Spring (5)

Implement the beanpostprocessor interface and implement the methods in it. Then, configure the bean in the XML file to program all beans. That is to say, the beanpostprocessor method is executed during bean instantiation. Note that the before and after methods are not called together. After the before method is implemented, you can (not necessarily) execute the two methods ( Follow these steps to list ) Before calling the after method.1. Implement the initialingbean interface and implement the afterpropertiesset method. 2. Customize the method by yourself. In the bean settings, there is an attribute init-method = "method name", and then in CodeThe public void method () {} custom method can not be configured in the XML file, but is annotated with @ postconstruct