Let us discuss JSF annotations with below example.
Example explanation:
Create a managed bean class “HelloWorld.java” which is used for interacting with User Interface and business logic. HelloWorld.java contains the getter method of message property. The @ManagedBean annotation property specify the managed bean name. The @SessionScoped annotation specify the scope of the managed bean. Insert the JSF controller servlet “FacesServlet” entry into web.xml. Create a jsf page “helloworld.xhtml”. The managedBeanName.mangedBeanProperty expression calls the getter method of the mangedBeanProperty so in our example helloWorld.message calls the getter of message property in HelloWorld.java.
Example:
HelloWorld.java
package com.javawithease.business; import javax.faces.bean.ManagedBean; import javax.faces.bean.SessionScoped; /** * Managed bean. * @author javawithease */ @ManagedBean(name="helloWorld") @SessionScoped public class HelloWorld { public String getMessage() { return "JSF hello world example using annotation."; } } |
faces-config.xml
<?xml version="1.0" encoding="windows-1252"?> <faces-config version="2.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd"> </faces-config> |
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <servlet> <servlet-name>faces</servlet-name> <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>faces</servlet-name> <url-pattern>/faces/*</url-pattern> </servlet-mapping> </web-app> |
helloworld.xhtml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core"> <h:head> <title>JSF hello world example using annotation.</title> </h:head> <h:body> <h3><h:outputText value="#{helloWorld.message}"/></h3> </h:body> </html> |
URL:
http://localhost:7001/JSFExample2/faces/helloworld.xhtml
Output:
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