spring Getting started with spring What is Spring Framework, why should we go for it ?

Example

Spring is a framework, which provides bunch of classes, by using this we don't need to write boiler plate logic in our code, so Spring provides an abstract layer on J2ee.

---

For Example in Simple JDBC Application programmer is responsible for

1. Loading the driver class
2. Creating the connection
3. Creating statement object
4. Handling the exceptions
5. Creating query
6. Executing query
7. Closing the connection

Which is treated as boilerplate code as every programmer write the same code. So for simplicity the framework takes care of boilerplate logic and the programmer has to write only business logic. So by using Spring framework we can develop projects rapidly with minimum lines of code, without any bug, the development cost and time also reduced.

So Why to choose Spring as struts is there

Strut is a framework which provide solution to web aspects only and struts is invasive in nature. Spring has many features over struts so we have to choose Spring.

1. Spring is Noninvasive in nature: That means you don't need to extend any classes or implement any interfaces to your class.
2. Spring is versatile: That means it can integrated with any existing technology in your project.
3. Spring provides end to end project development: That means we can develop all the modules like business layer, persistence layer.
4. Spring is light weight: That means if you want to work on particular module then , you don't need to learn complete spring, only learn that particular module(eg. Spring Jdbc, Spring DAO)
5. Spring supports dependency injection.
6. Spring supports multiple project development eg: Core java Application, Web Application, Distributed Application, Enterprise Application.
7. Spring supports Aspect oriented Programming for cross cutting concerns.

So finally we can say Spring is an alternative to Struts. But Spring is not a replacement of J2EE API, As Spring supplied classes internally uses J2EE API classes. Spring is a vast framework so it has divided into several modules. No module is dependent to another except Spring Core. Some Important modules are

1. Spring Core
2. Spring JDBC
3. Spring AOP
4. Spring Transaction
5. Spring ORM
6. Spring MVC