• • Spring is open source and a light weight framework developed by Rod Johnson in 2003.
• • Spring is initial released by INTERFACE21 and now it removed as SpringSouce.org
• • Spring is a modular framework.
• • Spring framework can be used real time application.
• • Spring is light weight framework because of its POJO model
• • Spring framework is non-invasive that means there is no need to extend or implement their class from any predefined class or interface given by Spring API.
• • Spring Framework made J2EE application development very easy.

Note:

POJO is usually used to describe a class that doesn't need to be a subclass of anything, or implement specific interfaces, or follow a specific pattern. POJO = Plain Old Java Object. It has properties, getters and setters for respective properties.

Advantages