添加maven依赖：

<!-- swagger start -->
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger2</artifactId>
    <version>2.2.2</version>
</dependency>
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger-ui</artifactId>
    <version>2.2.2</version>
</dependency>
<dependency>
    <groupId>io.swagger</groupId>
    <artifactId>swagger-annotations</artifactId>
    <version>1.5.3</version>
</dependency>
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-staticdocs</artifactId>
    <version>2.2.2</version>
    <scope>test</scope>
</dependency>
<!-- swagger end -->

配置类：

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import springfox.documentation.RequestHandler;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration  
@EnableWebMvc  
@EnableSwagger2  
@ComponentScan  
/** 
 * 
 */  
public class SwaggerConfig extends WebMvcConfigurerAdapter {  
   /** 
    * Every Docket bean is picked up by the swagger-mvc framework - allowing for multiple 
    * swagger groups i.e. same code base multiple swagger resource listings. 
    */ 
   protected static Class<?> declaringClass(RequestHandler input) {
      return input.getHandlerMethod().getMethod().getDeclaringClass();
   }
    @Bean
    public Docket api() { 
       if (enableSwagger()) {
          return new Docket(DocumentationType.SWAGGER_2)  
                .apiInfo(apiInfo())
                .select()                                  
                .apis(RequestHandlerSelectors. any())              
                .paths(PathSelectors.any())                          
                .build();                                           
       } else {
          return new Docket(DocumentationType.SWAGGER_2)  
                .apiInfo(apiInfo())
                .select()                                  
                .apis(RequestHandlerSelectors.none())              
                .paths(PathSelectors.none())                          
                .build();                                           
       }
    }
    
    public boolean enableSwagger() {
       String useSwagger = "true";//ConfigProp.getProp("swagger.useSwagger");
       return "true".equals(useSwagger) ? true : false;
    }
    
    protected ApiInfo apiInfo() {
        return new ApiInfoBuilder().title("Mp API说明").description("")
                .version("1.0").build();
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
       if (enableSwagger()) {
          registry.addResourceHandler("swagger-ui.html")
          .addResourceLocations("classpath:/META-INF/resources/");
          registry.addResourceHandler("/webjars/**")
          .addResourceLocations("classpath:/META-INF/resources/webjars/");
       }
    }
}  

OK，然后编写测试接口：

import com.nfd.omega.model.JsonResponse;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;


@RestController
@Api(value = "测试接口", description = "测试接口")
public class TestController {

   @ApiOperation(value = "测试接口")
   @GetMapping("/")
   public String test() {
      return "hello word";
   }

   @ApiOperation(value = "测试接口 - hello")
   @GetMapping("/hello")
   public JsonResponse<String> hello() {
      return JsonResponse.createSuccessResponse("hello");
   }
}

启动项目，之后访问：http://localhost:8080/swagger-ui.html即可看到效果。