本文例項為大家分享了java銀行管理系統的具體程式碼，供大家參考，具體內容如下

賬戶類

package Account;
 
public abstract class Account {
  private int id;//賬號
  private String password;//密碼
  private String name;//姓名
  private String personId;//身份證號碼
  private String email;//郵箱
  private double ceiling;//貸款屬性
  private static double balance;//賬戶餘額
  
  public Account() {}
 
  public Account(int id,String password,String name,String personId,String email,double balance,double ceiling) {
    super();
    this.id = id;
    this.password = password;
    this.name = name;
    this.personId = personId;
    this.email = email;
    this.balance = balance;
    this.ceiling = ceiling;
  }
  public Account(int id,String email) {
    super();
    this.id = id;
    this.password = password;
    this.name = name;
    this.personId = personId;
    this.email = email;
  }
  public Account(int id,String password) {
    this.id =id;
    this.password = password;
  }
  //開戶函式
  public Account openAccount() {
    return null;
  }
  //顯示開戶成功的資訊函式
  public void show() {
    System.out.println("賬戶ID為 ： " + id + "密碼為： " + password + "姓名為： " + name + "身份證號碼為： " + personId + "郵箱為：  " + email);
  }
  //登入函式
  public void enter() {
    
  }
  //取款方法 為抽象方法
  public abstract void deposit(double money); 
    
  //存款方法
  public static void withdraw(double money) {
    balance = balance + money;
      System.out.println("您已經存入" + money + "元,賬戶餘額為" + balance );
  }
//  public abstract void requestLoan(double money);
 
  public double getCeiling() {
    return ceiling;
  }
 
  public void setCeiling(double ceiling) {
    this.ceiling = ceiling;
  }
 
  public int getId() {
    return id;
  }
  public void setId( int id) {
    this.id = id;
  }
 
  public String getPassword() {
    return password;
  }
 
  public void setPassword(String password) {
    this.password = password;
  }
 
  public String getName() {
    return name;
  }
 
  public void setName(String name) {
    this.name = name;
  }
 
  public String getPersonId() {
    return personId;
  }
 
  public void setPersonId(String personId) {
    this.personId = personId;
  }
 
  public String getEmail() {
    return email;
  }
 
  public void setEmail(String email) {
    this.email = email;
  }
 
  public double getBalance() {
    return balance;
  }
  public void setBalance(double balance) {
    this.balance = balance;
  }
 
  
  
}

Bank類

package Account;
 
import java.util.Scanner;
 
public class Bank {
  int i;// 賬戶編號
  private Account[] account = new Account[100];// 賬戶物件陣列
  private int accountNum = 0;// 賬戶數量
  private int type;// 賬戶型別
  private String password1;// 確認密碼
  int id = 100000;//第一個開戶賬號
  int j = 1;//常量控制開戶賬號每次+1
  Scanner sc = new Scanner(System.in);
  int insert;
 
  public Bank() {
  }
 
  // 主介面
  public void mainView() {
    System.out.println("******歡迎登入銀行管理系統********");
    System.out.println("******請選擇業務***************");
    System.out.println("******1、建立賬戶**************");
    System.out.println("******2、登入賬戶**************");
  }
 
  //功能選擇函式
  public void select() {
    int select = sc.nextInt();
    switch(select) {
    case 1 : this.openAccount();
    break;
    case 2 : this.enter();
    break;
    }
 
 
  }
 
  // 開戶函式
  public Account openAccount() {
    System.out.println("請輸入您的姓名");
    String name = sc.next();
 
    //    System.out.println("請輸入您的卡號");
    //    int id = sc.nextInt();
    System.out.println("請輸入您的密碼");
    String password = sc.next();
 
    System.out.println("請再次確認您的密碼");
    String password1 = sc.next();
    while (!password1.equals(password)) {
      System.out.println("對不起，兩次輸入的密碼不一致，請重新輸入");
      System.out.println("請重新輸入您的密碼");
      password = sc.next();
      System.out.println("請再次確認您的密碼");
      password1 = sc.next();
    }
 
    System.out.println("請輸入您的身份證號碼");
    String personId = sc.next();
 
    System.out.println("請輸入您的郵箱");
    String email = sc.next();
 
    System.out.println("請輸入您的賬戶型別");
    System.out.println("1、儲存卡            2、信用卡");
    type = sc.nextInt();
    switch (type) {
    case 1:
      account[accountNum] = new LoanSavingAccount(100000 + j,password,name,personId,email,0); // 建立儲存卡賬戶物件,初始餘額為0，預設貸款金額為0元
      account[accountNum].show();//呼叫顯示賬戶資訊函式
      System.out.println("卡型別為：儲存卡");
      accountNum++;
      j++;
      return account[accountNum];
    case 2:
      account[accountNum] = new LoanCreditAccount(100000 + j,5000); // 建立信用卡賬戶物件，多一個透資屬性,初始透資金額為5000元
      account[accountNum].show();//呼叫顯示賬戶資訊函式a
      System.out.println("卡型別為： 信用卡");
      accountNum++;
      j++;
      return account[accountNum];
    }
    return null;
 
  }
 
  // System.out.println("恭喜您，建立賬號成功啦！！！" + "您的賬號名為"+ account.getId() +
  // "您的賬戶型別為" + type);
  // return account;
 
