struts2 FilterDispatcher

1:在FilterDispatcher 类中有属性

  private static boolean serveStatic;

 private static ActionMapper actionMapper;

这两个属性通过容器Container进行注入的

struts-default.xml中有<bean class="org.apache.struts2.dispatcher.FilterDispatcher" static="true" />这样一句

就是注入static 属性.

然后在doFilter方法中去找访问的url有没有相应的ActionMapping(存放Action的)

如果没有的话再去找静态资源,在init方法中有        

String packages = "org.apache.struts2.static template org.apache.struts2.interceptor.debugging";

也可以自己在web.xml中配置packages属性

然后就可以在浏览器中  访问处于org.apache.struts2.static,template,org.apache.struts2.interceptor.debugging

,web.xml中配置packages属性下访问资源,但是uri要以struts开始

比如我要访问org.apache.struts2.static下的optiontransferselect.js(jar文件解压就能看见)

/struts/optiontransferselect.js就能下载这个js

2:

finally {            try {                ActionContextCleanUp.cleanUp(req);            } finally {                UtilTimerStack.pop(timerKey);            }        }

ActionContextCleanUp的doFilter方法

finally {                int counterVal = ((Integer)request.getAttribute(COUNTER)).intValue();                counterVal -= 1;                request.setAttribute(COUNTER, new Integer(counterVal));                cleanUp(request);        }

ActionContextCleanUp的cleanUp方法清理资源

ActionContext.setContext(null);Dispatcher.setInstance(null);