To enable us to understand auto-configuration further, let's expand our application class to include a few more lines of code:
ApplicationContext ctx = SpringApplication.run(Application.class, args); String[] beanNames = ctx.getBeanDefinitionNames(); Arrays.sort(beanNames); for (String beanName : beanNames) { System.out.println(beanName); }
We get all the beans that are defined in the Spring application context and print their names. When Application.java is run as a Java program, it prints the list of beans, as shown in the following output :
applicationbasicErrorControllerbeanNameHandlerMappingbeanNameViewResolvercharacterEncodingFilterconventionErrorViewResolverdefaultServletHandlerMappingdefaultViewResolverdispatcherServlet ...
