Introducton to Spring
Spring Framework history:
- Spring was developed in June,2003
- Initially developed by Rod Johnson.
- Latest version of Spring Framework version 4.1.6 released in Mar 2015.
What is Spring:
- Spring is Open Source Framework.
- Spring is Lightweight Application Framework.
- Spring is Simple framework.
- Spring is loosely coupled.
- Spring is a complete and a modular framework,because spring can be used in all layers of applications means front end(Spring MVC),Database(Spring JDBC,Spring ORM).
Why Spring:
- Why Spring come in to picture is because of EJB fails,EJB having multiple configuration files,it is affected on performance.so spring came up.
- Struts designed for Web Layer,like Other Frameworks also addressed specific layer,But Spring Framework provides solution to support all layers of application.
- Spring is non invasive framework,means Spring doesn't force to implement or extend any class from predefined class from Spring API.
Advantages of Spring:
- Spring is open source and lightweight framework.
- Spring is supports all layers including web layer.
- Easy for testing.
- Spring Supports POJO Model.
- POJO-Plain Old Java Object.
- Spring works in simple Java environment,because it is non,invasive.
- Spring can be integrated with any Application Server
- Spring simplifies J2EE development.
Spring Modules:
spring 1.x have seven modules,but in 2.x on wards we have 6 modules.
- Spring Core
- Spring DAO(Spring JDBC)
- Spring AOP(Ascept Orient Programming)
- Spring ORM(Spring Hibernate)
- Spring MVC
- Spring WEB
- Spring Context(J2EE)
Spring 2.x Modules:
from Spring 2.x ,Spring -WEB and Spring-MVC is combined.
from Spring 2.x ,Spring -WEB and Spring-MVC is combined.
- Spring Core
- Spring DAO(Spring JDBC)
- Spring AOP(Ascept Orient Programming)
- Spring ORM(Spring Hibernate)
- Spring WEB-MVC
- Spring Context(J2EE
- Spring is combination of various modules Seven well defined modules,Most of them are reasonably independent.
- Spring modules built using modular approach,you can use only required modules Each module is set of one or more JAR files
- Spring’s core module is “Inversion of Control”(IoC) also known as “Dependency Injection”.
- All other Spring modules are built on top of IoC.IoC is a Foundation or Container of Spring Framework.
- Spring core module is the base module for all modules.