"Spring Source Learning" Beanpostprocessor Interface Learning

One: Meaning function

The ==>beanpostprocessor interface is one of many spring-to-developer custom logic expansion interfaces that are provided to developers in the bean lifecycle.

Two: interface definition

Package Org.springframework.beans.factory.config;import org.springframework.beans.BeansException;  Public Interface beanpostprocessor {    /* *     *IOC The Bean in the container is instantiated     before executing the */    Object Postprocessbeforeinitialization (Object Bean, String beanname) throws beansexception;     /* *     Execute     after the bean in the *IOC container is instantiated *     /Object Postprocessafterinitialization (object Bean, String beanname) throws beansexception;}

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Three: custom instance (executes when the IOC is instantiated and prints the content. XML configuration beans, or annotated annotations to take effect)

Package Com.mobile.thinks.manages.study;import Org.springframework.beans.beansexception;import Org.springframework.beans.factory.config.beanpostprocessor;import org.springframework.stereotype.component;@ Component Public classMybeanpostprocessor implements beanpostprocessor{/** * The Bean in the IOC container executes the method before it is instantiated*/@Override PublicObject Postprocessbeforeinitialization (Object bean, String beanname) throws Beansexception {Cl the<?> cls=Bean.getclass (); System. out. println ("sxf "Custom instantiation before" Postprocessbeforeinitialization classpath ==>"+CLS); System. out. println ("SXF "Before custom instantiation" Postprocessbeforeinitialization initializes the name of the object ==>"+beanname); returnBean; }        /** * The Bean in the IOC container executes the method after it is instantiated*/@Override PublicObject Postprocessafterinitialization (Object bean, String beanname) throws Beansexception {class
    <?> cls=Bean.getclass (); System. out. println ("sxf "After custom instantiation" Postprocessbeforeinitialization classpath ==>"+CLS); System. out. println ("sxf "After custom instantiation" Postprocessbeforeinitialization initializes the name of the object ==>"+beanname); returnBean; }        }

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Four: Spring Internal example

"Spring Source Learning" Beanpostprocessor Interface Learning