Spring Basic Concepts

What is Spring?

Spring is an open source lightweight Java SE (Java Standard Version)/java EE (Java Enterprise Edition) Development application framework designed to simplify enterprise application development. 　

1. How does spring simplify Java development?

• Pojo-based lightweight and minimally invasive programming
• Loose coupling through dependency injection and an excuse for use
• Implement declarative programming based on facets and conventions
• Reduce boilerplate code with facets and modules

2. What are the benefits of using the spring framework?

• Light Weight: Spring is a lightweight, basic version of about 2MB.

• Control Inversion: Spring is loosely coupled through control inversion, and objects are given their dependencies rather than creating or locating dependent objects.

• Tangent-oriented programming (AOP): Spring supports tangent-oriented programming and separates application business logic from system services.

• Container: Spring contains and manages the life cycle and configuration of objects in your app.

• MVC Framework : Spring's web Framework is a well-designed framework and a good alternative to web frameworks.

• Transaction Management: Spring provides a continuous transaction management interface that can be extended up to the local transaction down to the global transaction (JTA).

• Exception Handling: Spring provides a convenient API for translating specific technology-related exceptions (such as those thrown by jdbc,hibernate or JDO) into a consistent unchecked exception.

The core idea of spring: (1) IOC (inversion of Control) (2) AOP (plane-oriented programming)

Dependency Injection (DI):

　　The object 's dependent objects are set at creation time by the third-party components in the system that are responsible for coordinating each object. objects do not have to create or manage their dependencies on their own.

Spring Basic Concepts