springboot集成swagger 关于springboot集成swagger及knife4j的增强问题

<dependency>
  <groupId>io.springfox</groupId>
  <artifactId>springfox-swagger2</artifactId>
  <version>2.9.2</version>
</dependency>

 <dependency>
  <groupId>io.springfox</groupId>
  <artifactId>springfox-swagger-ui</artifactId>
  <version>2.9.2</version>
 </dependency>

package com.yf.exam.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.ArrayList;

@Configuration
@EnableSwagger2
public class SwaggerConfig {

  //配置了swagger的Docket 的 bean 实例
  @Bean
  public Docket docket(){
    return new Docket(DocumentationType.SWAGGER_2)
        .apiInfo(apiInfo());
  }
  //配置 swagger 信息 = apiInfo
  private ApiInfo apiInfo(){
    //作者信息
    Contact contact = new Contact("潇七", "https://www.xhost.vip/", "2278023068@qq.com");
    return new ApiInfo("API文档",
        "接口信息",
        "v1.0",
        
        contact,
        "Apache 2.0",
        "http://www.apache.org/licenses/LICENSE-2.0",
        new ArrayList()
    );
  }
}

<dependency>
      <groupId>com.github.xiaoymin</groupId>
      <artifactId>knife4j-spring-boot-starter</artifactId>
      <!--在引用时请在maven中央仓库搜索最新版本号-->
      <version>2.0.4</version>
 </dependency>