SpringBoot2.3.1集成Knife4j接口文档

首先要查看项目中pom文件里面有没有swagger和knife4j的依赖，如果有的话删除，加入以下依赖

<!-- swagger -->
		<dependency>
			<groupId>com.github.xiaoymin</groupId>
			<artifactId>knife4j-openapi3-spring-boot-starter</artifactId>
			<version>${knife4j.version}</version>
			<exclusions>
				<exclusion>
					<groupId>org.springdoc</groupId>
					<artifactId>springdoc-openapi-webmvc-core</artifactId>
				</exclusion>
				<exclusion>
					<groupId>io.springfox</groupId>
					<artifactId>*</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springdoc</groupId>
			<artifactId>springdoc-openapi-ui</artifactId>
			<version>${springdoc.version}</version>
		</dependency>

	</dependencies>

然后在下面文件中加入配置初始化语句:

#################### æ¥å£ææ¡£éç½® ####################
springdoc.api-docs.enabled= true
springdoc.api-docs.path= /v3/api-docs
springdoc.swagger-ui.enabled= true
springdoc.swagger-ui.path= /swagger-ui
springdoc.default-flat-param-object= true

knife4j.enable= false
knife4j.setting.language= zh_cn

新建swagger的config类，内容如下：

SwaggerProperties

package com.todod.config.swagger;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;

import javax.validation.constraints.NotEmpty;

/**
 * Swagger 配置属性
 *
 * @author admin
 */
@ConfigurationProperties("base.swagger")
@Data
public class SwaggerProperties {

    /**
     * 标题
     */
    @NotEmpty(message = "标题不能为空")
    private String title;
    /**
     * 描述
     */
    @NotEmpty(message = "描述不能为空")
    private String description;
    /**
     * 作者
     */
    @NotEmpty(message = "作者不能为空")
    private String author;
    /**
     * 版本
     */
    @NotEmpty(message = "版本不能为空")
    private String version;
    /**
     * url
     */
    @NotEmpty(message = "扫描的 package 不能为空")
    private String url;
    /**
     * email
     */
    @NotEmpty(message = "扫描的 email 不能为空")
    private String email;

    /**
     * license
     */
    @NotEmpty(message = "扫描的 license 不能为空")
    private String license;

    /**
     * license-url
     */
    @NotEmpty(message = "扫描的 license-url 不能为空")
    private String licenseUrl;

}

BaseSwaggerAutoConfiguration

package com.todod.config.swagger;

import io.swagger.v3.oas.models.Components;
import io.swagger.v3.oas.models.OpenAPI;
import io.swagger.v3.oas.models.info.Contact;
import io.swagger.v3.oas.models.info.Info;
import io.swagger.v3.oas.models.info.License;
import io.swagger.v3.oas.models.media.IntegerSchema;
import io.swagger.v3.oas.models.media.StringSchema;
import io.swagger.v3.oas.models.parameters.Parameter;
import io.swagger.v3.oas.models.security.SecurityRequirement;
import io.swagger.v3.oas.models.security.SecurityScheme;
import org.springdoc.core.*;
import org.springdoc.core.customizers.OpenApiBuilderCustomizer;
import org.springdoc.core.customizers.ServerBaseUrlCustomizer;
import org.springdoc.core.providers.JavadocProvider;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.http.HttpHeaders;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;

/**
 * Swagger 自动配置类，基于 OpenAPI + Springdoc 实现。
 *
 * 友情提示：
 * 1. Springdoc 文档地址：<a href="https://github.com/springdoc/springdoc-openapi">仓库</a>
 * 2. Swagger 规范，于 2015 更名为 OpenAPI 规范，本质是一个东西
 *
 * @author admin
 */
@Configuration
@ConditionalOnClass({OpenAPI.class})
@EnableConfigurationProperties(SwaggerProperties.class)
@ConditionalOnProperty(prefix = "springdoc.api-docs", name = "enabled", havingValue = "true", matchIfMissing = true) // 设置为 false 时，禁用
public class BaseSwaggerAutoConfiguration {

    public static final String HEADER_TENANT_ID = "tenant-id";

    // ========== 全局 OpenAPI 配置 ==========

    @Bean
    public OpenAPI createApi(SwaggerProperties properties) {
        Map<String, SecurityScheme> securitySchemas = buildSecuritySchemes();
        OpenAPI openAPI = new OpenAPI()
                // 接口信息
                .info(buildInfo(properties))
                // 接口安全配置
                .components(new Components().securitySchemes(securitySchemas))
                .addSecurityItem(new SecurityRequirement().addList(HttpHeaders.AUTHORIZATION));
        securitySchemas.keySet().forEach(key -> openAPI.addSecurityItem(new SecurityRequirement().addList(key)));
        return openAPI;
    }

    /**
     * API 摘要信息
     */
    private Info buildInfo(SwaggerProperties properties) {
        return new Info()
                .title(properties.getTitle())
                .description(properties.getDescription())
                .version(properties.getVersion())
                .contact(new Contact().name(properties.getAuthor()).url(properties.getUrl()).email(properties.getEmail()))
                .license(new License().name(properties.getLicense()).url(properties.getLicenseUrl()));
    }

    /**
     * 安全模式，这里配置通过请求头 Authorization 传递 token 参数
     */
    private Map<String, SecurityScheme> buildSecuritySchemes() {
        Map<String, SecurityScheme> securitySchemes = new HashMap<>();
        SecurityScheme securityScheme = new SecurityScheme()
                .type(SecurityScheme.Type.APIKEY) // 类型
                .name(HttpHeaders.AUTHORIZATION) // 请求头的 name
                .in(SecurityScheme.In.HEADER); // token 所在位置
        securitySchemes.put(HttpHeaders.AUTHORIZATION, securityScheme);
        return securitySchemes;
    }

