第一步：引入依赖

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

第二部配置

第三步：访问

http://localhost:8002/doc.html

import java.util.List;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;

import com.github.xiaoymin.knife4j.spring.annotations.EnableSwaggerBootstrapUi;
import com.google.common.collect.Lists;

import springfox.bean.validators.configuration.BeanValidatorPluginsConfiguration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.ParameterBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.schema.ModelRef;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Parameter;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

/**
 * @author:  zhangsy
 * @date: 2021-05-21 14:34
 * @description:
 */
@Configuration
@EnableSwagger2
@EnableSwaggerBootstrapUi
@Import(BeanValidatorPluginsConfiguration.class)
public class SwaggerConfig {

    @Bean
    public Docket defaultApi() {
        ParameterBuilder parameterBuilder = new ParameterBuilder();
        List<Parameter> parameters = Lists.newArrayList();
        parameterBuilder.name("sign").description("sign令牌").modelRef(new ModelRef("String"))
                .parameterType("header")
                .required(false).build();
        parameters.add(parameterBuilder.build());

        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.jinhui.community.modular"))
//                .apis(RequestHandlerSelectors.withMethodAnnotation(RestController.class))
                .paths(PathSelectors.any())
                .build().globalOperationParameters(parameters);
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("XXX后台接口文档")
                .description("#XXX RESTful APIs")
                .termsOfServiceUrl("www.xxxx.com")
                .contact("author")
                .version("1.0.0")
                .build();
    }
}