Spring is an open source framework created to address the complexities of enterprise application development. One of the main advantages of the framework is its layered architecture, which allows you to choose which components to use while providing an integrated framework for J2EE application development.
In Part 1 of this three-part Spring series , I'll introduce the Spring framework. I'll describe the framework's capabilities from the perspective of the framework's underlying model, and then discuss the two most interesting modules: Spring Aspect-Oriented Programming (AOP) and Inversion of Control (IOC) containers. A few examples will then be used to demonstrate the application of the IOC container in a typical application use case scenario. These examples will also serve as the basis for an expanded discussion later in this series, which describes how the Spring Framework implements AOP constructs through Spring AOP.