its a cheat sheet for spring boot's annotation

spring_boot_cheatcheet

@Configuration classes is to be sources of bean definitions for the Spring IoC Container.
@Component is an annotation that allows Spring to automatically detect our custom beans.
// create new bean for your class 
@Bean 
// The scope of a bean defines the life cycle and visibility of that bean in the contexts we use it.
//we have this scope:
//singleton scoped beans are scoped to a single application context only.
//singleton @Scope("singleton") //create class once
//prototype @Scope("prototype ") //create class affter every request Autowire
//request @RequestScope
//session @SessionScope
//application scoped, the same instance of the bean is shared across multiple servlet-based applications running in the same ServletContext
//application @ApplicationScope
//websocket
// this look like the @Autowire with @Qualifier
@Resource("name of the Bean method") 
@Value("${spring.application.name}") //get value from application properties and set on the your variable //with default value @Value("${property_key_name:default_value}")