用java实现银行管理系统效果

银行管理系统 (java实现)

1.创建一个封装类（Studentss）

import javax.naming.Name;

import javax.naming.NamingEnumeration;
 
 public class Studentss {

//无参
public  Studentss(){}
//有参
public  Studentss(String name,String account,int balance,String uesrpwds,String card){
     super();
     this.name=name;
     this.account=account;
     this.balance=balance;
     this.uesrpwds=uesrpwds;
     this.card=card;

}
//修改
public  Studentss(String name,String account,int balance,String uesrpwds,String card,int id){
    super();
    this.name=name;
    this.account=account;
    this.balance=balance;
    this.uesrpwds=uesrpwds;
    this.card=card;
    this.id = id;
}

//定义一个数据类封装
private String name;//名字
private String account;//账号
private int balance;//余额
private String uesrpwds;//密码
private String card;//身份证号
private  int id;//编号
//封装id
public  int getId(){
    return id;
}

public void setId(int id) {
    this.id = id;
}
//封装名字get
public  String getName(){
    return name;
}

   public void setName(String name) {
    this.name = name;
}

//封装账号get
public String getAccount(){
    return account;
}

public void setAccount(String account) {
    this.account = account;
}

//封装余额get

public int getBalance() {
    return balance;
}

public void setBalance(int balance) {
    this.balance = balance;
}
//封装密码get
public String getUesrpwds() {
    return uesrpwds;
}
public void setUesrpwds(String uesrpwds) {
    this.uesrpwds = uesrpwds;
}
//封装身份证get
public String getCard() {
    return card;
}
//set身份证
public void setCard(String card) {
    this.card = card;
}


@Override
public String toString() {
    return super.toString();
}
}

2.实现增删改查等效果 main方法(DoemTest)

import com.sun.org.apache.xpath.internal.objects.XObject;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import java.util.Scanner;


public class DoemTest{

public static ArrayList<Studentss> list =new ArrayList<>();//声明数组

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
  //初始化两个数据
    Studentss studentss = new Studentss();
    studentss.setName("张颖颖");
    studentss.setAccount("17908064359");
    studentss.setBalance(2000);
    studentss.setUesrpwds("4321");
    studentss.setCard("510010619891231127");
    list.add(studentss);//初始化数组 添加值

    Studentss studentss1 = new Studentss();
    studentss1.setName("刘华");
    studentss1.setAccount("17908064368");
    studentss1.setBalance(8000);
    studentss1.setUesrpwds("4567");
    studentss1.setCard("410207198904051271");
    list.add(studentss1);//初始化数组 添加值
 //  this.list =new ArrayList<>();
    //String pass =input.lenth();
    int input;
    //银行增删改查输出

    System.out.println("账户姓名:张颖颖 账号: 17908064359 存款余额: 2000 密码：4321 身份证号:510010619891231127");
    System.out.println("账户姓名:刘华 账号: 17908064368 存款余额: 8000 密码：4567 身份证号:410207198904051271");
    do {

        System.out.println("=====================欢迎使用知道银行服务====================");
        System.out.println("1:开户 2:存款 3: 取款 4: 转账 5:查余额 6:修改密码 0:退出");
        System.out.println("===========================================================");
        //判断输出选项
        Scanner set = new Scanner(System.in);//接受输入的值（0~6）;
        input =set.nextInt();
        switch (input){
            case 1://开户
                Openaccount(list);
                break;
            case 2://存款
                CunKuang(list);
                break;
            case 3://取款
                Qukuang(list);
                break;
            case 4://转账
                Zhuangzhang(list);
                break;
            case 5://查询余额
                Chaxun(list);

                break;
            case 6://修改密码
                Changethepassword(list);
                break;
            case 0://退出
                System.out.println("谢谢使用!");
                break;
            default:
                System.out.println("请输入指定的命令语句！");
                break;



        }
    }while (input != 0);

}
//开户
public static void Openaccount(ArrayList<Studentss> list){
    Studentss studentss =new Studentss();
    int RDnum=(int)((Math.random()*9+1)*1000);//定义数据数
    Scanner sc=new Scanner(System.in);
    System.out.println("请输入用户名:");
    String name = sc.next();
    studentss.setName(name);//接收输出
    //list.add(studentss.getName());//存储数据


    System.out.println("请输入账号密码:");
    String uesrpwds=sc.next();
    studentss.setUesrpwds(uesrpwds);//接收输出
    //list.add(studentss.getUesrpwds());//存储数据

    System.out.println("请输入身份证号:");
    String card= sc.next();
    studentss.setCard(card);//接收输出
    //list.add(studentss.getCard());//存储数据
        System.out.println("请输入金额:");
        int balance=sc.nextInt();
        studentss.setBalance(balance);//接收输出
        //list.add(studentss.getBalance());//存储数据

        String account="1790806"+RDnum; //账号:
        studentss.setAccount(account);//接收输出
        //list.add(studentss.getAccount());//存储数据
        System.out.println("账号:"+account);
        System.out.println("账号名:"+name);
        System.out.println("余额:"+balance);
        System.out.println("创建成功!");

        list.add(studentss);





 }
 //查询金额

   public static void Chaxun(ArrayList<Studentss> list) {

    Scanner cx2 = new Scanner(System.in);

    System.out.println("请输入账号:");

    String account = cx2.next();
 
    System.out.println("请输入账号密码:");
  
    Scanner mc2 = new Scanner(System.in);
   
    String uesrpwds = cx2.next();
    
    Iterator<Studentss> iterator = list.iterator();
    while (iterator.hasNext()) {//判断是否存在下一个对象元素      
           Studentss studentss = (Studentss) iterator.next();//获取下一元素
        if (account.equals(studentss.getAccount()) && 
uesrpwds.equals(studentss.getUesrpwds())) {
            System.out.println("账号的金额为:" + studentss.getBalance()); 
            break;
  
