Detailed explanation of Thundr framework technical principles in the Java class library

The Thundr framework is a Java -based lightweight web application development framework that can quickly build a flexible and scalable web application.The technical principle of the Thundr framework is based on the MVC (Model-View-Controller) architecture mode. MVC is a design pattern that divides the application into three parts: models, views, and controllers.The model is responsible for processing the data logic of the application. The view is responsible for presenting the data of the model and displaying it to the user. The controller is responsible for handling the user's request and calling the corresponding model to perform business logic. The Thundr framework uses the Routing mechanism to process URL's request mapping.The routing processs the request by mapping different URLs to different controllers, thereby achieving flexible URL routing control. The Thundr framework also supports dependencies injection and INVERSION of Control.Dependent injection is a method of managing the dependencies of objects to external containers. It can simplify the development and maintenance of the application.Reverse control means that the responsibility of the control program is borne by the framework. Developers only need to provide the corresponding extension or configuration. The framework will automatically call these extensions to complete specific logic. In the Thundr framework, the controller is the main part of the developer interacts with the framework.Developers need to create a controller class and define different methods in the class to process different URL requests.Each controller method corresponds to a URL and is mailed through the routing mechanism.In the controller method, developers can process the request according to business needs, access the database, call other services, etc. In terms of programming code and related configuration, the Thundr framework uses Annotion and simple configuration methods.Developers can use annotations to mark the controller class, controller methods, routing mapping, etc., and use the configuration file to perform some basic configurations of the framework, such as database connection, cache settings, etc. Below is a simple Thundr framework sample code: @Controller public class UserController { @Inject private UserService userService; @Route("/") public View home() { List<User> users = userService.getAllUsers(); return new View("home").withModel("users", users); } @Route("/user/{id}") public View getUser(@Param("id") String id) { User user = userService.getUserById(id); return new View("user").withModel("user", user); } } In the above example, UserController is a controller class that uses @Controller annotations to mark.Through @Inject annotations, UserService is injected into UserController, and developers can use the service to process related business logic. Two methods are defined in the controller, and the requests of the root path ("/") and the user details page ("/user/{id}") are processed.These urls are mapping through @route annotations.In the Home method, obtain all users through userService and pass the user list to a view rendering called "Home".In the getUser method, the detailed information of the corresponding user is obtained according to the {id} parameter, and the user object is passed to the view rendering named "User". The above is the technical principle and related programming code example of the Thundr framework.This framework can help developers quickly build flexible and scalable Java web applications by using the MVC architecture, routing mechanism, dependency injection and reversal control.