Architecture:
Spring is well-organized architecture consisting of seven modules. Modules in the Spring
framework are:
Spring AOP:
One of the key
components of Spring is the AOP framework. AOP is used in Spring:
To provide declarative enterprise services, especially as
a replacement for EJB declarative services. The most important such service is
declarative transaction management, which builds on Spring's transaction
abstraction.
To allow users to implement custom aspects, complementing
their use of OOP with AOP
Spring ORM:
The ORM package is
related to the database access. It provides integration layers for popular
object-relational mapping APIs, including JDO, Hibernate and iBatis.
Spring Web:
The Spring Web
module is part of Spring?s web application development stack, which includes
Spring MVC.
Spring DAO:
The DAO (Data
Access Object) support in Spring is primarily for standardizing the data access
work using the technologies like JDBC, Hibernate or JDO.
Spring Context:
This package
builds on the beans package to add support for message sources and for the Observer design pattern, and the ability for application objects to obtain
resources using a consistent API.
Spring Web MVC:
This is the Module
which provides the MVC implementations for the web applications.
Spring Core:
The Core package
is the most import component of the Spring Framework.
This component provides the Dependency Injection
features. The BeanFactory provides a factory pattern which separates the dependencies like initialization, creation
and access of the objects from your actual program logic.
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| Spring Architecture |