Grasp the expansion ability and custom function of the Swagger annotation framework in the Java library

Grasp the expansion ability and custom function of the Swagger annotation framework in the Java library Swagger is a popular API documentation tool that helps developers to automatically generate readable API documents.Swagger provides a wealth of annotation framework that can use these annotations in the Java library to achieve automatic documentation. However, the Swagger's annotation framework also has strong expansion capabilities and custom functions, enabling developers to customize the generation process of API documents according to their needs. A common expansion ability is the public configuration of custom Swagger.By expanding the SwaggerConfig class, developers can customize the global configuration of Swagger, such as the title, version, and description of the documentation.The following is an example: @Configuration @EnableSwagger2 public class SwaggerConfig { @Bean public Docket api() { return new Docket(DocumentationType.SWAGGER_2) .select() .apis(RequestHandlerSelectors.basePackage("com.example.api")) .paths(PathSelectors.any()) .build() .apiInfo(apiInfo()); } private ApiInfo apiInfo() { return new ApiInfoBuilder() .title("My API") .description("API documentation for my project") .version("1.0.0") .build(); } } In the above code, by customizing the SwaggerConfig class, we can set the title of the API document as "My API", described as "API DOCUMENTATION for My Project", and the version is "1.0.0". In addition to global configuration, the Swagger's annotation framework also supports custom annotations on the API interface method.For example, we can use the@Apioperation `annotation to describe the role of the API interface, and use the@APIPARAM` annotation to specify the parameters of the API interface.The following is an example: @RestController @RequestMapping("/users") @Api(tags = "User API") public class UserController { @GetMapping("/{id}") @ApiOperation("Get user by ID") public User getUserById(@PathVariable("id") @ApiParam("User ID") Long id) { // Obtain the logic of user information according to the user ID } } In the above code, we specified that this API interface belongs to "User API" through the `@API` annotation.On the `GetUserbyID" method, we use the `@Apioperation` annotation to describe the role of this method as" get user by ID ".At the same time, through the annotation of `@APIPARAM`, we designated the Chinese name of the` ID` parameter as "user ID". In addition to global configuration and method -level customization, the Swagger's annotation framework also supports the use of custom annotations to expand functions.For example, we can define an annotation `@APIIGNORE` to ignore a document generation used to ignore a API interface, as shown below: @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) @Documented @Inherited @ApiIgnore public @interface IgnoreApi { } Then, we can use the `@iporeapi` annotation on the method that needs to be ignored by the documentation: @RestController @RequestMapping("/users") @Api(tags = "User API") public class UserController { @GetMapping("/{id}") @IgnoreApi public User getUserById(@PathVariable("id") Long id) { // Obtain the logic of user information according to the user ID } } In the above code, through the note of the@ignoreapi`, we told the Swagger framework to ignore the API document that generates the `getUserbyID` method. In short, mastering the expansion ability and custom function of the Swagger annotation framework in the Java library can help us better customize and manage the API document generation process, and improve the readability and maintenance of API documents.Through global configuration, method level annotations and custom annotations, we can flexibly meet the needs of different projects.