銀行管理系統 (java實現)，供大家參考，具體內容如下

1.建立一個封裝類（Studentss）

import javax.naming.Name;

import javax.naming.NamingEnumeration;
 
 public class Studentss {

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

//定義一個數據類封裝
private String name;//名字
private String account;//賬號
private int balance;//餘額
private String uesrpwds;//密碼
private String card;//身份證號
private int id;//編號
//封裝id
public int getId(){
 return id;
}

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

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

//封裝賬號get
public String getAccount(){
 return account;
}

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

//封裝餘額get

public int getBalance() {
 return balance;
}

public void setBalance(int balance) {
 this.balance = balance;
}
//封裝密碼get
public String getUesrpwds() {
 return uesrpwds;
}
public void setUesrpwds(String uesrpwds) {
 this.uesrpwds = uesrpwds;
}
//封裝身份證get
public String getCard() {
 return card;
}
//set身份證
public void setCard(String card) {
 this.card = card;
}


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

2.實現增刪改查等效果 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<>();//宣告陣列

public static void main(String[] args) {
 Scanner sc = new Scanner(System.in);
 //初始化兩個資料
 Studentss studentss = new Studentss();
 studentss.setName("張穎穎");
 studentss.setAccount("17908064359");
 studentss.setBalance(2000);
 studentss.setUesrpwds("4321");
 studentss.setCard("510010619891231127");
 list.add(studentss);//初始化陣列 新增值

 Studentss studentss1 = new Studentss();
 studentss1.setName("劉華");
 studentss1.setAccount("17908064368");
 studentss1.setBalance(8000);
 studentss1.setUesrpwds("4567");
 studentss1.setCard("410207198904051271");
 list.add(studentss1);//初始化陣列 新增值
 // this.list =new ArrayList<>();
 //String pass =input.lenth();
 int input;
 //銀行增刪改查輸出

 System.out.println("賬戶姓名:張穎穎 賬號: 17908064359 存款餘額: 2000 密碼：4321 身份證號:510010619891231127");
 System.out.println("賬戶姓名:劉華 賬號: 17908064368 存款餘額: 8000 密碼：4567 身份證號:410207198904051271");
 do {

  System.out.println("=====================歡迎使用知道銀行服務====================");
  System.out.println("1:開戶 2:存款 3: 取款 4: 轉賬 5:查餘額 6:修改密碼 0:退出");
  System.out.println("===========================================================");
  //判斷輸出選項
  Scanner set = new Scanner(System.in);//接受輸入的值（0~6）;
  input =set.nextInt();
  switch (input){
   case 1://開戶
    Openaccount(list);
    break;
   case 2://存款
    CunKuang(list);
    break;
   case 3://取款
    Qukuang(list);
    break;
   case 4://轉賬
    Zhuangzhang(list);
    break;
   case 5://查詢餘額
    Chaxun(list);

    break;
   case 6://修改密碼
    Changethepassword(list);
    break;
   case 0://退出
    System.out.println("謝謝使用!");
    break;
   default:
    System.out.println("請輸入指定的命令語句！");
    break;



  }
 }while (input != 0);

}
//開戶
public static void Openaccount(ArrayList<Studentss> list){
 Studentss studentss =new Studentss();
 int RDnum=(int)((Math.random()*9+1)*1000);//定義資料數
 Scanner sc=new Scanner(System.in);
 System.out.println("請輸入使用者名稱:");
 String name = sc.next();
 studentss.setName(name);//接收輸出
 //list.add(studentss.getName());//儲存資料


 System.out.println("請輸入賬號密碼:");
 String uesrpwds=sc.next();
 studentss.setUesrpwds(uesrpwds);//接收輸出
 //list.add(studentss.getUesrpwds());//儲存資料

 System.out.println("請輸入身份證號:");
 String card= sc.next();
 studentss.setCard(card);//接收輸出
 //list.add(studentss.getCard());//儲存資料
  System.out.println("請輸入金額:");
  int balance=sc.nextInt();
  studentss.setBalance(balance);//接收輸出
  //list.add(studentss.getBalance());//儲存資料

  String account="1790806"+RDnum; //賬號:
  studentss.setAccount(account);//接收輸出
  //list.add(studentss.getAccount());//儲存資料
  System.out.println("賬號:"+account);
  System.out.println("賬號名:"+name);
  System.out.println("餘額:"+balance);
  System.out.println("建立成功!");

  list.add(studentss);





 }
 //查詢金額

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

 Scanner cx2 = new Scanner(System.in);

 System.out.println("請輸入賬號:");

 String account = cx2.next();
 
 System.out.println("請輸入賬號密碼:");
 
 Scanner mc2 = new Scanner(System.in);
 
 String uesrpwds = cx2.next();
 
 Iterator<Studentss> iterator = list.iterator();
 while (iterator.hasNext()) {//判斷是否存在下一個物件元素  
   Studentss studentss = (Studentss) iterator.next();//獲取下一元素
  if (account.equals(studentss.getAccount()) && 
uesrpwds.equals(studentss.getUesrpwds())) {
   System.out.println("賬號的金額為:" + studentss.getBalance()); 
   break;
 
