FilterHolder.java 文件源码

private String readAnnotatedFilterName() {
    if (isAnnotated()) {
        WebFilter regAnnotation = filter.getClass().getAnnotation(WebFilter.class);
        if (!"".equals(regAnnotation.filterName().trim())) {
            return regAnnotation.filterName();
        } else {
            return filter.getClass().getName();
        }
    } else {
        return null;
    }
}