<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>