Please do not ask the life cycle of a Spring Bean!
https://www.jianshu.com/p/1dec08d290c1
Spring Bean Life Cycle (very detailed)
https://www.cnblogs.com/zrtqsk/p/3735273.html
spring source code analysis series (3) spring to expand the interface InstantiationAwareBeanPostProcessor
https://www.cnblogs.com/xiaoxing/p/10270285.html