1.导入依赖

        <dependency><groupId>com.github.xiaoymin</groupId><artifactId>knife4j-spring-boot-starter</artifactId><version>${knife4j-spring-boot.version}</version></dependency>

2.再配置文件中打开日志

	knife4j.enable=true

3.写配置文件

package com.example.studytest.config;
import com.github.xiaoymin.knife4j.spring.extension.OpenApiExtensionResolver;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
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.EnableSwagger2WebMvc;/**
/*** 上面的java提供参考* Knife4j配置类** @author * @version 2.0*/
@Slf4j
@Configuration
@EnableSwagger2WebMvc
public class Knife4jConfiguration {/*** 【重要】指定Controller包路径*/private static final String BASE_PACKAGE = "com.example";/*** 组名*/private static final String GROUP_NAME = "学习测试";/*** 主机名*/private static final String HOST = "http://localhost";/*** 标题*/private static final String TITLE = "学习测试-在线API文档";/*** 简介*/private static final String DESCRIPTION = "学习测试-在线API文档";/*** 服务条款URL*/private static final String TERMS_OF_SERVICE_URL = "http://www.apache.org/licenses/LICENSE-2.0";/*** 联系人*/private static final String CONTACT_NAME = "学习测试";/*** 联系网址*/private static final String CONTACT_URL = "http://www.baipiaozhong.com";/*** 联系邮箱*/private static final String CONTACT_EMAIL = "helloxiaoxiaobai@163.com";/*** 版本号*/private static final String VERSION = "2.0";@Autowiredprivate OpenApiExtensionResolver openApiExtensionResolver;public Knife4jConfiguration() {log.debug("创建配置类对象：Knife4jConfiguration");}@Beanpublic Docket docket() {return new Docket(DocumentationType.SWAGGER_2).host(HOST).apiInfo(apiInfo()).groupName(GROUP_NAME).select().apis(RequestHandlerSelectors.basePackage(BASE_PACKAGE)).paths(PathSelectors.any()).build().extensions(openApiExtensionResolver.buildExtensions(GROUP_NAME));}private ApiInfo apiInfo() {return new ApiInfoBuilder().title(TITLE).description(DESCRIPTION).termsOfServiceUrl(TERMS_OF_SERVICE_URL).contact(new Contact(CONTACT_NAME, CONTACT_URL, CONTACT_EMAIL)).version(VERSION).build();}}

4.成功运行。