    /**
     * 自定义 OpenAPI 处理器
     */
    @Bean
    @Primary // 目的：以我们创建的 OpenAPIService Bean 为主，避免一键改包后，启动报错！
    public OpenAPIService openApiBuilder(Optional<OpenAPI> openAPI,
                                         SecurityService securityParser,
                                         SpringDocConfigProperties springDocConfigProperties,
                                         PropertyResolverUtils propertyResolverUtils,
                                         Optional<List<OpenApiBuilderCustomizer>> openApiBuilderCustomizers,
                                         Optional<List<ServerBaseUrlCustomizer>> serverBaseUrlCustomizers,
                                         Optional<JavadocProvider> javadocProvider) {
        return new OpenAPIService(openAPI, securityParser, springDocConfigProperties,
                propertyResolverUtils, openApiBuilderCustomizers, serverBaseUrlCustomizers, javadocProvider);
    }

    // ========== 分组 OpenAPI 配置 ==========

    /**
     * 所有模块的 API 分组
     */
    @Bean
    public GroupedOpenApi allGroupedOpenApi() {
        return buildGroupedOpenApi("all", "");
    }

    public static GroupedOpenApi buildGroupedOpenApi(String group) {
        return buildGroupedOpenApi(group, group);
    }

    public static GroupedOpenApi buildGroupedOpenApi(String group, String path) {
        return GroupedOpenApi.builder()
                .group(group)
                .pathsToMatch("/admin-api/" + path + "/**", "/" + path + "/**")
                .addOperationCustomizer((operation, handlerMethod) -> operation
                        .addParametersItem(buildTenantHeaderParameter())
                        .addParametersItem(buildSecurityHeaderParameter()))
                .build();
    }

    /**
     * 构建 Tenant 租户编号请求头参数
     *
     * @return 多租户参数
     */
    private static Parameter buildTenantHeaderParameter() {
        return new Parameter()
                .name(HEADER_TENANT_ID) // header 名
                .description("租户编号") // 描述
                .in(String.valueOf(SecurityScheme.In.HEADER)) // 请求 header
                .schema(new IntegerSchema()._default(1L).name(HEADER_TENANT_ID).description("租户编号")); // 默认：使用租户编号为 1
    }

    /**
     * 构建 Authorization 认证请求头参数
     *
     * 解决 Knife4j <a href="https://gitee.com/xiaoym/knife4j/issues/I69QBU">Authorize 未生效，请求header里未包含参数</a>
     *
     * @return 认证参数
     */
    private static Parameter buildSecurityHeaderParameter() {
        return new Parameter()
                .name(HttpHeaders.AUTHORIZATION) // header 名
                .description("认证 Token") // 描述
                .in(String.valueOf(SecurityScheme.In.HEADER)) // 请求 header
                .schema(new StringSchema()._default("Bearer test1").name(HEADER_TENANT_ID).description("认证 Token")); // 默认：使用用户编号为 1
    }

}

新建WebAppConfig类来控制./doc.html可以访问

代码如下：

package com.todod.config;

import com.todod.interceptor.LoginInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.CacheControl;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.concurrent.TimeUnit;

@Configuration
public class WebAppConfig implements WebMvcConfigurer {
	@Value("${file.upload.path}")
	private String uploadPath; // 文件路径
	@Value("${file.upload.mapping}")
	private String showPath; // 映射路径

	@Autowired
	private LoginInterceptor loginInterceptor;

	/**
	 * interceptor配置
	 */
	@Override
	public void addInterceptors(InterceptorRegistry registry) {
		registry.addInterceptor(loginInterceptor)
				// 添加需要验证登录用户操作权限的请求
				.addPathPatterns("/**")
				// 排除不需要验证登录用户操作权限的请求
				.excludePathPatterns("/user/login/**", "/user/logout/**","/apiDemo/doGet/**","/ltcloud/user/getAllUser","/ltcloud/frequency/getFrequencyById","/empower/**");

	}

	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		String a = showPath + "**";
		String b = "file:" + uploadPath;
		registry.addResourceHandler(a)
				.addResourceLocations(b).
				setCacheControl(CacheControl.maxAge(2, TimeUnit.DAYS));
		registry.addResourceHandler("/doc.html").addResourceLocations("classpath:/META-INF/resources/");
		registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
	}
}

前端：

<template>
  <div>
    <i-frame v-if="!loading" :src="url" />
  </div>
</template>
<script>
import iFrame from "@/components/iFrame/index";
import { getConfigKey } from "@/api/infra/config";
export default {
  name: "InfraSwagger",
  components: { iFrame },
  data() {
    return {
      url: process.env.VUE_APP_BASE_API + "doc.html", // Knife4j UI
      loading: true
    };
  },
  created() {

      this.url =process.env.VUE_APP_BASE_API + "doc.html"
      this.loading = false;
  
  }
};
</script>

到此配置完毕，范围localhost:后端端口/doc.html

注：

1.BaseSwaggerAutoConfiguration类中的buildGroupedOpenApi方法可以控制显示哪些controller里的接口：

public static GroupedOpenApi buildGroupedOpenApi(String group, String path) {
        return GroupedOpenApi.builder()
                .group(group)
                .pathsToMatch("/admin-api/" + path + "/**", "/" + path + "/**")
                .addOperationCustomizer((operation, handlerMethod) -> operation
                        .addParametersItem(buildTenantHeaderParameter())
                        .addParametersItem(buildSecurityHeaderParameter()))
                .build();
    }