Ajax请求Session超时的处理

1、客户端的js处理(使用jqury)

<script type="text/javascript">
//<![CDATA[
$(document).ajaxComplete(function(event, xhr, settings) {
if(xhr.getResponseHeader("sessionstatus")=="timeOut"){
if(xhr.getResponseHeader("loginPath")){
window.location.replace(xhr.getResponseHeader("loginPath"));
}else{
alert("Request time out relogin plase !");
}
}
});
//]]>
</script>

2、服务器端处理(filter中)

if(sessionTimeOut){
//判断是否为ajax请求
if (httpRequest.getHeader("x-requested-with") != null && httpRequest.getHeader("x-requested-with").equalsIgnoreCase("XMLHttpRequest")) {
HttpServletResponse httpResponse = (HttpServletResponse)response;
httpResponse.addHeader("sessionstatus", "timeOut");
httpResponse.addHeader("loginPath",loginUrl);
filterChain.doFilter(request, response);//不可少，否则请求会出错
}else{//不是ajax请求，超时直接重定向
((HttpServletResponse) response).sendRedirect(loginUrl);
}
}