Compare Beans From Factory Bean : Xml Bean Factory « Spring « Java Tutorial

1. Java Tutorial
2. Spring
3. Xml Bean Factory

File: context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
                http://www.springframework.org/schema/beans
                http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="sha" class="MessageDigestFactoryBean">
        <property name="algorithm" value="SHA1"/>
    </bean>

    <bean id="md5" class="MessageDigestFactoryBean"/>
    
</beans>

File: Main.java

import java.security.MessageDigest;

import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;

public class Main {
  public static void main(String[] args) throws Exception {
    XmlBeanFactory factory = new XmlBeanFactory(new ClassPathResource("context.xml"));
    MessageDigestFactoryBean factoryBean = (MessageDigestFactoryBean) factory.getBean("&sha");
    String d1 = (String) factory.getBean("sha");
    String d2 = (String) factoryBean.getObject();
    System.out.println("Equal created? " + (d1.equals(d2)));
  }

}

class MessageDigestFactoryBean implements FactoryBean, InitializingBean {
  private static final String DEFAULT_ALGORITHM = "MD5";

  private String algorithm = DEFAULT_ALGORITHM;

  public Object getObject() throws Exception {
    return this.algorithm;
  }

  public Class getObjectType() {
    return MessageDigest.class;
  }

  public boolean isSingleton() {
    return true;
  }

  public void setAlgorithm(String algorithm) {
    this.algorithm = algorithm;
  }

  public void afterPropertiesSet() throws Exception {
    this.algorithm += " after setting";
  }
}

28.6.Xml Bean Factory
	28.6.1.	Xml Bean Factory Demo
	28.6.2.	Static Factory
	28.6.3.	Compare Beans From Factory Bean
	28.6.4.	Create XmlBeanFactory from ClassPathResource
	28.6.5.	BeanFactory Aware
	28.6.6.	Non Static Factory
	28.6.7.	Hierarchical BeanFactory Demo
	28.6.8.	Add BeanFactory PostProcessor To XmlBeanFactory
	28.6.9.	Add addBeanPostProcessor To XmlBeanFactory