面向对象程序设计试题

Question

一、技术
JDBC、MySQL数据库
二、实现功能
1)登陆功能(15分)
1.1)
用户名判断
1.2)
密码判断
1.2.1)密码输入错误3次，账号锁定5s
2)列表显示功能(10分)
3)查询功能(10分)
4)取款功能(15分)
4.1)判断取款金额是否为100倍数
4.2)判断卡内余额是否大于取款金额
5)存款功能(10分)
5.1)判断存款金额是否为100倍数
6)转账功能(15分)
6.1)判断转账金额是否为100倍数
6.2)判断卡内余额是否大于转账金额
6.3)转账给新的账户
7)改密功能(15分)
7.1)输入原始密码并确认无误
7.2)输入修改的密码
7.3)修改成功,重新登录

Answer 1

package view;

import java.util.Scanner;

import service.AccountService;
import service.AccountServiceImpl;

import entity.Account;

/**
 * View表示层
 * 
 */
public class AccountView {
     private static Scanner in = new Scanner(System.in);
     //View层调用Service层
     static AccountService accountService = new AccountServiceImpl();
        
    public static void main(String[] args) {
        System.out.println("************欢迎进入银行管理系统************");
        System.out.println("1.存钱√            2.取钱√");
        System.out.println("3.查询余额√        4.转账√");
        System.out.println("5.注册账户√        6.注销账户√");
        System.out.println("7.更改密码√        0.退出登录√");
        while (true) {
            System.out.print("请输入选项进行您的操作:");
            // 输入选择的业务项
            int n = in.nextInt();
            switch (n) {
            case 1:
                save();
                // 存钱
                break;
            case 2:
                draw();
                // 取钱
                break;
            case 3:
                queryBalance();
                // 查询余额
                break;
            case 4:
                transfer();
                // 转账
                break;
            case 5:
                // 注册账户
                regist();
                break;
            case 6:
                logout();
                // 注销账户
                break;
            case 7:
                changepassword();
                // 更改密码
                break;
            case 0:
                // 退出登录
                System.out.println("您已退出,感谢使用");
                System.exit(0);
                break;
            default:
                throw new RuntimeException("您的输入有误,请重新输入!");
            }
        }
    }
    
    //6.注销账户
    private static void logout() {
        //View层收集信息
        int cardid = -1;
        String password = null;
        System.out.println("请输入账号:");
        cardid = in.nextInt();
        System.out.println("请输入密码:");
        password = in.next();
        
        try{
            //进入Service层调用logout函数
            accountService.logout(cardid,password);
            System.out.println("账户注销完成!");
        }catch(Exception e){
            System.out.println(e.getMessage());
        }
        
    }

    //7.更改密码
    private static void changepassword() {
        //View层收集信息
        int cardid = -1;
        String password = null;
        String chpassword = null;
        
        System.out.println("请输入账号:");
        cardid = in.nextInt();
        System.out.println("请输入密码:");
        password = in.next();
        System.out.println("请输入修改后的密码");
        chpassword = in.next();
        
        try{
            //进入Service层调用changepassword函数
            accountService.changepassword(cardid,password,chpassword);
            System.out.println("密码修改完成");
        }catch(Exception e){
            System.out.println(e.getMessage());
        }
        
        
    }

    //2取钱
    private static void draw() {
        //View层收集信息
        int cardid = -1;
        String password = null;
        double money= 0.0;
        
        System.out.println("请输入账号:");
        cardid = in.nextInt();
        System.out.println("请输入密码:");
        password = in.next();
        
        System.out.println("请输入取钱金额:");
        money = in.nextDouble();
        
        try{
            //进入Service层调用draw函数
            accountService.draw(cardid,password,money);
            System.out.println("取钱完成");
        }catch(Exception e){
            System.out.println(e.getMessage());
        }
    }

    //1.存钱
    private static void save() {
        //View层收集信息
        int cardid = -1;
        String password = null;
        double money= 0.0;
        
        System.out.println("请输入账号:");
        cardid = in.nextInt();
        System.out.println("请输入密码:");
        password = in.next();


        System.out.println("请输入存钱金额:");
        money = in.nextDouble();
        
        try{
            //进入Service层调用save函数
            accountService.save(cardid,password,money);
            System.out.println("存钱完成");
        }catch(Exception e){
            System.out.println(e.getMessage());
        }
    }

    //4.转账
    private static void transfer() {
        //View层收集信息
        int from_cardid = -1;
        int to_cardid = -1;
        String password = null;
        double money= 0.0;
        
        System.out.println("请输入账号:");
        from_cardid = in.nextInt();
        System.out.println("请输入密码:");
        password = in.next();
        System.out.println("请输入对方账号:");
        to_cardid = in.nextInt();
        System.out.println("请输入转账金额:");
        money = in.nextDouble();
        
        try {
            //进入Service层调用transfer函数
            accountService.transfer(from_cardid,password,to_cardid,money);
            System.out.println("转账完成!");
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }

    //3.查询余额
    private static void queryBalance() {
        //View层收集信息
        int cardid = -1;
        String password = null;
        
        System.out.println("请输入账户");
        cardid = in.nextInt();
        System.out.println("请输入密码");
        password = in.next();
        
        try{
            //交给Service层处理,Service又访问Dao层,获得balance的值
            Double balance = accountService.queryBalance(cardid,password);
            System.out.println("您当前的余额为:"+balance);
        }catch(Exception e){
            System.out.println(e.getMessage());
        }    
    }
    
    //5.注册账户
    private static void regist() {
        //View层收集信息
        String name = null;
        String password = null;
        String repassword = null;
        
        System.out.println("请输入姓名:");
        name = in.next();
        System.out.println("请输入密码:");
        password = in.next();
        System.out.println("请确认密码:");
        repassword = in.next();

        Account account = new Account(null,name,password,0.0);
        try{
            //交给Service层处理
            accountService.regist(account,repassword);
            System.out.println("注册成功√");
        }catch(Exception e){
            //捕捉异常
            System.out.println(e.getMessage());
        }
    }
}

参考地址：

银行后台管理系统Demo(三层架构+JDBC+MySQL+ORM)_匿名攻城狮-CSDN博客_银行后台管理系统 文章目录局部效果展示整体架构conf包sql语句一、view视图层二、service业务层service层抽象接口service实体类三、dao数据访问层dao层抽象接口dao层类四、entity实体类五、util工具包JdbcTemplate模板包JdbcUtil3工具类六、rowmapper封装结果集RowMapper抽象类AccountRowMapper封装结果集类局部效果展示整体... https://blog.csdn.net/weixin_43691058/article/details/103480292