spring MVC 获取全局Session

/**
 * 获取全局Session
 * @return
 */
@SuppressWarnings("unchecked")
public static String findAdminFromSession(){
try{
 HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
 Map<String,User> map =  (Map) WebUtils.getSessionAttribute(request,"user");
 User user = map.get("userInfo");
 return user!=null?(StringUtils.isNotBlank(user.getId())? user.getId(): null):null;
}catch(Exception e){
e.printStackTrace();
return null;
}

}

User视情况而定