What is Spring?

The Spring framework is an open-source Java application framework, which is based on two key principles: dependency injection and Inversion of Control. Spring has the ability to autowire the dependency at run time, which allows the developer to write loosely coupled code.

Spring framework uses metadata in the form of xml file or java annotations to create objects and identifies dependencies, thereby producing a ready-to-use application.

A typical web application is divided into three layers: web, business, and the data layer. These layers have objects that collaborate with each other to make the application work. These collaborations are called ...