There are five scopes defined for Spring Beans.
singleton: Only one instance of the bean will be created for each container. This is the default scope for the spring beans. While using this scope, make sure spring bean doesn’t have shared instance variables otherwise it might lead to data inconsistency issues because it’s not thread-safe.
prototype: A new instance will be created every time the bean is requested.
request: This is same as prototype scope, however it’s meant to be used for web applications. A new instance of the bean will be created for each HTTP request.
session: A new bean will be created for each HTTP session by the container.
global-session: This is used to create global session beans for Portlet applications.
Spring Framework is extendable and we can create our own scopes too, however most of the times we are good with the scopes provided by the framework.
To set spring bean scopes we can use “scope” attribute in bean element or @Scope annotation for annotation based configurations.
