求教大佬,Model的addAttribute方法为什么能将数据放到页面上去

Question

之前同事给解释了几句,但是没听懂,说是涉及四大域,跪求大佬说下@RequestMapping("toUpdate") public String toUpdate(Integer id,Model model) { List<Door> list = doorService.SelectAll(); model.addAttribute("doorList",list); Order order = orderService.SelectOne(id); model.addAttribute("order",order); return "orderUpdate";