@RequestMapping("/updateCurrentUser")

    public String updateCurrentUser(HttpServletRequest request, HttpServletResponse response, String type){

        JsonObject json = new JsonObject();

        String url = "";

        if(type.equals("ADMIN_USER")){

            Object s_user1 = request.getSession().getAttribute(Global.SESSION_ADMIN);

            request.getSession().setAttribute("currentUser",s_user1);

            request.getSession().setAttribute(Global.USER_ROLE,"ADMIN_USER");

            url  = "/jsp/console/backstageHome.jsp";

        }

        if(type.equals("MEDIATORS")){

            Object s_user2 = request.getSession().getAttribute(Global.SESSION_MEDIATOR);

            request.getSession().setAttribute("currentUser",s_user2);

            request.getSession().setAttribute(Global.USER_ROLE,"MEDIATORS");

            url =  "/case/listMe";

        }

        String basePath = request.getScheme() + "://" + request.getServerName() + ":"  + request.getServerPort()+request.getContextPath();

        //如果request.getHeader("X-Requested-With") 返回的是"XMLHttpRequest"说明就是ajax请求，需要特殊处理

        if("XMLHttpRequest".equals(request.getHeader("X-Requested-With"))){

            //告诉ajax我是重定向

            response.setHeader("REDIRECT", "REDIRECT");

            //告诉ajax我重定向的路径

            response.setHeader("CONTENTPATH", basePath+url);

            response.setStatus(HttpServletResponse.SC_FORBIDDEN);

        }

        return  null;

    }

var jqxhr;

    //设置ajax请求完成后运行的函数,

    $.ajaxSetup({

        complete:function(){

            if("REDIRECT" == jqxhr.getResponseHeader("REDIRECT")){ //若HEADER中含有REDIRECT说明后端想重定向，

                var win = window;

                while(win != win.top){

                    win = win.top;

                }

                win.location.href = jqxhr.getResponseHeader("CONTENTPATH");//将后端重定向的地址取出来,使用win.location.href去实现重定向的要求

            }

        }

    });

    function updateCurrentUser(type){

        //debugger;

        jqxhr = $.ajax({

            type: "GET",

            async: true,

            url: "../../center/updateCurrentUser?type="+type,

            dataType: "json",

            success: function(data){

            },

            error:function(err){

            }

        });

    }