Beans in Spring can be either singletons or prototypes. Singleton means that only one instance of the bean will be maintained by the Spring and will be returned every time you call the getBean() method. If you set the scope to prototype, then a new bean will be created every time you call the getBean() method.
The default is singleton. In Java configuration, you can specify that a bean scope is prototype by specifying @Scope("prototype") over the bean definition.
Traditionally Spring applications were configured using only xml configurations. Later annotations such as @Component came and complemented the xml configuration. However later XML configurations were completely replaced by Java configurations that use annotations such as @Bean.
In xml configuration, you use xml to configure beans.
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