Explain Bean lifecycle in Spring framework?

1.	Explain Bean lifecycle in Spring framework?
Answer» Following is sequence of a bean lifecycle in Spring − Instantiate − First the spring container finds the bean's definition from the XML file and instantiates the bean.. Populate properties − Using the dependency injection, spring populates all of the properties as specified in the bean definition. Set Bean Name − If the bean implements BeanNameAware interface, spring passes the bean's id to setBeanName() method. Set Bean factory − If Bean implements BeanFactoryAware interface, spring passes the beanfactory to setBeanFactory() method. Pre Initialization − Also called postprocess of bean. If there are any bean BeanPostProcessors associated with the bean, Spring calls postProcesserBeforeInitialization() method. Initialize beans − If the bean implements IntializingBean,its afterPropertySet() method is called. If the bean has init method declaration, the specified initialization method is called. Post Initialization − If there are any BeanPostProcessors associated with the bean, their postProcessAfterInitialization() methods will be called. Ready to use − Now the bean is ready to use by the application. Destroy − If the bean implements DisposableBean , it will call the destroy() method .

Answer»

Following is sequence of a bean lifecycle in Spring −

Instantiate − First the spring container finds the bean's definition from the XML file and instantiates the bean..
Populate properties − Using the dependency injection, spring populates all of the properties as specified in the bean definition.
Set Bean Name − If the bean implements BeanNameAware interface, spring passes the bean's id to setBeanName() method.
Set Bean factory − If Bean implements BeanFactoryAware interface, spring passes the beanfactory to setBeanFactory() method.
Pre Initialization − Also called postprocess of bean. If there are any bean BeanPostProcessors associated with the bean, Spring calls postProcesserBeforeInitialization() method.
Initialize beans − If the bean implements IntializingBean,its afterPropertySet() method is called. If the bean has init method declaration, the specified initialization method is called.
Post Initialization − If there are any BeanPostProcessors associated with the bean, their postProcessAfterInitialization() methods will be called.
Ready to use − Now the bean is ready to use by the application.
Destroy − If the bean implements DisposableBean , it will call the destroy() method .

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