Java课堂测试--实现ATM基本操作程序--感受

　　此次测试是相对正式的一次测试，也是一次检验。但是，拿到试卷真的是一脸懵，根本不用写就可以看到差距，以前就没接触过这么长要求的题目，说出来也是惭愧。暑假用了部分时间学习Java基础，大部分是看视频，实际动手敲代码的时间不多。加上一些参考才大概能看懂Java程序。这道实现ATM基本功能程序题，通读要求，就要花个十几分钟。更不用说实际敲代码实现功能了，然而老师在前面把这道题解析的十分”透彻“，但是我认为大多数同学还是一脸懵，包括我，甚至我都不屑于听，不是因为太简单，而是我感觉老师在做无用功，会做的肯定会做，不会的肯定差在基础，基础不过关，说这么多方法也没用吧，至少我这样认为，实际也是这样吧。然而，这些都是完不成的借口。

　　话说回来，这次测试定义account类，设定私有变量很基础，算是这道题中最简单的一部分了。将用户信息存到.txt中，并对文档中的信息读写操作不熟悉，以至于AccountManager类与account类没有联系的桥梁，网上参考相关问题，他（她）没有多个用户信息，只是确定的账户名和密码。系统主界面也是相对简单的，因为小学期大部分的题都有一个增删改查的菜单界面，一系列的输出语句就搞定了。输入账号密码是一个原理，输入的内容和以存在的账号密码数据比较判断能否进入下一个界面。存款用whetherNum（String）函数判断是否输入的是整数，然后用Integer.parseInt(num)将num=in.next()获取的数据转换为整型再来判断是否是100的倍数，配合save()函数和addMoney()函数实现账户金额的增加，支出（减少）同理。转账功能，ATM通过关键字extends继承一个已有的类PATM,ATM中存放被转账的用户的账号，然后用boolean transfer(String s, int x)函数判断转账账号是否相符，以及转账金额是否大于余额，如果转账成功，通过minusMoney(x)函数实现原账户的金额减少，此程序没有实现被转账账户的金额变化。大致内容如此，能力有限美女呢按要求实现全部功能。但是我会更加努力的！

　　参考 遗风遗风丶ATM程序。

源码：

Account.java

// 信1705-3 20173630 宋子健
package ATMOP;

public class Account {
 private String accountID;//用户账号
 
 private String accountname;//账户名称
 
 private String operatedate;//操作日期
 
 private int operatetype;//操作类型
 
 private String accountpassword;//用户密码
 
 private int accountbalance;//账户余额
 
 private int amount;//操作流水金额
 public Account(String accountID, String accountname, String operatedate, int operatetype,

   String accountpassword,int accountbalance,int amount) {

  this.accountID = accountID;

  this.accountname = accountname;

  this.operatedate = operatedate;

  this.operatetype = operatetype;

  this.accountpassword = accountpassword;
  
  this.accountbalance = accountbalance;
  
  this.amount = amount;}
 
 public String getAccountID() {
  return accountID;
 }
 public void setAccountID(String accountID) {
  this.accountID = accountID;
 }

 public String getAccountName() {
  return accountname;
 }
 public void setAccountName (String accountName) {
  this.accountname = accountName;
 }
 
 public String getOperatedate() {
  return operatedate;
 }
 public void setOperatedate(String Operatedate) {
  this.operatedate = Operatedate;
 }
 
 public int getOperatetype() {
  return operatetype;
 }
 public void setOperatetype(int Operatetype) {
  this.operatetype = Operatetype;
 }
 
 public String getAccountpassword() {
  return accountpassword;
 }
 public void setAccountpassword(String accountpassword) {
  this.accountpassword = accountpassword;
 }
 
 public int getAccountbalance() {
  return accountbalance;
 }
 public void setAccountbalance(int accountbalance) {
  this.accountbalance = accountbalance;
 }
 
 public int getAmount() {
  return amount;
 }
 public void setAmount(int amount) {
  this.amount = amount;
 }
}

