Unable to infer base url. This is common when using dynamic servlet registration or when the API is behind an API Gateway. The base url is the root of where all the swagger resources are served. For e.g. if the api is available at http://example.org/api/v2/api-docs then the base url is http://example.org/api/. Please enter the location manually: 

注意： 在application启动类中未定义@EnableSwagger2，因为使用的是zuul+swagger，而采用，springboot集成的swagger，都是导入的@EnableSwagger2Doc，所以才报错，去掉doc就行。

package com.fqyd;
import com.spring4all.swagger.EnableSwagger2Doc;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;
import springfox.documentation.swagger.web.SwaggerResource;
import springfox.documentation.swagger.web.SwaggerResourcesProvider;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.ArrayList;
import java.util.List;

/**
 * Description：
 * Author: wude
 * Date:  2019/7/25 16:49
 * Modified By:
 */
@SpringBootApplication
@EnableZuulProxy
@EnableEurekaClient
@EnableSwagger2
public class ZuulServiceImplApplication {
    public static void main(String[] args) {
        SpringApplication.run(ZuulServiceImplApplication.class,args);
    }

    @Component
    @Primary
    class DocumentationConfig implements SwaggerResourcesProvider {

        @Override
        public List<SwaggerResource> get() {
            List resources = new ArrayList();
            resources.add(swaggerResource("会员服务Api","/member/v2/api-docs","2.0"));
            resources.add(swaggerResource("订单服务Api","/order/v2/api-docs","2.0"));
            return resources;
        }

        private SwaggerResource swaggerResource(String name, String location, String version) {
            SwaggerResource swaggerResource = new SwaggerResource();
            swaggerResource.setName(name);
            swaggerResource.setLocation(location);
            swaggerResource.setSwaggerVersion(version);
            return swaggerResource;
        }
    }
}