let's code a Spring-like web framework. 1. demo show 2. look how Spring like 3. how our framework works 4. thinking in HTTP protocol 5. let's code a simple http server 6. implement @RestController 7. implement @RequestMapping 8. let's invoke a request 9. code a simple BeanFactory 10. code a demo api 11. cool ascii art when our spring start 12. what others we need? 13. yep, let's add @RequestParam of GET method 14. invite a かわいい volunteer implement @ResponseStatus 15. we need @ControllerAdvice and @ExceptionHandler to process exceptions 16. @Autowired and @Service ... so on ....