Spring-boot the boot process, the principle of
Including the IOC, AOP, Dependency Injection in the end what, why, how to do, bean management are all how to do.
Spring-boot common comment
@Configuration, ConfigurationProperties ...
What Java annotations, why, how do
Why is Java reflection how what to do, why what how dynamic proxies do?
Java class loading mechanism, classloader how does it work?
A look you know, ClassLoader java Detailed ultra-detailed in