session过期，拦截ajax请求并跳转登录页面

 1 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) 2 ????????????throws IOException, ServletException { 3 ?4 ????????HttpServletResponse hresponse = (HttpServletResponse)response; 5 ????????HttpServletRequest hrequest = (HttpServletRequest)request; 6 ????????HttpServletResponseWrapper wrapper = new HttpServletResponseWrapper((HttpServletResponse) response); 7 ?8 ????????String logonStrings = config.getInitParameter("logonStrings"); ???????// 登录登陆页面 9 ????????String redirectPath = hrequest.getContextPath() + config.getInitParameter("redirectPath");// 没有登陆转向页面10 ????????String disabletestfilter = config.getInitParameter("disabletestfilter");// 过滤器是否有效11 ????????String reString = hrequest.getRequestURI();12 ????????if (disabletestfilter.toUpperCase().equals("Y")) { ???// 过滤无效13 ????????????chain.doFilter(request, response);14 ????????????return;15 ????????}16 // ???????User user = ( User ) hrequest.getSession().getAttribute("user");//判断用户是否登录17 ????????String session_key = (String) hrequest.getSession().getAttribute("token");18 ????????String username = (String) hrequest.getSession().getAttribute("username");19 ????????if ("".equals(session_key) || session_key == null) {20 ????????????String[] logonList = logonStrings.split(",");21 ????????????if (this.isContains(reString, logonList)) {// 对登录页面不进行过滤22 ????????????????chain.doFilter(request, response);23 ????????????????return;24 ????????????}else{25 ????????????????request.setAttribute("username", null);26 ????????????????boolean isAjaxRequest = this.isAjaxRequest(hrequest);27 ????????????????if (isAjaxRequest) {28 ????????????????????//系统的根url29 ????????????????????chain.doFilter(request, response);30 ????????????????????return;31 ????????????????}32 ????????????????wrapper.sendRedirect(redirectPath);33 ????????????????return;34 ????????????}35 ????????}else {36 ????????????if(username !=null || username .equals("")) {37 ????????????????Pattern pattern = Pattern.compile("/iad/");38 ????????????????Matcher matcher = pattern.matcher(reString);39 ????????????????Pattern pattern1 = Pattern.compile("/iad/views/login/login.jsp");40 ????????????????Matcher matcher1 = pattern1.matcher(reString);41 ????????????????if(matcher.matches() ||matcher1.matches()){42 ????????????????????wrapper.sendRedirect("/iad/views/home/index.jsp");43 ????????????????????return;44 ????????????????}else {45 ????????????????????chain.doFilter(request, response);46 ????????????????????return;47 ????????????????}48 ????????????}else{49 ????????????????boolean isAjaxRequest = this.isAjaxRequest(hrequest);50 ????????????????if (isAjaxRequest) {51 ????????????????????chain.doFilter(request, response);52 ????????????????????return;53 ????????????????}54 ????????????????Pattern pattern = Pattern.compile(".*\\/views\\/login\\/login\\.jsp");55 ????????????????Matcher matcher = pattern.matcher(reString);56 ????????????????Pattern pattern2 = Pattern.compile(".*\\/oms/");57 ????????????????Matcher matcher2 = pattern2.matcher(reString);58 ????????????????// 是否是登陆页面59 ????????????????if (matcher.matches() || matcher2.matches()) {60 ????????????????????request.setAttribute("username", username);61 ????????????????????wrapper.sendRedirect("/iad/views/home/index.jsp");62 ????????????????????return;63 ????????????????}64 ????????????????chain.doFilter(request, response);65 ????????????????return;66 ????????????}67 68 ????????}69 70 ????}

1 ?public static boolean isAjaxRequest(HttpServletRequest request) {2 ????????String header = request.getHeader("X-Requested-With");3 ????????if (header != null && "XMLHttpRequest".equals(header))4 ????????????return true;5 ????????else6 ????????????return false;7 ????}

 1 $.ajaxSetup( { 2 ????????type: "POST" , // 默认使用POST方式 3 ????????headers: { // 默认添加请求头 4 ????????????"Author": "CodePlayer" , 5 ????????????"Powered-By": "CodePlayer" 6 ????????} , 7 ????????error: function(xhr, textStatus, errorMsg){ // 出错时默认的处理函数 8 ??????????var sessionStatus = xhr.getResponseHeader(‘sessionstatus‘); 9 ????????if(sessionStatus == ‘timeout‘) {10 ????????????var top = getTopWinow();11 ????????????var ids=layer.alert("导入成功！");12 ????????????window.location.href = "/iad/veiws/login/login.jsp";13 ????????}14 15 ????????}16 ????} );

 1 ?@ResponseBody 2 ????@RequestMapping("/loginCheck") 3 ????public Boolean loginCheck(HttpServletRequest request, HttpServletResponse response) { 4 ?5 ????????String session_key = (String) request.getSession().getAttribute("token"); 6 ????????String username = (String) request.getSession().getAttribute("username"); 7 ????????if (session_key == null || username == null) { 8 ????????????response.setHeader("sessionstatus", "timeout"); 9 ????????????return false;10 ????????}11 ????????return true;12 ????}

 var timeid=window.setInterval("checkSession()", 1000); ????????????checkSession= function () { ????????????????$.ajax({ ????????????????????url: "../../loginCheck", ????????????????????type: "POST", ????????????????????dataType: "json", ????????????????????success: function (result) { ????????????????????????if (result != true) { ????????????????????????????window.clearInterval(timeid); ????????????????????????????Ewin.alert({message: "由于您长时间没有操作, session已过期, 请重新登录"}).on(function (e) { ????????????????????????????????window.location.href = "/iad/veiws/login/login.jsp"; ????????????????????????????}) ????????????????????????} ????????????????????} ????????????????}); ????????????};