之前同事給解釋了幾句,但是沒聽懂,說是涉及四大域,跪求大佬說下@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";