Detailed explanation of the technical principles of Swagger UI framework in the Java class library

Swagger is an open source framework for constructing, documentation and calling Web services.Swagger UI is the user interface used in document display and calling test in the Swagger framework.This article will introduce the technical principles of the Swagger UI framework in the Java class library, as well as some examples of Java code. The technical principles of Swagger UI are mainly divided into two parts: the generation and front -end display of the API document. First of all, the Swagger framework is a key information such as routing, input parameters, and output results in the Java code in the Java code.These annotations include `@api`,`@apiopration`, ``@apiparam`, etc., they are used to describe the basic information and operations of API.Code examples are as follows: @API (Value = "Example API", Description = "Demonstration of Swagger UI") @RestController @RequestMapping("/api") public class SampleController { @APIPERATION (VALUE = "Get user information", notes = "Get the basic information of users based on user ID") @GetMapping("/user/{id}") public User getUser(@PathVariable("id") Long id) { // Business logic for obtaining user information } } Next, the Swagger framework automatically generates the API documentation by scanning the annotation information in the Java library.Document descriptions are stored in JSON format, including the basic information, parameter descriptions, and return results of the API.These description information can be displayed by accessing the Swagger UI interface.Code examples are as follows: @Bean public Docket api() { return new Docket(DocumentationType.SWAGGER_2) .select() .apis(RequestHandlerSelectors.basePackage("com.example.api")) .build() .apiInfo(apiInfo()); } private ApiInfo apiInfo() { return new ApiInfoBuilder() .title ("Example API Document") .descripting ("Demonstration of Swagger UI") .version("1.0") .build(); } The generated API document can be displayed in the Swagger UI interface. Developers can view the API details in this interface and test the calls of the API.The interface can automatically generate the API test interface, providing functions such as parameter input and results display.The example screenshot is as follows: ! [Swagger UI Interface Example] (https://www.example.com/swagger_ui.png) To sum up, the technical principle of the Swagger UI framework in the Java class library is to describe the key information of the API through the Java annotation, and scan the annotation information to generate API document description through the framework.The document description is stored in JSON format, and the detailed information of the API is displayed by visiting the Swagger UI interface and the API call test. I hope this article will help you understand the technical principles of the Swagger UI framework in the Java class library!