UserVO{  pub time:String  }

impl From<User> for UserVO{
   .....
}

//业务代码
#[tokio::main]
async fn main(){
  let user:User = User::select_by_column(rb,"id",1).await.unwrap();
  let user_vo = UserVO::from(user);
 // 返回 user_vo  给前端
}