SpringBoot Mybatis Thymeleaf 在线预约挂号系统 写一套java代码

很抱歉，由于时间和篇幅的限制，我无法在这里提供完整的在线预约挂号[系统](https://geek.csdn.net/educolumn/073441cd796e7450c3f98600b0cbeb95?spm=1055.2569.3001.10083)的Java代码。不过，我可以为您提供一些示例代码，帮助您更好地理解该[系统](https://geek.csdn.net/educolumn/073441cd796e7450c3f98600b0cbeb95?spm=1055.2569.3001.10083)的实现方式。 1. 注册功能Controller代码： ```java @Controller public class RegisterController { @Autowired private UserService userService; @GetMapping("/register") public [string](https://geek.csdn.net/edu/8802d631b97a4a6af1f4d0bbf8527465?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083) registerForm(Model model) { model.addAttribute("user", new User()); return "register"; @[pos](https://geek.csdn.net/educolumn/0399089ce1ac05d7729a569fd611cf73?spm=1055.2569.3001.10083)tMapping("/register") public [string](https://geek.csdn.net/edu/8802d631b97a4a6af1f4d0bbf8527465?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083) registerSubmit(@ModelAttribute User user, Model model) { if(userService.getUserByUsername(user.getUsername()) != null) { model.addAttribute("error", "用户名已存在"); return "register"; userService.addUser(user); return "redirect:/login"; ```