mall-tiny-security DynamicSecurityFilter 每个请求会执行两次

https://GitHub.com/macrozheng/mall-learning/tree/master/ DynamicSecurityFilter 是否加上了重复比较？ private static final String FILTER_APPLIED = "__spring_security_demoFilter_filterApplied"; if (servletRequest.getAttribute(FILTER_APPLIED) != null) { filterChain.doFilter(servletRequest, servletResponse); return; } // 执行某些操作 servletRequest.setAttribute(FILTER_APPLIED, true); filterChain.doFilter(servletRequest, servletResponse);