AccountManager.java

package ATMOP;
import java.util.*;
public class AccountManager {
 @SuppressWarnings({ "resource", "unused" })//(“unused”)未使用的变量  (“resource”)有泛型未指定类型
 public static void main(String[] args)  throws NumberErrorException {
  // TODO Auto-generated method stub
  Scanner in=new Scanner(System.in);
        PATM atm=new ATM();
        NumberErrorException nee=new NumberErrorException("输入非法！");
        NotHundredTimesException nhte=new NotHundredTimesException("不是一百的整数倍！");
        PasswordErrorException pee=new PasswordErrorException("输入错误的密码超过三次！");
        int passwordErrorTimes=0;
        int choose=-1,number=0,x=0;
        String num="";
        String pw="";
        next:while(true){
         System.out.println("******************************");
            System.out.println("   欢迎使用中国工商银行自助柜员系统       ");
            System.out.println("******************************");
            System.out.println("请输入您的账号：");
            int kk=-1;
            String c=in.next();
            if(whetherNum(c))
                kk=Integer.parseInt(c);
            if(kk==0) break;
            else if(kk!=1){
                System.out.println("输入错误！");
                continue;
            }
            System.out.println("******************************");
            System.out.println("  欢迎***使用中国工商银行自助柜员系统  ");
            System.out.println("******************************");
            System.out.println("请输入您的密码：");
            pw=in.next();
            if(atm.ifPass(pw)){
                while(true){
                    showFace();
                    String cc=in.next();
                    if(whetherNum(cc))
                        choose=Integer.parseInt(cc);
                    switch(choose){
                    case 1:
                     System.out.println("******************************");
                        System.out.println("  欢迎***使用中国工商银行自助柜员系统  ");
                        System.out.println("******************************");
                        System.out.println("输入存款金额：");
                        while(true){
                            try{
                                num=in.next();
                                if(!whetherNum(num))
                                    throw nee;
                                else if((x=Integer.parseInt(num)%100)!=0)
                                    throw nhte;
                                else
                                    break;
                            }
                            catch(NumberErrorException e){
                                System.out.println("输入正确的数字！");
                            }
                            catch(NotHundredTimesException e){
                                System.out.println("录入错误，请输入合法的整数（100的整数倍）！");
                            }
                        }
                        number=Integer.parseInt(num);
                        atm.save(number);
                        System.out.println("******************************");
                        System.out.println("  欢迎***使用中国工商银行自助柜员系统  ");
                        System.out.println("******************************");
                        System.out.println("当前账户存款操作成功。");
                        System.out.println("当前账户余额为："+atm.getRest()+"元");
                        break;
                    case 2:
                     System.out.println("******************************");
                     System.out.println("  欢迎***使用中国工商银行自助柜员系统  ");
                        System.out.println("******************************");
                        System.out.println("当前用户每日可以支取2万元。");
                        System.out.println("请选择：");
                        int a[]={100,500,1000,1500,2000,5000};
                        for(int i=0;i<a.length;i++)
                            System.out.println((i+1)+"."+a[i]+"元");
                        System.out.println("7.其他金额");
                        String bb="";
                        int ch=-1;
                        bb=in.next();
                        if(whetherNum(bb)){
                            ch=Integer.parseInt(bb);
                        }
                        if(ch>=1&&ch<=6){
                            if(atm.withdraw(a[ch-1]))
                            {
                            System.out.println("******************************");
                            System.out.println("  欢迎***使用中国工商银行自助柜员系统  ");
                            System.out.println("******************************");
                            System.out.println("当前账户取款操作成功！     ");
                            }
                            else
                                System.out.println("账户余额不足！");
                        }
                        else if(ch==7){
                         System.out.println("******************************");
                            System.out.println("  欢迎***使用中国工商银行自助柜员系统  ");
                            System.out.println("******************************");
                            System.out.println("请输入取款金额：");
                            while(true){
                                try{
                                    num=in.next();
                                    if(!whetherNum(num))
                                        throw nee;
                                    else if((x=Integer.parseInt(num)%100)!=0)
                                        throw nhte;
                                    else
                                        break;
                                }
                                catch(NumberErrorException e){
                                    System.out.println("输入正确的数字！");
                                }
                                catch(NotHundredTimesException e){
                                    System.out.println("录入错误，请输入合法的整数（100的整数倍）！");
                                }
                            }
                            number=Integer.parseInt(num);
                            if(atm.withdraw(number))
                                System.out.println("取款成功！");
                            else
                                System.out.println("余额不足！");
                        }
                        else
                            System.out.println("输入有误！");
                        System.out.println("当前余额："+atm.getRest()+"元");
                        break;
                    case 3:
                     System.out.println("******************************");
                        System.out.println("  欢迎***使用中国工商银行自助柜员系统  ");
                        System.out.println("******************************");
                        System.out.println("请输入转账账户：");
                        String s=in.next();
                        System.out.println("******************************");
                        System.out.println("  欢迎***使用中国工商银行自助柜员系统  ");
                        System.out.println("******************************");
                        System.out.println("请输入转账金额：");
                        while(true){
                            try{
                                num=in.next();
                                if(!whetherNum(num))
                                    throw nee;
                                else if((x=Integer.parseInt(num)%100)!=0)
                                    throw nhte;
                                else
                                    break;
                            }
                            catch(NumberErrorException e){
                                System.out.println("输入正确的数字！");
                            }
                            catch(NotHundredTimesException e){
                                System.out.println("录入错误，请输入合法的整数（100的整数倍）！");
                            }
                        }
                        number=Integer.parseInt(num);
                        if(atm.transfer(s, number))
                            System.out.println("转账成功！");
                        else
                            System.out.println("转账失败！");
                        System.out.println("当前余额："+atm.getRest()+"元");
                        break;
                    case 4:
                     System.out.println("输入当前密码：");
                     String M=in.next();
                        System.out.println("输入修改密码：");
                        String p=in.next();
                        if(p.length()==6&&whetherNum(p))
                            atm.setPassword(p);
                        else{
                            System.out.println("不是六位或者不是数字！");
                        }
                        break;
                    case 5:
                        System.out.println("当前余额："+atm.getRest()+"元");
                        break;
                    default:
                        continue next;
                    }
                }
            }
            else{
                System.out.println("密码错误！");
                try{
                    passwordErrorTimes++;
                    if(passwordErrorTimes>3)
                        throw pee;
                }
                catch(PasswordErrorException e){
                    System.out.println(e.getMessage()+"账户暂时冻结！");
                    return ;
                }
            }

