Flexible dependency injection with XML annotation- based configuration styles Advanced support for aspect-oriented programming with proxy-based and AspectJ-based variants. First-class support for common open source frameworks such as Hibernate and Quartz A flexible web framework for building RESTful MVC

Spring is the most popular application development framework for enterprise Java. Millions of developers around the world use Spring Framework to create high performing, easily testable, reusable code. Spring framework is an open source Java platform and it was initially written by Rod Johnson and was first released under the Apache 2.0 license in June 2003. Spring is lightweight when it comes to size and transparency. The basic version of spring framework is around 2MB.The core features of the Spring Framework can be used in developing any Java application, but there are extensions for building web applications on top of the Java EE platform. Spring framework targets to make J2EE development easier to use and promote good programming practice by enabling a POJO-based programming model. The Spring Framework provides a comprehensive programming and configuration model for modern Javabased enterprise applications on any kind of deployment platform. A key element of Spring is infrastructural support at the application level: Spring focuses on the "plumbing" of enterprise applications so that teams can focus on application-level business logic, without unnecessary ties to specific deployment environments. Spring includes: Flexible dependency injection with XML annotationbased configuration styles Advanced support for aspect-oriented programming with proxy-based and AspectJ-based variants. First-class support for common open source frameworks such as Hibernate and Quartz A flexible web framework for building RESTful MVC applications and service endpoints Spring is modular in design, allowing for incremental adoption of individual parts such as the core container or the JDBC support. While all Spring services are a perfect fit for the Spring core container, many services can also be used in a programmatic fashion outside of the container.