在ShiroConfig.java配置类中，找到shiroFilter方法，添加配置

        //swagger接口权限 开放
        filterMap.put("/swagger-ui.html", "anon");
        filterMap.put("/webjars/**", "anon");
        filterMap.put("/v2/**", "anon");
        filterMap.put("/swagger-resources/**", "anon");
        factory.setFilterChainDefinitionMap(filterMap);

完整的配置

    @Bean
    public ShiroFilterFactoryBean shiroFilter(SecurityManager securityManager) {
        ShiroFilterFactoryBean factory = new ShiroFilterFactoryBean();
        factory.setSecurityManager(securityManager);
        factory.setLoginUrl("/unauthorized");
        factory.setUnauthorizedUrl("/forbidden");
        Map<String, String> filterMap = InstanceUtil.newLinkedHashMap();
        for (String filter : filters.split("\\;")) {
            String[] keyValue = filter.split("\\=");
            filterMap.put(keyValue[0], keyValue[1]);
        }
        //swagger接口权限 开放
        filterMap.put("/swagger-ui.html", "anon");
        filterMap.put("/webjars/**", "anon");
        filterMap.put("/v2/**", "anon");
        filterMap.put("/swagger-resources/**", "anon");
        factory.setFilterChainDefinitionMap(filterMap);
        return factory;
    }