宠物管理系统（3）：Controller类

        模仿三层架构中的Controller编写的控制器（但是这并非是真的），用于处理不同的情境。

        MainController，用于控制整个主程序：

package com.wzb.controller;

import com.wzb.utils.menu.MainMenu;
import com.wzb.utils.wait.Wait;

import java.util.Scanner;

/**
 * 主程序
 */
public class MainController {
    private static final Scanner sc = new Scanner(System.in);

    public static void main(String[] args) throws InterruptedException {
        while (true) {
            MainMenu.showMainMenu();
            int choice = Integer.parseInt(sc.nextLine());
            switch (choice) {
                case 1: {
                    LoginController.userLogin();
                    break;
                }
                case 2: {
                    PetController.modifyPet();
                    break;
                }
                case 0: {
                    System.out.println("感谢您使用本系统，欢迎再次使用");
                    Thread.sleep(500);
                    System.out.print("系统正在退出");
                    Wait.waitMoments();
                    System.exit(0);
                }
                default: {
                    System.out.println("选择错误，请再次选择");
                }
            }
        }
    }
}

        LoginController，用于控制模拟用户登录：

package com.wzb.controller;

import com.wzb.bean.User;
import com.wzb.service.UserService;
import com.wzb.service.impl.UserServiceImpl;
import com.wzb.utils.menu.user.UserLoginMenu;
import com.wzb.utils.wait.Wait;

import java.util.Scanner;

public class LoginController {
    private static final Scanner sc = new Scanner(System.in);
    private static final UserService userService = new UserServiceImpl();

    public static void userLogin() throws InterruptedException {
        boolean flag = true;
        while (flag) {
            UserLoginMenu.showUserLoginMenu();
            int choice = Integer.parseInt(sc.nextLine());
            switch (choice) {
                case 1: {
                    User user = userService.userLogin();
                    if (user == null) {
                        System.out.println("用户不存在，登录失败，请重新登录");
                    } else if (user.getId().equals(0)) {
                        System.out.println("管理员：wzb，欢迎登录");
                        AdminController.modifyUser(user);
                    } else {
                        if (user.getStatus()) {
                            System.out.println(user.getUsername() + "欢迎登录");
                            UserController.modifyUser(user);
                        } else {
                            System.out.println("用户被锁定，不可登录");
                        }
                    }
                    break;
                }
                case 2: {
                    if (userService.userRegister()) {
                        System.out.println("注册成功");
                    } else {
                        System.out.println("请重新注册");
                    }
                    break;
                }
                case 0: {
                    System.out.println("正在返回上一级");
                    Thread.sleep(500);
                    System.out.print("");
                    Wait.waitMoments();
                    System.out.println("成功返回");
                    flag = false;
                    break;
                }
                default: {
                    System.out.println("选择错误，请再次选择");
                }
            }
        }

    }
}

        UserController，用于用户管理：

package com.wzb.controller;

import com.wzb.bean.User;
import com.wzb.service.UserService;
import com.wzb.service.impl.UserServiceImpl;
import com.wzb.utils.menu.user.UserMenu;
import com.wzb.utils.wait.Wait;

import java.util.Scanner;

public class UserController {
    private static final Scanner sc = new Scanner(System.in);

    private static final UserService userService = new UserServiceImpl();

    public static void modifyUser(User user) throws InterruptedException {
        boolean flag = true;
        while (flag) {
            UserMenu.showUserMenu();
            int choice = Integer.parseInt(sc.nextLine());
            switch (choice) {
                case 1: {
                    userService.showUser(user);
                    break;
                }
                case 2: {
                    ShopController.shop(user);
                    break;
                }
                case 3: {
                    if (userService.reCharge(user)) {
                        System.out.println("充值成功");
                    } else {
                        System.out.println("充值失败");
                    }
                    break;
                }
                case 4: {
                    if (userService.changePassword(user)) {
                        System.out.println("修改密码成功");
                    } else {
                        System.out.println("修改密码失败");
                    }
                    break;
                }
                case 5: {
                    if (userService.changeAddress(user)) {
                        System.out.println("修改地址成功");
                    } else {
                        System.out.println("修改地址失败");
                    }
                    break;
                }
                case 6: {
                    if (userService.deleteMyself(user)) {
                        System.out.print("账户已注销，正在回到登录界面");
                        Wait.waitMoments();
                        flag = false;
                    } else {
                        System.out.println("账户注销失败");
                    }
                    break;
                }
                case 0: {
                    System.out.print("退出账户" + user.getUsername());
                    Wait.waitMoments();
                    flag = false;
                }
                default: {
                    System.out.println("选择错误，请重新选择");
                }
            }
        }
    }

