Spring Framework is using a lot of design patterns, some of the common ones are:
Singleton Pattern: Creating beans with default scope.
Factory Pattern: Bean Factory classes
Prototype Pattern: Bean scopes
Adapter Pattern: Spring Web and Spring MVC
Proxy Pattern: Spring Aspect Oriented Programming support
Template Method Pattern: JdbcTemplate, HibernateTemplate etc
Front Controller: Spring MVC DispatcherServlet
Data Access Object: Spring DAO support
Dependency Injection and Aspect Oriented Programming