  }
 
 }
 
}
//存款
public static void CunKuang(ArrayList<Studentss> list){
 //物件
 // Studentss studentss= new Studentss();
 System.out.println("請輸入賬號:");
 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("請輸入存款金額:");
    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!餘額為:"+studentss.getBalance());
     break;
    }else {
     System.out.println("存款失敗!餘額為:"+studentss.getBalance());
     break;
    }

   }
   else {

  } if(iterator.hasNext() ==false){
  System.out.println("查無賬號!");
 }
}




}
//取款
public static void Qukuang(ArrayList<Studentss> list){
 Scanner cx = new Scanner(System.in);
 System.out.println("請輸入賬號:");
 String account =cx.next();
 Scanner mc = new Scanner(System.in);
 System.out.println("請輸入賬號密碼:");
 String uesrpwds =mc.next();
 //迭代器
 Iterator<Studentss> iterator = list.iterator();
 while (iterator.hasNext()){//判斷是否存在下一個物件元素
  Studentss studentss =(Studentss) iterator.next();//獲取下一元素
  //判斷密碼賬號是否存在相等
  if(account.equals(studentss.getAccount())&&uesrpwds.equals(studentss.getUesrpwds()))
  {
   System.out.println("請輸入取款金額:");
   Scanner mcx =new Scanner(System.in);
   int mic =mcx.nextInt();
   studentss.setBalance(studentss.getBalance()-mic);
   if (mic>studentss.getBalance()){
    System.out.println("取款失敗！");
   }else {
   System.out.println("取款成功!餘額為:"+studentss.getBalance());
   }
   break;


  }else {
   if(iterator.hasNext() ==false){
    System.out.println("賬號或者密碼不存在!");
   }
  }
 }

}
//轉賬
public static void Zhuangzhang(ArrayList list){
 Scanner input = new Scanner(System.in);// 賦值一個輸入值
 System.out.println("請輸入轉出賬號:");
 String account =input.next();
 System.out.println("請輸入轉出賬戶密碼:");
 String pwd1=input.next();
 System.out.println("請輸入轉入賬號:");
 String account1=input.next();
 //迭代器
 Iterator<Studentss> iterator=list.iterator();
 while (iterator.hasNext()){
  Studentss studentss=iterator.next();
  //判斷轉出賬戶是否存在
  if (account.equals(studentss.getAccount())&&pwd1.equals(studentss.getUesrpwds()) ) {
   System.out.println("請輸入轉出金額");
   int moneys=input.nextInt();
   //判斷轉出賬戶金額是否大於或小於所需要金額
   if (studentss.getBalance()>=moneys){
    //迭代器在迭代一次
    Iterator<Studentss> iterator1=list.iterator();
    while (iterator1.hasNext()){
     Studentss studentss1=iterator1.next();
     //判斷轉入賬戶是否存在
     if (account1.equals(studentss1.getAccount())&&account!=account1){
      //滿足條件轉出賬戶扣除金額
      studentss.setBalance(studentss.getBalance()-moneys);
      //滿足條件轉入賬戶存入金額
      studentss1.setBalance(studentss1.getBalance()+moneys);
      System.out.println("轉賬成功,轉出賬號:" +studentss.getAccount()+ "轉出金額:" +studentss.getBalance()
      +"轉入賬號:" +studentss1.getAccount()+ "轉入金額" +studentss1.getBalance());
      break;
     }


    }
    break;
   }
   else {
    System.out.println("轉賬失敗!餘額為:"+studentss.getBalance());

   }
   break;
  }
  else {
   if(iterator.hasNext()==false){
    System.out.println("請輸入正確賬戶!");
   }
  }
 }
}
//修改密碼
public static void Changethepassword(ArrayList list){

 System.out.println("請輸入賬號:");
 Scanner cx = new Scanner(System.in);
 String account =cx.next();
 System.out.println("請輸入賬號原密碼:");
 Scanner mc = new Scanner(System.in);
 String uesrpwds =mc.next();
 //迭代器
 Iterator<Studentss> iterator = list.iterator();
 while (iterator.hasNext()){//判斷是否存在下一個物件元素
  Studentss studentss =(Studentss) iterator.next();//獲取下一元素
  //判斷密碼賬號是否存在相等
  if(account.equals(studentss.getAccount())&&uesrpwds.equals(studentss.getUesrpwds()))
  { Scanner mc1 = new Scanner(System.in);
   System.out.println("請輸入賬號新密碼:");
   String uesrpwds1 =mc1.next();
   Scanner mc2 = new Scanner(System.in);
   System.out.println("請再次輸入新密碼:");
   String uesrpwds2 =mc2.next();
   if (uesrpwds1.equals(uesrpwds2)) {
    studentss.setUesrpwds(uesrpwds1);
    System.out.println("賬號修改密碼成功！");
    break;
   }else {
    System.out.println("兩次密碼不一樣");
    break;
   }

  }else {
   if(iterator.hasNext()==false){
    System.out.println("請輸入正確賬戶或密碼!");
   }

  }
 }
}
}

注：(我的程式碼可以有些的紕漏，問題不是很大，基本邏輯寫的差不多了，如果有問題，評論下，我虛心請教，希望我們的程式碼之路會越走越遠！加油)

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