}

        AdminController，用于管理员：

package com.wzb.controller;

import com.wzb.bean.User;
import com.wzb.service.AdminService;
import com.wzb.service.impl.AdminServiceImpl;
import com.wzb.utils.menu.admin.AdminMenu;
import com.wzb.utils.wait.Wait;

import java.util.List;
import java.util.Scanner;

public class AdminController {
    private static final Scanner sc = new Scanner(System.in);
    private static final AdminService adminService = new AdminServiceImpl();

    public static void modifyUser(User user) throws InterruptedException {
        boolean flag = true;
        while (flag) {
            AdminMenu.showAdminMenu();
            int choice = Integer.parseInt(sc.nextLine());
            switch (choice) {
                case 1: {
                    List<User> userList = adminService.showAllUser();
                    for (User u : userList) {
                        System.out.println(u);
                    }
                    break;
                }
                case 2: {
                    System.out.println("请输入想要删除的用户id");
                    int id = Integer.parseInt(sc.nextLine());
                    if (adminService.deleteUserById(id)) {
                        System.out.println("删除成功");
                    } else {
                        System.out.println("删除失败");
                    }
                    break;
                }
                case 3: {
                    System.out.println("请输入想要更改状态的用户id");
                    int id = Integer.parseInt(sc.nextLine());
                    if (adminService.changeUserStatus(id)) {
                        System.out.println("更改状态成功");
                    } else {
                        System.out.println("更改状态失败");
                    }
                    break;
                }
                case 4: {
                    System.out.println("请输入想要更新的用户id");
                    int id = Integer.parseInt(sc.nextLine());
                    if (adminService.updateAUser(id)) {
                        System.out.println("用户更新成功");
                    } else {
                        System.out.println("用户更新失败");
                    }
                    break;
                }
                case 5: {
                    System.out.println("请输入想要查看的用户id");
                    int id = Integer.parseInt(sc.nextLine());
                    User u = adminService.getById(id);
                    System.out.println(u);
                    break;
                }
                case 6: {
                    adminService.showAdmin(user);
                    break;
                }
                case 0: {
                    System.out.print("退出管理员账户" + user.getUsername());
                    Wait.waitMoments();
                    flag = false;
                    break;
                }
                default: {
                    System.out.println("选择错误，请重新选择");
                }
            }
        }
    }
}

        PetController，用于宠物管理：

package com.wzb.controller;

import com.wzb.bean.Pet;
import com.wzb.service.PetService;
import com.wzb.service.impl.PetServiceImpl;
import com.wzb.utils.menu.pet.PetMenu;
import com.wzb.utils.wait.Wait;

import java.util.List;
import java.util.Scanner;

public class PetController {
    private static final Scanner sc = new Scanner(System.in);
    private static final PetService petService = new PetServiceImpl();

    public static void modifyPet() throws InterruptedException {
        boolean flag = true;
        while (flag) {
            PetMenu.showPetMenu();
            int choice = Integer.parseInt(sc.nextLine());
            switch (choice) {
                case 1: {
                    List<Pet> petList = petService.getAllPet();
                    for (Pet pet : petList) {
                        System.out.println(pet);
                    }
                    break;
                }
                case 2: {
                    if (petService.insertPet()) {
                        System.out.println("插入成功");
                    } else {
                        System.out.println("插入失败");
                    }
                    break;
                }
                case 3: {
                    System.out.println("请输入想要删除的宠物id");
                    int id = Integer.parseInt(sc.nextLine());
                    if (petService.deletePet(id)) {
                        System.out.println("删除成功");
                    } else {
                        System.out.println("删除失败");
                    }
                    break;
                }
                case 4: {
                    System.out.println("请输入想要更新的宠物id");
                    int id = Integer.parseInt(sc.nextLine());
                    if (petService.updatePet(id)) {
                        System.out.println("更新成功");
                    } else {
                        System.out.println("更新失败");
                    }
                    break;
                }
                case 5: {
                    System.out.println("请输入想要查看的宠物id");
                    int id = Integer.parseInt(sc.nextLine());
                    Pet pet = petService.getById(id);
                    System.out.println(pet);
                    break;
                }
                case 0: {
                    System.out.println("正在返回上一级");
                    Thread.sleep(500);
                    System.out.print("");
                    Wait.waitMoments();
                    System.out.println("成功返回");
                    flag = false;
                    break;
                }
                default: {
                    System.out.println("选择错误，请重新选择");
                }
            }
        }
    }
}

        ShopController，用于商店管理：

package com.wzb.controller;

import com.wzb.bean.User;
import com.wzb.service.ShopService;
import com.wzb.service.impl.ShopServiceImpl;
import com.wzb.utils.menu.shop.ShopMenu;
import com.wzb.utils.wait.Wait;

import java.util.Scanner;

public class ShopController {
    private static final Scanner sc = new Scanner(System.in);
    private static final ShopService shopService = new ShopServiceImpl();

    public static void shop(User user) throws InterruptedException {
        boolean flag = true;
        while (flag) {
            ShopMenu.showShopMenu();
            int choice = Integer.parseInt(sc.nextLine());
            switch (choice) {
                case 1: {
                    shopService.showAllPet();
                    break;
                }
                case 2: {
                    if (shopService.addShopCar(user)) {
                        System.out.println("添加购物车成功");
                    } else {
                        System.out.println("添加购物车失败");
                    }
                    break;
                }
                case 3: {
                    shopService.showShopCar(user);
                    break;
                }
                case 4: {
                    if (shopService.pay(user)) {
                        System.out.println("支付成功");
                    } else {
                        System.out.println("支付失败");
                    }
                    break;
                }
                case 0: {
                    System.out.println("正在返回上一级");
                    Thread.sleep(500);
                    System.out.print("");
                    Wait.waitMoments();
                    System.out.println("成功返回");
                    flag = false;
                    break;
                }
                default: {
                    System.out.println("选择错误，请重新选择");
                }
            }
        }
    }
}