How much do you solve about the spring frame?

Similar to the topic of your understanding of spring, it will be mentioned in many interviews.

Spring is meant to be in English. In the Java World, Spring is an open source application framework that is now very popular.

The Spring framework is a layered architecture consisting of 7 well-defined modules. The Spring module is built on top of the core container, and the core container defines how the beans are created, configured, and managed.

Each module (or component) that makes up the Spring framework can exist separately or be implemented in conjunction with one or more other modules. The functions of each module are as follows:

1. 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. The beanfactory uses the inversion of control (IOC) pattern to separate the application's configuration and dependency specifications from the actual application code.

2. Spring Context: The spring context is a configuration file that provides contextual information to the spring framework. The Spring context includes enterprise services such as JNDI, EJB, e-mail, internationalization, checksum scheduling.

3. Spring AOP: With the configuration management feature, the Spring AOP module integrates aspect-oriented programming functionality directly into the spring framework. Therefore, it is easy to enable any object managed by the Spring framework to 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.

4. The 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 number of exception codes that need to be written (such as opening and closing connections). Spring DAO's JDBC-oriented exception conforms to the common DAO exception hierarchy.

5. The Spring orm:spring Framework inserts several ORM frameworks, providing ORM object-relational tools, including JDO, Hibernate, and IBatis SQL Map. All of these conform to Spring's common transaction and DAO exception hierarchies.

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

7. Spring MVC Framework: The MVC Framework is a full-featured MVC implementation of building WEB applications. With the policy interface, the MVC framework becomes highly configurable, and MVC accommodates a large number of view technologies, including JSP, Velocity, Tiles, IText, and POI.

The functionality of the Spring framework can be used in any Java EE server, and most features are also available in an out-of-management environment. The core point of Spring is to support reusable business and data access objects that are not tied to a particular Java EE service. There is no doubt that such objects can be reused across different Java EE environments (Web or EJB), standalone applications, and test environments.

IOC and AOP

The basic concept of control reversal mode (also known as dependency intervention) is that you do not create objects, but describe how they are created. The code does not directly connect to objects and services, but describes in the configuration file which component requires which service. Containers (which are IOC containers in the Spring framework) are responsible for linking these together.

In a typical IOC scenario, the container creates all the objects and sets the necessary properties to connect them together, deciding when to invoke the method.

AOP allows developers to create non-behavioral concerns, called crosscutting concerns, and insert them into application code. With AOP, public services (such as logs, persistence, transactions, and so on) can be decomposed into facets and applied to domain objects without increasing the complexity of the object model of the domain object.
IOC allows you to create an application environment where objects can be constructed, and then pass their collaboration objects to those objects. As the word inversion shows, the IOC is like the reverse JNDI. Not using a bunch of abstract factories, service locators, single elements (singleton), and direct constructs (straight construction), each object is constructed with its collaboration objects. Therefore, the collaboration object (collaborator) is managed by the container.

Spring even an AOP framework, is also an IOC container. The best part of Spring is that it helps you replace objects. With Spring, as long as you add dependencies (collaboration objects) with the JavaBean property and configuration file, you can easily replace collaboration objects with similar interfaces when you need them.

The core functionality of the Spring Framework is applicable in any Java application. In the Web application based on the Java Enterprise platform, a great deal of expansion and improvement can be formed. To this end, spring has been widely welcomed and recognized by many companies as a strategic and important framework.

As one of the hottest popular frameworks, spring has been successfully used in the development of various systems. A good understanding of some of its concepts and composition, whether for future development work or to meet the interview, there are great benefits. Because the benefits of spring are obvious, it greatly simplifies the development process of complex systems and makes the system more modular.

How much do you solve about the spring frame?