Swagger UI framework in the technical principles of the Java library

The Swagger UI framework is an open source tool for generating interactive API documents.It can convert the code annotations in the Java library into a form of document that is easy to understand and use.The Swagger UI framework uses the following technical principles to achieve its functions: 1. Analysis: Swagger UI needs to analyze information related to API from the Java class library, such as the path, request method, parameter, etc. of API.It uses the reflex mechanism to scan the annotations in the Java class and extract these key information. The following is an example of a Java class using Swagger: @Api (tags = "User Management") // Define the label of the API @RESTCONTROLLLER // State as RESTController @RequestMapping ("/API/User") // Declaric the path of the API public class UserController { @APIPERATION ("Get user list") // Define the operation of API @Getmapping ("/list") // Define the request method and path of the API public List<User> getUserList() { // Return to the user list } @APIPERATION ("Create User") @PostMapping("/create") public void createUser(@RequestBody User user) { // Create the logic of users } } 2. Document generation: Swagger UI uses analysis of the annotation information to generate API documents.It can organize information such as the parsed path, request method, parameter and other information to easy -to -read formats, and generate document files in HTML or JSON.These document files can be displayed in the browser, and users can interact with Swagger UI to view the details of API and test interfaces in interactively. The following is an example of an API document generated using Swagger: json { "openapi": "3.0.0", "info": { "version": "1.0.0", "Title": "User Management" }, "paths": { "/api/user/list": { "get": { "Summary": "Get the user list", "responses": { "200": { "Description": "Successful return to the user list" } } } }, "/api/user/create": { "post": { "Summary": "Create users", "requestBody": { "description": "User object", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/User" } } } }, "responses": { "200": { "description": "Successful creation user" } } } } }, "components": { "schemas": { "User": { "type": "object", "properties": { "name": { "type": "string" }, "age": { "type": "integer" } } } } } } 3. Interface test: Swagger UI can not only generate API documents, but also provide the function of testing API in the browser.It can generate the corresponding input box for user input parameters according to the path, request method, parameter and other information defined in the annotation, and display the request results on the page.Users can directly test the API interfaces in the browser through the Swagger UI, which is convenient and fast. The above is the introduction of the technical principles of the Swagger UI framework in the Java class library. It uses technologies such as commentary analysis, document generation, and interface testing to achieve visual display and interactive testing of API in the Java library.This provides developers with a convenient way to understand and use APIs, which improves development efficiency and API's ease of use.