public void filter(InterceptorChain chain) throws Throwable {
System.out.println("进去aop方法");
//获取request参数
HttpServletRequest request = Mvcs.getReq();
//获取user对象，取到其角色信息
CloudUser user = (CloudUser) request.getSession().getAttribute("user");
if(user != null){
if(user.getUserRole() == 1){
chain.doChain();
}
}else{
chain.setReturnValue("/dfcloud");//我想跳转到这个路径下，应该怎么办？
}
}