Swagger配置完之后無法訪問

在使用swagger配置后，一開始可以正常訪問，在后來打開鏈接的時候一直出現下面的彈框

 

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

折磨了一個小時，網上找了各種辦法，包括一些在springboot啟動類加上組件掃描等等，都不行

后來嘗試換了一下swagger的版本，之前是2.7.0，換成2.9.2現在可以正常訪問，但是原因我還不清楚，希望看到的大神可以給與幫助。

下面是我的配置：

/**
 * Swagger2API文檔的配置
 */
@Configuration
@EnableSwagger2
public class Swagger2Config {
    @Bean
    public Docket createRestApi(){
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.elazine.mall.admin.controller"))
                .paths(PathSelectors.any())
                .build()
                .securitySchemes(securitySchemes())
                .securityContexts(securityContexts());
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("mall后台系統")
                .description("mall后台模塊")
                .contact("macro")
                .version("1.0")
                .build();
    }

    private List<ApiKey> securitySchemes() {
        //設置請求頭信息
        List<ApiKey> result = new ArrayList<>();
        ApiKey apiKey = new ApiKey("Authorization", "Authorization", "header");
        result.add(apiKey);
        return result;
    }

    private List<SecurityContext> securityContexts() {
        //設置需要登錄認證的路徑
        List<SecurityContext> result = new ArrayList<>();
        result.add(getContextByPath("/brand/.*"));
        result.add(getContextByPath("/product/.*"));
        result.add(getContextByPath("/productCategory/.*"));
        return result;
    }

    private SecurityContext getContextByPath(String pathRegex){
        return SecurityContext.builder()
                .securityReferences(defaultAuth())
                .forPaths(PathSelectors.regex(pathRegex))
                .build();
    }

    private List<SecurityReference> defaultAuth() {
        List<SecurityReference> result = new ArrayList<>();
        AuthorizationScope authorizationScope = new AuthorizationScope("global", "accessEverything");
        AuthorizationScope[] authorizationScopes = new AuthorizationScope[1];
        authorizationScopes[0] = authorizationScope;
        result.add(new SecurityReference("Authorization", authorizationScopes));
        return result;
    }
}