【Spring】——Spring Framework Introduction

        I want to review the Spring , so begin with a professional acticle in English . Let's see what is Spring

FrameWork，and why we need to work with this spring.

        Spring is a light weight and open source framework created by Rod Johnson in 2003. Spring is a complete and

a modular framework, i mean spring framework can be used for all layer implementations for a real time application

or spring can be used for the development of particular layer of a real time application unlike struts [ only for front

end related ] and hibernate [ only for database related ], but with spring we can develop all layers

• Spring framework is said to be a non-invasive means it doesn’t force a programmer to extend or implement their class from any predefined class or interface given by Spring API, in struts we used to extend Action Class right that’s why struts is said to be invasive
• In case of struts framework, it will forces the programmer that, the programmer class must extend from the base class provided by struts API
• Spring is light weight framework because of its POJO model
• Spring Framework made J2EE application development little easier, by introducing POJO model

       Spring having this much of demand because of the following 3 reasons….

• Simplicity
• Testability
• Loose Coupling

 

   Simplicity

      Spring framework is simple because as it is non-invasive, POJO and POJI model

 

   Testability

      Actually for writing the spring application, server [Container] is not mandatory, but for  struts applications we

need a server, and for EJB too.  If we want to test the application it may need lot of changes in the source and each

time we must restart the server to view the changes, which is little tedious and time taking but we can over come this

in Spring, for testing spring application server is not mandatory spring has it own container to run the applications.

      Spring can be used to develop any kind of java application, means we can develop starting from console

application to enterprise level application

 

    Loose Coupling

       In spring objects are loosely coupled,  this is the core concept of spring framework we will see in depth about

this loose coupling and how its differ from tight coupling.