shiro学习20-shiro提供的filter-PathMatchingFilter类

这个类也是AdviceFilter的实现类，我们先看看他的preHandle方法

protected boolean preHandle(ServletRequest request, ServletResponse response) throws Exception {
        if (this.appliedPaths == null || this.appliedPaths.isEmpty()) {
            if (log.isTraceEnabled()) {
                log.trace("appliedPaths property is null or empty.  This Filter will passthrough immediately.");
            }
            return true;
        }
        for (String path : this.appliedPaths.keySet()) {
            // If the path does match, then pass on to the subclass implementation for specific checks
            //(first match 'wins'):
            if (pathsMatch(path, request)