Spring Boot boot process

1: Determine if it is a Web environment

2: Load all the meta-inf/spring.factories Applicationcontextinitializer under Classpath

3: Load all the meta-inf/spring.factories Applicationlistener under Classpath

4: Infer the class where the Main method resides

5: Start execution of the Run method

6: Set java.awt.headless system variable

7: Load all the meta-inf/spring.factories Springapplicationrunlistener under Classpath

8: Perform the Started method of all Springapplicationrunlistener

9: Instantiating a Applicationarguments object

10: Create Environment

11: Configure environment, mainly to configure the parameters of the Run method into the environment

12: Perform the environmentprepared method of all Springapplicationrunlistener

13: If it is not a web environment, but the environment of the web, then the environment of the web is converted into a standard environment

14: Print Banner

15: Initialize ApplicationContext

If it is a web environment, instantiate the Annotationconfigembeddedapplicationcontext object

If not the Web environment: Annotationconfigapplicationcontext

16: If the beannamegenerator is not empty, the Beannamegenerator object is injected into the context

17: Callback All the Applicationcontextinitializer methods

18: Perform all the contextprepared methods of the Springapplicationrunlistener

19: Inject applicationarguments into the spring container in turn, Banner

20: Load all sources into context

21: Perform all the contextloaded methods of the Springapplicationrunlistener

22: Perform the Refresh method of the context and invoke the Registershutdownhook method of the context

23: Callback, gets all the Applicationrunner,commandlinerunner interfaces in the container, and then sorts the calls in sequence

24: Perform all the finished methods of the Springapplicationrunlistener

25: Boot Complete

Spring Boot boot process