網(wǎng)博培訓(xùn)servletjavaxfilter接口定義了過濾器生命

回234過濾器是向Web應(yīng)用程序的請求和響應(yīng)處理添5過濾器將處理過的過濾器將處理過的用戶的請求發(fā)送至Web資源用戶用戶發(fā)送資資源將響應(yīng)發(fā)送至過 789Filterpublicvoidinit(FilterConfigfilterConfig)throwsServletExceptionpublicvoiddoFilter(ServletRequestServletResponseresp,FilterChainchain)throwsjava.io.IOException,ServletExceptionpublicvoidFilterConfigpublicStringpublicServletContextpublicStringgetInitParameter(String

publicjava.util.EnumerationFilterChainpublicvoiddoFilter(ServletRequestreq,ServletResponseresp)throwsIOException,ServletException <filter-name>MyFilter</filter-<url-pattern>/servletname/*</url- publicvoiddoFilter(ServletRequestrequest,ServletResponseresponse,FilterChainfilterChain){HttpServletRequestfilterChain.doFilter(requestresponse);}ServletContextListener：用于監(jiān)聽WEB應(yīng)用啟動contextDestroyed(ServletContextEventcontextInitialized(ServletContextEventattributeAdded(ServletContextAttributeEventattributeRemoved(ServletContextAttributeEventattributeReplaced(ServletContextAttributeEventHttpSessionListener：監(jiān)聽HttpSession的操作，sessionCreated(HttpSessionEventsessionDestroyed(HttpSessionEventHttpSessionAttributeListener attributeRemoved((HttpSessionBindingEventattributeReplaced((HttpSessionBindingEventvoidvalueBound(HttpSessionBindingEventvoidvalueUnbound(HttpSessionBindingEventsessionDidActivate(HttpSessionEventsessionWillPassivate(HttpSessionEventrequestInitialized(ServletRequestEventrequestDestroyed(ServletRequestEventattributeAdded(ServletRequestAttributeEventattributeRemoved(ServletRequestAttributeEventattributeReplaced(ServletRequestAttributeEventpublicclassOnlinesListenerimplementspublicvoidsessionCreated(HttpSessionEvent{Integercnt=(Integer)hse.getSe