无题

Listener

开调试

Listener在上面获取的

public void addApplicationEventListener(Object listener) {
    applicationEventListenersList.add(listener);
}

调用context的方法加

获取context,

<%
    Field reqF = request.getClass().getDeclaredField("request");
    reqF.setAccessible(true);
    Request req = (Request) reqF.get(request);
    StandardContext context = (StandardContext) req.getContext();
%>

jsp直接有context

Filter

按栈帧遍历

主要看这三个filter

filterConfigs需要 filter和filterDef
filterDefs需要filter,filterClass,filterName
filterMaps必要的属性为dispatcherMapping,filterName,urlPatterns