server. So should I be using a single class or not, are there any issues or should I be having my managed beans or service layer create entity beans using the data from managed beans ? Arjan Tijms The @Named or @ManagedBean annotations are typically used to let the bean container (CDI/JSF) create an instance of a bean on demand when referenced by expression