Why Spring?

Wiring of components through Dependency Injection – Promotes de-coupling among the parts that make the application. Design to interfaces – Insulates a user of a functionality from implementation details. Test-Driven Development (TDD) – POJO classes can be tested without being tied up with the framework. Declarative programming through AOP – Easily configured aspects, esp. transaction support. Simplify use of popular technologies – Abstractions insulate application from specifics, eliminate redundant code – Handle common error conditions – Underlying technology specifics still accessible Conversion of checked exceptions to unchecked. Not an all-or-nothing solution – Extremely modular and flexible. Well designed – Easy to extend – Many reusable classes Integration with other technologies – EJB for J2EE – Hibernate, iBates, JDBC (for data access) – Velocity (for presentation) – Struts and WebWork (For web).