     }
 }
  //显示菜单
    public static void showFace(){
     System.out.println("******************************");
        System.out.println("  欢迎***使用中国工商银行自助柜员系统  ");
        System.out.println("******************************");
        System.out.println("    1.存款：");
        System.out.println("    2.取款：");
        System.out.println("    3.转账汇款：");
        System.out.println("    4.修改密码：");
        System.out.println("    5.查询余额：");
        System.out.println("    6.退卡：");
        System.out.println("******************************");
        System.out.println("请选择：");
    }
    //判断字符串是否为整数（0-999999）
    public static boolean whetherNum(String s){
        boolean flag=true;
        if(s.length()>=7)
            return false;
        char arr[]=s.toCharArray();
        for(int i=0;i<s.length();i++){   
            if(arr[i]<'0'||arr[i]>'9')
                flag=false;
        }
        return flag;
    }
}

class PersonalAccount{
    private String passWord="123456";//密码
    @SuppressWarnings("unused")
    private String number;//银行卡号
    private int money=0;
    public int getMoney(){return money;}//余额
    public void setPw(String s){passWord=s;}//设置密码
    public void addMoney(int x){money+=x;}//加钱
    public void minusMoney(int x){money-=x;}//减钱
    public boolean whetherPwTrue(String s){//密码是否正确
        if(s.equals(passWord))
            return true;
        else return false;
    }
}
//abstract修饰类，会使这个类成为一个抽象类
abstract class PATM{
    public abstract boolean withdraw(int x);//取款
    public abstract void save(int x);//存款
    public abstract boolean transfer(String s,int x);//转账
    public abstract boolean ifPass(String s);//判断输入的密码是否正确
    public abstract int getRest();//查询余额
    public abstract void setPassword(String s);//设置密码
}
class ATM extends PATM{
    private String numbers[]={"1234567891000000","11112222333344445"};//已有的账户卡号
    private PersonalAccount account=new PersonalAccount();
    public boolean withdraw(int x) {
        if(x>account.getMoney())
            return false;
        else{
            account.minusMoney(x);
            return true;
        }
    }
    public void save(int x) {
        account.addMoney(x);
    }
    public boolean transfer(String s, int x) {
        //转账
        //先判断转到账户号是否存在
        //再判断余额是否足够
        boolean flag=false;
        for(int i=0;i<numbers.length;i++)//比较s是否和t相等，返回一个boolean类型的值（即false或者true）
            if(s.equals(numbers[i])) flag=true;//equals()方法在Object定义中是与==相等.就是比较2个对象引用是否相等
        if(x>account.getMoney()) flag=false;
        if(x<=account.getMoney()&&flag) account.minusMoney(x);;
        return flag;
    }
    public boolean ifPass(String s) {
        return account.whetherPwTrue(s);
    }
    public int getRest() {
        return account.getMoney();
    }
    public void setPassword(String s) {
        account.setPw(s);       
    }
}
@SuppressWarnings("serial")
class NumberErrorException extends Exception{
    public NumberErrorException(String msg){
        super(msg);
    }
}
@SuppressWarnings("serial")
class PasswordErrorException extends Exception{
    public PasswordErrorException(String msg){
        super(msg);
    }
}
@SuppressWarnings("serial")
class NotHundredTimesException extends Exception{
    public NotHundredTimesException(String msg){
        super(msg);
    }
}