1.Spring Overview
What is 1.1.Spring
Spring: Spring is a layered JavaSE / EE application-Stack Full 轻量级开源框架, which 以IOC（控制反转）和AOP（面向切面编程）为内核provides the presentation layer and SpringMVC Spring JDBC and transaction management services layer, and many other enterprise applications technology persistence layer, but also the integration of many well-known open source world tripartite frameworks and libraries, has become the largest enterprise applications using open source frameworks JavaEE
1.2.Spring features
Spring is called EE development 一站式框架, there are solutions for each layer EE development:
- WEB layer: SpringMVC
- Service Layer: Spring's Bean management, Spring declarative transaction
- DAO layer: Spring's JDBC templates, Spring's ORM module
1.3. Spring Architecture
1.4.Spring Development Kit
- docs: Spring in the development of norms and API
- libs: Spring into the jar and the development of source code
- schema: Constraints Spring configuration file
IOC's entry 2.Spring
2.1. Coupling and decoupling between programs
耦合: Simply understood as the dependencies between procedures, including类之间的依赖and方法间的依赖解耦合: Reduce the dependencies between procedures, dependencies between program can not be completely eliminated but can be reduced as much as possible. The actual development should do编译期间不依赖，运行期间才依赖
2.2.Spring of IOC
IOC：