content: package com.snow.gateway.config;
  
  import java.util.ArrayList;
  import java.util.List;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.cloud.gateway.config.GatewayProperties;
  import org.springframework.cloud.gateway.route.RouteLocator;
  import org.springframework.cloud.gateway.support.NameUtils;
  import org.springframework.context.annotation.Lazy;
  import org.springframework.stereotype.Component;
  import org.springframework.web.reactive.config.ResourceHandlerRegistry;
  import org.springframework.web.reactive.config.WebFluxConfigurer;
  import springfox.documentation.swagger.web.SwaggerResource;
  import springfox.documentation.swagger.web.SwaggerResourcesProvider;
  
  /**
   * 聚合系统接口
   *
   * @author snow
   */
  @Component
  public class SwaggerProvider implements SwaggerResourcesProvider, WebFluxConfigurer
  {
      /**
       * Swagger2默认的url后缀
       */
      public static final String SWAGGER2URL = "/v2/api-docs";
  
      /**
       * 网关路由
       */
      @Lazy
      @Autowired
      private RouteLocator routeLocator;
  
      @Autowired
      private GatewayProperties gatewayProperties;
  
      /**
       * 聚合其他服务接口
       *
       * @return
       */
      @Override
      public List<SwaggerResource> get()
      {
          List<SwaggerResource> resourceList = new ArrayList<>();
          List<String> routes = new ArrayList<>();
          // 获取网关中配置的route
          routeLocator.getRoutes().subscribe(route -> routes.add(route.getId()));
          gatewayProperties.getRoutes().stream()
                  .filter(routeDefinition -> routes
                          .contains(routeDefinition.getId()))
                  .forEach(routeDefinition -> routeDefinition.getPredicates().stream()
                          .filter(predicateDefinition -> "Path".equalsIgnoreCase(predicateDefinition.getName()))
                          .filter(predicateDefinition -> !"snow-auth".equalsIgnoreCase(routeDefinition.getId()))
                          .forEach(predicateDefinition -> resourceList
                                  .add(swaggerResource(routeDefinition.getId(), predicateDefinition.getArgs()
                                          .get(NameUtils.GENERATED_NAME_PREFIX + "0").replace("/**", SWAGGER2URL)))));
          return resourceList;
      }
  
      private SwaggerResource swaggerResource(String name, String location)
      {
          SwaggerResource swaggerResource = new SwaggerResource();
          swaggerResource.setName(name);
          swaggerResource.setLocation(location);
          swaggerResource.setSwaggerVersion("2.0");
          return swaggerResource;
      }
  
      @Override
      public void addResourceHandlers(ResourceHandlerRegistry registry)
      {
          /** swagger-ui 地址 */
          registry.addResourceHandler("/swagger-ui/**")
                  .addResourceLocations("classpath:/META-INF/resources/webjars/springfox-swagger-ui/");
      }
  }
  