springboot shiro这行是什么意思？

Question

    public ShiroFilterFactoryBean shiroFilterFactoryBean(SecurityManager securityManager) {
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        // 设置securityManager
        shiroFilterFactoryBean.setSecurityManager(securityManager);
        // 登录的url
        shiroFilterFactoryBean.setLoginUrl("/login");
        // 登录成功后跳转的url
        shiroFilterFactoryBean.setSuccessUrl("/index");
        // 未授权url
        shiroFilterFactoryBean.setUnauthorizedUrl("/403");

        LinkedHashMap<String, String> filterChain = new LinkedHashMap<>();

        // 定义filterChain，静态资源不拦截
        filterChain.put("/css/**", "anon");
        filterChain.put("/js/**", "anon");
        filterChain.put("/fonts/**", "anon");
        filterChain.put("/img/**", "anon");
        filterChain.put("/druid/**", "anon");
        filterChain.put("/login", "anon");
        // 配置退出过滤器，其中具体的退出代码Shiro已经替我们实现了
        filterChain.put("/logout/**", "logout");
        filterChain.put("/", "anon");
        // 除上以外所有url都必须认证通过才可以访问，未通过认证自动访问LoginUrl
        filterChain.put("/**", "authc");

        shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChain);
        return shiroFilterFactoryBean;
    }

这个filterChain.put("/", "anon");配置是什么意思

Answer 1

就是对根路径不进行拦截。直接放行