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This article mainly introduces "what is spring, spring MVC and spring Boot". In daily operation, I believe many people have doubts about what spring, spring MVC and spring Boot are. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the questions of "what are spring, spring MVC and spring Boot?" Next, please follow the editor to study!

Spring is an "engine"

Spring MVC is a MVC framework based on Spring

Spring Boot is a set of rapid development integration packages based on Spring4 conditional registration.

Spring initially decoupled application components using "factory mode" (DI) and "agent mode" (AOP)

The Spring framework is a hierarchical architecture consisting of seven well-defined modules.

The Spring module is built on top of the core container, which defines how the bean is created, configured, and managed; each module (or component) that makes up the Spring framework can exist independently or jointly with one or more other modules.

01. Core container: the core container provides the basic functions of the Spring framework. The main component of the core container is BeanFactory, which is the implementation of the factory pattern. BeanFactory uses the inversion of Control (IOC) mode to separate the application's configuration and dependency specifications from the actual application code.

02.Spring context: the Spring context is a configuration file that provides context information to the Spring framework. The Spring context includes enterprise services such as JNDI, EJB, email, internationalization, checksum and scheduling capabilities.

03.Spring AOP: through the configuration management feature, the Spring AOP module integrates aspect-oriented programming capabilities directly into the Spring framework. Therefore, you can easily make any object managed by the Spring framework support AOP. The Spring AOP module provides transaction management services for objects in Spring-based applications. By using Spring AOP, you can integrate declarative transaction management into your application without relying on EJB components.

The 04.Spring DAO:JDBC DAO abstraction layer provides a meaningful exception hierarchy that can be used to manage exception handling and error messages thrown by different database vendors. The exception hierarchy simplifies error handling and greatly reduces the amount of exception code that needs to be written (such as opening and closing connections). Spring DAO's JDBC-oriented exceptions follow the general DAO exception hierarchy.

The 05.Spring ORM:Spring framework inserts several ORM frameworks, providing object-relational tools for ORM, including JDO, Hibernate, and iBatis SQL Map. All of this follows Spring's generic transaction and DAO exception hierarchy.

06.Spring Web module: the Web context module is built on top of the application context module, providing context for Web-based applications. Therefore, the Spring framework supports integration with Jakarta Struts. The Web module also simplifies the work of handling multipart requests and binding request parameters to domain objects.

07.Spring MVC framework: the MVC framework is a full-featured MVC implementation for building Web applications. Through the policy interface, the MVC framework becomes highly configurable, and MVC hosts a number of view technologies, including JSP, Velocity, Tiles, iText, and POI.

The functionality of the Spring framework can be used in any J2EE server, and most of the features also apply to unmanaged environments. The core point of Spring is to support reusable business and data access objects that are not bound to specific J2EE services. There is no doubt that such objects can be reused between different J2EE environments (Web or EJB), stand-alone applications, and test environments.

At this point, the study of "what are spring, spring MVC and spring Boot" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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