        }
   
    }
    
}
//存款
public static void  CunKuang(ArrayList<Studentss> list){
    //对象
  //  Studentss studentss= new Studentss();
    System.out.println("请输入账号:");
    Scanner cx = new Scanner(System.in);
    String account =cx.next();
     Iterator<Studentss> iterator = list.iterator();
     while (iterator.hasNext()){
         Studentss  studentss =(Studentss) iterator.next();
         if (account.equals(studentss.getAccount())){
             System.out.println("请输入存款金额:");
             Scanner cxc =new Scanner(System.in);
             int num = cxc.nextInt();
             if (num >= 0) {
                 studentss.setBalance(studentss.getBalance()+num);
                 System.out.println("存款成功!余额为:"+studentss.getBalance());
                 break;
             }else {
                 System.out.println("存款失败!余额为:"+studentss.getBalance());
                 break;
             }

         }
         else {

        } if(iterator.hasNext() ==false){
        System.out.println("查无账号!");
    }
}




}
//取款
public static void  Qukuang(ArrayList<Studentss> list){
    Scanner cx = new Scanner(System.in);
    System.out.println("请输入账号:");
    String account =cx.next();
    Scanner mc = new Scanner(System.in);
    System.out.println("请输入账号密码:");
    String uesrpwds =mc.next();
    //迭代器
    Iterator<Studentss> iterator = list.iterator();
    while (iterator.hasNext()){//判断是否存在下一个对象元素
        Studentss  studentss =(Studentss) iterator.next();//获取下一元素
        //判断密码账号是否存在相等
        if(account.equals(studentss.getAccount())&&uesrpwds.equals(studentss.getUesrpwds()))
        {
            System.out.println("请输入取款金额:");
            Scanner mcx =new Scanner(System.in);
            int mic =mcx.nextInt();
            studentss.setBalance(studentss.getBalance()-mic);
            if (mic>studentss.getBalance()){
                System.out.println("取款失败！");
            }else {
            System.out.println("取款成功!余额为:"+studentss.getBalance());
            }
            break;


        }else {
            if(iterator.hasNext() ==false){
                System.out.println("账号或者密码不存在!");
            }
        }
    }

}
//转账
public static void  Zhuangzhang(ArrayList list){
    Scanner input = new Scanner(System.in);// 赋值一个输入值
    System.out.println("请输入转出账号:");
    String account =input.next();
    System.out.println("请输入转出账户密码:");
    String pwd1=input.next();
    System.out.println("请输入转入账号:");
    String account1=input.next();
    //迭代器
    Iterator<Studentss> iterator=list.iterator();
    while (iterator.hasNext()){
        Studentss studentss=iterator.next();
        //判断转出账户是否存在
        if (account.equals(studentss.getAccount())&&pwd1.equals(studentss.getUesrpwds()) ) {
            System.out.println("请输入转出金额");
            int moneys=input.nextInt();
            //判断转出账户金额是否大于或小于所需要金额
            if (studentss.getBalance()>=moneys){
                //迭代器在迭代一次
                Iterator<Studentss> iterator1=list.iterator();
                while (iterator1.hasNext()){
                    Studentss studentss1=iterator1.next();
                    //判断转入账户是否存在
                    if (account1.equals(studentss1.getAccount())&&account!=account1){
                        //满足条件转出账户扣除金额
                        studentss.setBalance(studentss.getBalance()-moneys);
                        //满足条件转入账户存入金额
                        studentss1.setBalance(studentss1.getBalance()+moneys);
                        System.out.println("转账成功,转出账号:" +studentss.getAccount()+ "转出金额:" +studentss.getBalance()
                        +"转入账号:" +studentss1.getAccount()+ "转入金额" +studentss1.getBalance());
                        break;
                    }


                }
                break;
            }
            else {
                System.out.println("转账失败!余额为:"+studentss.getBalance());

            }
            break;
        }
        else {
            if(iterator.hasNext()==false){
                System.out.println("请输入正确账户!");
            }
        }
    }
}
//修改密码
public  static  void Changethepassword(ArrayList list){

    System.out.println("请输入账号:");
    Scanner cx = new Scanner(System.in);
    String account =cx.next();
    System.out.println("请输入账号原密码:");
    Scanner mc = new Scanner(System.in);
    String uesrpwds =mc.next();
    //迭代器
    Iterator<Studentss> iterator = list.iterator();
    while (iterator.hasNext()){//判断是否存在下一个对象元素
        Studentss  studentss =(Studentss) iterator.next();//获取下一元素
        //判断密码账号是否存在相等
        if(account.equals(studentss.getAccount())&&uesrpwds.equals(studentss.getUesrpwds()))
        {   Scanner mc1 = new Scanner(System.in);
            System.out.println("请输入账号新密码:");
            String uesrpwds1 =mc1.next();
            Scanner mc2 = new Scanner(System.in);
            System.out.println("请再次输入新密码:");
            String uesrpwds2 =mc2.next();
            if (uesrpwds1.equals(uesrpwds2)) {
                studentss.setUesrpwds(uesrpwds1);
                System.out.println("账号修改密码成功！");
                break;
            }else {
                System.out.println("两次密码不一样");
                break;
            }

        }else {
            if(iterator.hasNext()==false){
                System.out.println("请输入正确账户或密码!");
            }

        }
    }
}
}

注：(我的代码可以有些的纰漏，问题不是很大，基本逻辑写的差不多了，如果有问题，评论下，我虚心请教，希望我们的代码之路会越走越远！加油)