ajax请求session失效重定向到登录页面

$(function(){ ???$.ajaxSetup({ ???????type: ‘POST‘, ???????complete: function(xhr,status) { ???????????var sessionStatus = xhr.getResponseHeader(‘sessionstatus‘); ???????????if(sessionStatus == ‘timeout‘) { ???????????????var top = getTopWinow(); ???????????????alert(‘10分钟没有操作, session已过期, 请重新登录.‘); ???????????????top.location.href = ‘../LoginController/toLoginPage.do‘; //去到登录页面的请求 ???????????????????????} ???????} ???}); ???function getTopWinow(){ ???????var p = window; ???????while(p != p.parent){ ???????????p = p.parent; ???????} ???????return p; ???}})

 1 private void checkLogin(HttpServletRequest req, HttpServletResponse res, FilterChain chain) 2 ????????????throws IOException, ServletException { 3 ????????Account acc = (Account) req.getSession().getAttribute("acc"); 4 ????????if (acc != null) { 5 ????????????chain.doFilter(req, res); 6 ????????????return; 7 ????????} 8 ????????// session失效的情况 9 ????????// 1.判断是ajax请求10 ????????if (req.getHeader("x-requested-with") != null && req.getHeader("x-requested-with").equals("XMLHttpRequest")) {11 ????????????res.setHeader("sessionstatus", "timeout");12 ????????} else {// 2.不是ajax请求13 ????????????res.sendRedirect("../LoginController/toLoginPage.do");14 ????????}15 ????}