what is spring mvc

spring mvc is a Java-based open source web application framework that provides a model, view, controller architecture pattern to build flexible and scalable web applications. Whether it is a large enterprise-level application or a small personal project, Spring MVC is an ideal choice. Its modular design and loosely coupled architecture allow developers to easily extend and customize applications, improving development efficiency and code maintainability. sex.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Spring MVC is a Java-based open source web application framework that is part of the Spring framework. It provides a Model-View-Controller (MVC) architectural pattern to build flexible, scalable web applications.

First, let us understand the MVC architecture pattern. MVC is a software design pattern that divides an application into three main parts: model, view, and controller. Models represent the application's data and business logic, views are used to present data to the user, and controllers handle user requests and update the model and views accordingly.

In Spring MVC, the model represents the data and business logic of the application. It can be a simple Java object or a complex data structure. The model interacts with the database, handles data addition, deletion, modification and query operations, and passes the results to the view.

View is the presentation layer of the user interface. It is responsible for rendering the data in the model into HTML, JSON, XML and other formats and displaying it to the user. Spring MVC supports multiple view technologies, including JSP, Thymeleaf, Freemarker, etc.

The controller is the central processor of the application. It receives requests from users and calls the corresponding processing method based on the content of the request. The controller is responsible for processing user input, updating the model's state, and selecting the appropriate view to render the response.

Spring MVC uses DispatcherServlet to coordinate the interaction between models, views and controllers. It is the core component of the Spring MVC framework and is responsible for dispatching requests to the appropriate controllers and returning responses to the client. DispatcherServlet also handles exceptions, internationalization, file upload and other functions.

Spring MVC provides many features and capabilities that enable developers to quickly build reliable web applications. Some of the features include:

1. Annotation-driven development: Spring MVC supports the use of annotations to configure controllers, request mapping, request parameter binding, etc. This simplifies the development process and reduces the number and complexity of configuration files.

2. Data binding and validation: Spring MVC provides data binding and validation functions, allowing developers to easily bind user-submitted data to the model and verify the validity of the data.

3. Interceptor: Spring MVC's interceptor allows developers to perform custom processing logic before or after the request reaches the controller. This is useful for implementing authentication, logging, performance monitoring, etc.

4. Internationalization and localization: Spring MVC supports internationalization and localization, allowing developers to provide different views and messages according to the user's language and region.

5.RESTful Web service support: Spring MVC provides native support for RESTful Web services, allowing developers to easily build and manage RESTful APIs.

6. Test support: Spring MVC provides rich test support, including unit testing, integration testing and end-to-end testing. This allows developers to write reliable automated tests that ensure application quality and stability.

In summary, Spring MVC is a powerful web application framework that provides a wealth of functions and features that enable developers to quickly build reliable and efficient web applications. Whether it is a large enterprise-level application or a small personal project, Spring MVC is an ideal choice. Its modular design and loosely coupled architecture allow developers to easily extend and customize applications, improving development efficiency and code maintainability.

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