final HttpServletRequest request = (HttpServletRequest) servletRequest;
final HttpServletResponse response = (HttpServletResponse) servletResponse;
Cookie  c1 = null;
Cookie[] co=request.getCookies();
if (co!=null){
    for(Cookie c:co){
        if(c.getName().equals("JSESSIONID")){
            c1= c;
            break;
        }
    }
}
//验证
String serverName = request.getHeader("X-Real-HOST");
if (StringUtils.isEmpty(serverName)){
    serverName=request.getServerName();
}
Domain domain = new Domain();
domain.initDomain(serverName,request);
if (c1==null ){
    c1 = new javax.servlet.http.Cookie("JSESSIONID", request.getSession().getId());
    c1.setDomain("."+request.getAttribute("domain"));
    c1.setPath("/");
    response.addCookie(c1);
}