Dependency Injection
Dependency Injection is a specific form of Inversion of Control. It is a more formalized design pattern, whereby dependencies of an object are injected by an assembler. DI is generally performed in three major styles: constructor injection, property (setter) injection, or, sometimes, interface injection. IoC and DI are often used interchangeably.
DI offers several benefits, including effective decoupling of dependencies, cleaner code, and increased testability.
The Spring IoC container
The core Spring modules, spring-core, spring-beans, spring-context, spring-context-support, and spring-expression, together make up the core container. The Spring IoC container is designed as an implementation of the following interfaces:
org.springframework.beans.factory.BeanFactory ...
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