Analysis of the technical principles of the Swagger UI framework in the Java class library
Swagger UI is an open source framework for designing, constructing, documentation, and using the RESTFUL Web service.It provides a simple and easy to use web interface that allows developers to visually browse and test their APIs.
The technical principle of Swagger UI is based on the Swagger specification.Swagger is a specification and framework for describing, constructing and controlling the RESTFUL Web service.It uses a document in JSON or YAML format to define the structure, request and response data format of the API, as well as the verification rules of the parameter.
In the Java library, the steps of using the Swagger UI framework are as follows:
1. Add Swagger UI dependencies: Add Swagger UI dependencies to the pom.xml file of the project, such as:
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>3.0.0</version>
</dependency>
2. Configure Swagger UI: Create a Swagger configuration class to specify the relevant information of API, such as:
@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();
}
}
In this configuration class, we designate the package path where the API is located and include all the requests in the document.
3. Enable Swagger UI: Add notes on the startup class of Spring Boot applications@Enableswagger2 to enable Swagger UI.
@SpringBootApplication
@EnableSwagger2
public class MyApp {
public static void main(String[] args) {
SpringApplication.run(MyApp.class, args);
}
}
After completing the above configuration, start the application and access http: // localhost: 8080/SWAGGER-UI.HTML, there will be a Swagger UI interface, showing the detailed information and testing tools of all APIs.
In addition, Swagger UI also supports adding custom notes to API documents to provide more detailed description information.Developers can use the Swagger UI annotation to specify the various attributes of the API, such as request methods, parameters, responses, etc.
Below is a simple Java code example, demonstrating how to use the Swagger UI framework to define an API interface:
@RestController
@RequestMapping("/api")
@Api(tags = "Hello API")
public class HelloController {
@GetMapping("/hello")
@ApiOperation("Say hello")
@ApiResponses({
@ApiResponse(code = 200, message = "OK"),
@ApiResponse(code = 500, message = "Internal server error")
})
public String hello() {
return "Hello, Swagger!";
}
}
In this example, we use the @RestController and @RequestMapping annotation to specify the path of the API.Define the label of the API with @Aapi annotation,@Apioperation annotation specifies the description of the API interface,@APIRESPONSES annotation specifies the possible response of the API.
In summary, the Swagger UI framework provides a simple and easy -to -use way to design, build, document, and test RESTFUL Web through using the Swagger specification and related Java annotations.Its technical principle is based on the SWAGGER specification. Documents using the JSON or YAML format to describe the structure and rules of the API.By configuring the related classes and annotations of Swagger UI, developers can quickly and intuitively create and use API documents.
