JSF 2 annotations example

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

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