In JSF 2.0, Java bean that can be accessed from JSF page is called Managed Bean. The managed bean can be a normal Java bean, which contains the getter and setter methods, business logic or even a backing bean (a bean contains all the HTML form value).

There are two ways to configure the managed bean :

1. Configure Managed Bean with Annotation

In JSF 2.0, you can annotated a Managed Bean with new @ManagedBean annotation.

package com.mkyong.common;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import java.io.Serializable;
 
@ManagedBean
@SessionScoped
public class HelloBean implements Serializable {
 
	private static final long serialVersionUID = 1L;
 
	private String name;
 
	public String getName() {
		return name;
	}
 
	public void setName(String name) {
		this.name = name;
	}
}

2. Configure Managed Bean with XML

With XML configuration, you can use the old JSF 1.x mechanism to define the managed bean in a normal faces-config.xml file.

<?xml version="1.0" encoding="UTF-8"?>
<faces-config
    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-facesconfig_2_0.xsd"
    version="2.0">
    <managed-bean>
	  <managed-bean-name>helloBean</managed-bean-name>
	  <managed-bean-class>com.mkyong.common.HelloBean</managed-bean-class>
	  <managed-bean-scope>session</managed-bean-scope>
     </managed-bean>
</faces-config>
Best Practice
It’s recommended to put the managed beans in a separate XML file because the faces-config.xml is used to set the application level configurations.

So, you should create a new XML file and put the managed beans detail inside, and declared the XML file in the javax.faces.CONFIG_FILES initialize parameter, which is inside the WEB-INF/web.xml file.

web.xml

 ...
 <context-param>
    <param-name>javax.faces.CONFIG_FILES</param-name>
    <param-value>WEB-INF/manage-beans.xml</param-value>
  </context-param>
...

Download Source Code

Download it – JSF-2-Managed-Beans-Example.zip (10KB)
Tags :
Founder of Mkyong.com, love Java and open source stuff. Follow him on Twitter, or befriend him on Facebook or Google Plus. If you like my tutorials, consider making a donation to the charity, thanks.

Related Posts

Popular Posts