managed-bean

问题 I am having this problem in this sample jsf project I created. Managed beans do not get instantiated. Bean class: @ManagedBean(name="loginMB") @RequestScoped public class LoginMB extends AbstractMB { private static final long serialVersionUID = -8523135776442886000L; @ManagedProperty("#{userMB}") private UserMB userMB; //getters and setters public String login() { UserSupport userSupport = new UserSupportImpl(); User user = userSupport.isValidLogin(email, password); if (user != null) {

问题 With all the research I've done on creating managed beans, what I've not noticed (or what I may have overlooked) is when to use explicit naming of the bean e.g. @Named(name = "someBean") . I guess what it hard for me to understand is why you would want to name the bean anything other than your class name: @Named(name = "someBean") public class SomeBean implements Serializebale { } With all the examples I've seen, some use the the explicit name and some just use @Named to leave the default

问题 As we all know that it is recommended to use annotations from javax.enterprise.context instead of javax.faces.bean as they are getting deprecated. And we all found ManagedBeans with eager="true" annotated with @ApplicationScoped from javax.faces.bean and having a @PostConstruct method are very useful to do web application initialization e.g: read properties from file system, initialize database connections, etc... Example : import javax.faces.bean.ApplicationScoped; import javax.faces.bean

问题 I have a Tomcat 6 JSF web application that I'd like to set up with CDI beans. I will have to convert the project to CDI gradually though. My question is: can CDI beans and traditional JSF managed beans be injected into each other? Thanks. 回答1: All JSF managed beans (JMB) either are CDI managed beans (CMB) automatically, or can be recognized as such using the beans.xml marker file. (The requirements of a CMB are set very low and basically just dictate the existence of a non-parameter

问题 I'd like to register/add a Managed Bean class programmatically (from within a Servlet init()) into application scope. How can I do that with JSF 1.2? 回答1: from within a Servlet init() So, it concerns a non-JSF request. The FacesContext#getCurrentInstance() would return null here, so it's of no use for you here. It's good to know that JSF application scoped managed beans are basically stored as an attribute of the ServletContext . In the init() method you've the ServletContext at your hands by

问题 I am using PrimeFaces with JSF2. I am trying to authenticate user by sending login and password as an Ajax request. And in the action method of the backing bean, I am trying to validate user and redirect to a new view if the validation succeeds. Is this possible while using primefaces? Because I think with primefaces' p:commandButton , I can only either have ajax behavior or the navigation. 回答1: Yes, just send a redirect instead of a (default) forward as outcome. The <navigation-case> -less

问题 In my application in some places we are using @ManagedBean annoation for Person bean and for the same Person bean we defining in the faces-confing.xml like below at the same time. @ManagedBean("name=person") @SessionScoped Public class Person{ } faces-config.xml <managed-bean> <managed-bean-name>person</managed-bean-name> <managed-bean-class>com.test.sample.Person</managed-bean-class> <managed-bean-scope>session</managed-bean-scope> </managed-bean> my question is does this approach create two

问题 I would like to read the backing bean value in JSF and then pass over to JavaScript, may I know how this can be done? Backing bean sample code: @ManagedBean(name="enquiry") @SessionScoped public class Enquiry { public boolean noQuery; /** getter and setter **/ } In XHTML sample code, I would like pass the backing bean value and then pass into showNoQueryPrompt() like this: <h:commandLink onClick="showNoQueryPrompt(#{enquiry.noQuery})"> </h:commandLink> And then in JavaScript code, I can read

问题 I have some properties file in /WEB-INF . And I want to load it in a JSF managed bean. Is there any way to do that? 回答1: Use either ExternalContext#getResource() or ExternalContext#getResourceAsStream() wherein you pass the webcontent-relative path. E.g.: ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext(); Properties properties = new Properties(); // ... properties.load(externalContext.getResourceAsStream("/WEB-INF/file.properties")); This delegates under

问题 I have some properties file in /WEB-INF . And I want to load it in a JSF managed bean. Is there any way to do that? 回答1: Use either ExternalContext#getResource() or ExternalContext#getResourceAsStream() wherein you pass the webcontent-relative path. E.g.: ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext(); Properties properties = new Properties(); // ... properties.load(externalContext.getResourceAsStream("/WEB-INF/file.properties")); This delegates under