1.1重定向(如果對方不支持cookie,回寫sessionID進行session跟蹤)
?response.sendRedirect(response.encodeRedirectURL(request.getContextPath()+"/next"));
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1.2轉發
?RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(url);
?dispatcher.forward(request,response);
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1.3字符
??request.setCharacterEncoding("utf-8");
??response.setContentType("text/html;charset=utf-8");
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String servletPath = request.getServletPath();
??servletPath = servletPath.substring(servletPath.lastIndexOf("/") + 1);
??String operation = servletPath.substring(0, servletPath.indexOf(".do"));

1.設置連接超時時間(分鐘)
?<session-config>
??<session-timeout>50</session-timeout>
?</session-config>
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4.相對路徑匹配
?1>絕對匹配?/xx/yy
?2>后綴匹配?*.xx
?3>后面匹配?/xx/*
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5.監聽器
5.1ServletRequestListener
???getServletContext()
???getServletRequest()
?requestDestroyed(ServletRequestEvent)
?requestInitialized(ServletRequestEvent)
5.2HttpSessionListener
???getSession()
?sessionCreated(HttpSessionEvent)
?sessionDestroyed(HttpSessionEvent)
5.3ServletContextListener
???getServletContext()
?contextInitialized(ServletContextEvent)
?contextDestroyed(ServletContextEvent)
?
5.4ServletRequestAttributeListener
???getName()
???getValue()
?attributeAdded(ServletRequestAttributeEvent)
?attributeRemoved(ServletRequestAttributeEvent)
?attributeReplaced(ServletRequestAttributeEvent)
5.5HttpSessionAttributeListener
???getName()
???getValue()
???getSession()
?attributeAdded(HttpSessionBindingEvent)
?attributeRemoved(HttpSessionBindingEvent)
?attributeReplaced(HttpSessionBindingEvent)
5.6ServletContextAttributeListener
???getName()
???getValue()
?attributeAdded(ServletContextAttributeEvent)
?attributeRemoved(ServletContextAttributeEvent)
?attributeReplaced(ServletContextAttributeEvent)