Java实现的小型商店管理系统

  
import java.util.*;  
  
/** 
 * Menu.java 上机第7章阶段5: 菜单类 
 */  
public class Menu {  
    /** 
     * 显示登录菜单 
     */  
    public void showLoginMenu() {  
        System.out.println("\n\n\t\t\t欢迎使用我行我素购物管理系统1.0版\n\n");  
        System.out.println("\t\t\t\t 1. 登 录 系 统\n\n");  
        System.out.println("\t\t\t\t 2. 退 出\n\n");  
        System.out.println("* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\n");  
        System.out.print("请选择,输入数字:");  
    }  
  
    /** 
     * 显示主菜单 
     */  
    public void showMainMenu() {  
        System.out.println("\n\n\t\t\t\t欢迎使用我行我素购物管理系统\n");  
        System.out.println("* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\n");  
        System.out.println("\t\t\t\t 1. 客 户 信 息 管 理\n");  
        System.out.println("\t\t\t\t 2. 购 物 结 算\n");  
        System.out.println("\t\t\t\t 3. 真 情 回 馈\n");  
        System.out.println("\t\t\t\t 4. 注 销\n");  
        System.out.println("* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\n");  
        System.out.print("请选择,输入数字:");  

  
        boolean con;  
        do {  
            con = false;  
            /* 输入数字，选择菜单 */  
            Scanner input = new Scanner(System.in);  
            int no = input.nextInt();  
            if (no == 1) {  
                // System.out.println("执行显示客户信息管理菜单");  
                showCustMMenu(); // 显示客户信息管理菜单  
            } else if (no == 2) {  
                System.out.println("执行购物结算");  
            } else if (no == 3) {  
                // System.out.println("执行真情回馈");  
                showSendGMenu(); // 显示礼品馈赠菜单  
            } else if (no == 4) {  
                // System.out.println("执行注销");  
                showLoginMenu(); // 显示系统登陆菜单  
            } else {  
                System.out.print("输入错误, 请重新输入数字：");  
                con = true;  
            }  
        } while (con);  
  
        System.out.println("\n程序结束。");  
    }  
  
    /** 
     * 显示客户管理菜单 
     */