public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest httprequest = (HttpServletRequest) request; HttpServletResponse httpresponse = (HttpServletResponse) response; String url = httprequest.getRequestURL().toString(); if (httprequest.getSession()== null) { if (httprequest.getHeader("x-requested-with") != null && httprequest.getHeader("x-requested-with").equals( "XMLHttpRequest")) { // ajax请求 httpresponse.setHeader("sessionstatus", "timeout"); } else { httpresponse.sendRedirect("/test/index.jsp"); return; } } else { chain.doFilter(request, response); } }

//全局的ajax访问，处理ajax清求时sesion超时 $.ajaxSetup({ contentType : "application/x-www-form-urlencoded;charset=utf-8", complete : function(XMLHttpRequest, textStatus) { var sessionstatus = XMLHttpRequest.getResponseHeader("sessionstatus"); // 通过XMLHttpRequest取得响应头，sessionstatus， if (sessionstatus == "timeout") { // 如果超时就处理 ，指定要跳转的页面 window.location.replace("/test/index.jsp"); } } });