<p>A Spring BeanFactory is like a factory class that contains a collection of beans. The Spring BeanFactory holds Bean Definitions of multiple beans within itself and then instantiates the bean whenever asked for by clients.</p>
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<ul style="color: #274e13; text-align: left;">
<li>Spring <i><b>BeanFactory </b></i>is able to create associations between collaborating objects as they are instantiated. This removes the burden of configuration from bean itself and the beans client.</li>
</ul>
<ul style="text-align: left;">
<li> Spring <i><b> BeanFactory </b></i>also takes part in the life cycle of a bean, making calls to custom initialization and destruction methods.</li>
</ul>
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<p>This is the simplest container providing basic support for <b>DI</b> and defined by the <b>org.springframework.beans.factory.BeanFactory</b> interface. The <i><b>BeanFactory </b></i>and related interfaces, such as <i><b>BeanFactoryAware</b></i>, <b><i>InitializingBean</i></b>, <i><b>DisposableBean</b></i>, are still present in Spring for the purposes of backward compatibility with the large number of third-party frameworks that integrate with Spring.</p>
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<p><b>Triangle.java</b></p>
<pre class="highlight">package com.sdnext.dineshonjava.beanfactory.tutorial; 
 
public class Triangle 
{ 
 public void draw() 
 { 
 System.out.println("Drawing Triangle"); 
 } 
} 
</pre>
<p><b>spring.xml</b></p>
<pre class="highlight"><;beans xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" xmlns:> 
<b>Drawing.java</b> 
<pre class="highlight">package com.sdnext.dineshonjava.beanfactory.tutorial; 
 
import org.springframework.beans.factory.BeanFactory; 
import org.springframework.beans.factory.xml.XmlBeanFactory; 
import org.springframework.core.io.FileSystemResource; 
 
/** 
 * @author Dinesh Rajput 
 * 
 */ 
public class DrawingApp 
{ 
 /** 
 * @param args 
 */ 
 public static void main(String[] args) 
 { 
 //Triangle triangle = new Triangle(); 
 BeanFactory factory = new XmlBeanFactory(new FileSystemResource("spring.xml")); 
 Triangle triangle = (Triangle) factory.getBean("triangle"); 
 triangle.draw(); 
 } 
}</pre>
<p> ;</p>
<div style="color: #274e13;">There are following two important points to note about the main program:</div>
<ol class="list" style="color: #274e13;">
<li>First step is to create factory object where we used framework API <b>XmlBeanFactory()</b> to create the factory bean and <b>ClassPathResource()</b> API to load the bean configuration file available in CLASSPATH. The <b>XmlBeanFactory()</b> API takes care of creating and initializing all the objects ie. beans mentioned in the configuration file.</li>
<li>Second step is used to get required bean using <b>getBean()</b> method of the created bean factory object. This method uses bean ID to return a generic object which finally can be casted to actual object. Once you have object, you can use this object to call any class method.</li>
</ol>
<div style="color: #274e13;">After run the Drawing class we will get following Output on console.</div>
<div style="background-color: #ff99cc; border-width: thin; border: solid;">
<div style="color: blue;"><b>Output:</b></div>
<div style="color: red;">Jun 17, 2012 3:47:36 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions</div>
<div style="color: red;">INFO: Loading XML bean definitions from file [F:my workspacespring03BeanFactoryDemospring.xml]</div>
<p><b>Drawing Triangle</b></p>
</div>
<p> ;</p>
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<p> ;</p>
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<div style="color: #274e13;"><b>In <a href="https://dineshonjava.com/application-context-in-spring/">Next Chapter</a> we will discuss same example using <a href="https://dineshonjava.com/application-context-in-spring/">Application Context Container</a>.</b><br />
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<p><b> <;<; <a href="https://dineshonjava.com/spring-ioc-container/">Previous</a> || <a href="https://dineshonjava.com/application-context-in-spring/">Next</a> >;>; </b><br />
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