Implements BeanPostProcessor : BeanPostProcessor « Spring « Java Tutorial

1. Java Tutorial
2. Spring
3. BeanPostProcessor

File: Main.java

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

class Main {
  public static void main(String args[]) throws Exception {
    ApplicationContext ctx = new ClassPathXmlApplicationContext("context.xml");
    ctx.getBean("w");
    

  
  }
}

class BeanInitializationLogger implements BeanPostProcessor {

  public Object postProcessBeforeInitialization(Object bean, String beanName)
      throws BeansException {
    return bean;
  }

  public Object postProcessAfterInitialization(Object bean, String beanName)
      throws BeansException {
    
    System.out.println("Bean '" + beanName + "' initialized");
    return bean;
  }
}

File: context.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

  <bean id="w" class="java.lang.String">
  </bean>

 
  <bean id="beanInitLogger" class="BeanInitializationLogger"/>

</beans>

28.52.BeanPostProcessor
	28.52.1.	Implements BeanPostProcessor