JSF hello world example in eclipse

Let us start JSF programming with simple hello world 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. Register the managed bean class into faces-config.xml and provide the details like name and scope etc. Insert the JSF controller servlet “FacesServlet” entry into web.xml. Create a jsf page “helloworld.xhtml”. When “helloworld.xhtml” renders it use managed bean class name defined in faces-config.xml file to access its property. 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;
 
/**
 * Managed bean.
 * @author javawithease
 */
public class HelloWorld {
	public String getMessage() {
		return "JSF hello world example.";
	}
}

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">
 
 
  <managed-bean>
    <managed-bean-name>
    	helloWorld
    </managed-bean-name>
    <managed-bean-class>
    	com.javawithease.business.HelloWorld
    </managed-bean-class>
    <managed-bean-scope>
    	session
    </managed-bean-scope>
  </managed-bean>
 
</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.</title>
	</h:head>
    <h:body> 
    	 <h3><h:outputText value="${helloWorld.message}"/></h3> 
    </h:body>
 
</html>

URL:

http://localhost:7001/JSFExample1/faces/helloworld.xhtml

Output:

JSF example1
 
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