  // 登入函式
  public Account enter() {
    System.out.println("請輸入您的銀行卡號");
    int id = sc.nextInt();
    System.out.println("請輸入您的密碼");
    String password = sc.next();
    if (accountNum == 0) {
      System.out.println("未註冊賬戶，請先註冊！");
      this.openAccount();
      this.mainView();
      this.select();
    } 
    boolean flag = false;
    for (i = 0; i < accountNum; i++) {
      if (id == account[i].getId() && password.equals(account[i].getPassword())) {//判斷Id和輸入的賬戶密碼是否一致
        flag = true;
        break;
      }
    }
    if (!flag) {
      System.out.println("登入失敗！！！");
    }
    if (flag) {
      System.out.println("登入成功!!!!");
      do {
        System.out.println("請選擇業務");
        System.out.println("******1、存款*****************");
        System.out.println("******2、取款*****************");
        System.out.println("******3、貸款*****************");
        System.out.println("******4、還款*****************");
        System.out.println("******3、按任意鍵退出*************");
        insert = sc.nextInt();
        switch(insert) {
        case 1 :   
          System.out.println("******請輸入存款金額*****************");
          int money = sc.nextInt();
          account[i].withdraw(money);                
          break;
 
        case 2:   System.out.println("******請輸入取款金額*****************");
        money = sc.nextInt();
        account[i].deposit(money);//呼叫取款方法
        break;
 
        case 3:   judge();
               break;
 
 
        case 4:   repay();
               break;
        }
      } while(insert == 1 || insert == 2 || insert == 3 || insert == 4);
 
    }  
    return account[i];
 
 
  }
 
  //存款方法
  public void withdraw() {
    System.out.println("請輸入存款金額");
    int money = sc.nextInt();
    account[i].withdraw(money);
  }
  //取款方法
  public void deposit() {
    System.out.println("請輸入取款金額");
    int money = sc.nextInt();
    account[i].deposit(200);
  }
 
  //計算銀行餘額總數方法
  public void Accountsum() {
    double savSum = 0;
    for (int i = 0; i < accountNum; i++) {
      savSum += account[i].getBalance();
    }
  }
 
  //判斷是LoanSavingAccount 類還是LoacCreditAccount
  //貸款方法
  public void judge() {
    System.out.println("******請輸入貸款金額*****************");
    int money = sc.nextInt();
    if (account[accountNum - 1] instanceof LoanSavingAccount) {
      LoanSavingAccount a = (LoanSavingAccount) account[accountNum - 1];
      a.requestLoan(money);
    }else {
      LoanCreditAccount b = (LoanCreditAccount) account[accountNum -1 ];
      b.requestLoan(money);
      System.out.println("成功呼叫了貸款方法");
    }
 
  }
 
  //還款方法
  public void repay() {
    System.out.println("******請輸入還款金額*****************");
    int money = sc.nextInt();
    if (account[accountNum - 1] instanceof LoanSavingAccount) {
//      System.out.println("判斷過了1");
      LoanSavingAccount a = (LoanSavingAccount) account[accountNum - 1];
      a.payLoan(money);
    }else {
//      System.out.println("判斷過了2");
      LoanCreditAccount b1 = (LoanCreditAccount) account[accountNum - 1];
      b1.payLoan(money);
    }
 
  }
 
 
}

信用卡類

package Account;
 
 
public class CreditAccount extends Account {  //信用卡
  private double overdraft;//透資屬性
  
  public CreditAccount() {}
 
  public CreditAccount(int id,double ceiling,double overdraft) {
    super(id,balance,ceiling);
    this.overdraft = overdraft;//多出一個透資屬性
  }
  
 
 
  //  public void withdraw(double money) {
//    super.setBalance(super.getBalance() + money);
//    System.out.println("你的卡號為" + super.getId() +"的卡，您已經存入" + money + "元,賬戶餘額為" + super.getBalance() );
//  }
  public void deposit(double money) {//信用卡取款方法
    if ((super.getBalance() + overdraft) >= money) {
       super.setBalance(super.getBalance() - money) ;
       System.out.println("您取了" + money + "錢,您的餘額為" + super.getBalance());
    }else System.out.println("對不起您的餘額和透支額度不足！");
    
    
  }
 
//  @Override
//  public void requestLoan() {
//    // TODO Auto-generated method stub
//    
//  }
  
 
}
 
 
package Account;
 
public interface General {
  void requestLoan(double money);//貸款方法
  void payLoan(double money);//還款
//  void getLoan();//獲取使用者總額
  
 
}

信用卡子類

package Account;
 
import java.util.Scanner;
 
 
public class LoanCreditAccount extends CreditAccount implements General {
  Scanner sc = new Scanner(System.in);
 
  public LoanCreditAccount(){}
  public LoanCreditAccount(int id,ceiling,overdraft);
  }
  public void requestLoan(double money) {//貸款方法
    if ( 0 <= money&& money <= 10000) {//貸款上限為10000
      System.out.println("貸款成功,您的貸款金額為: " + money);
      System.out.println("您還能貸款的金額為: " + (10000 - money));
      super.setCeiling(money);//把貸款的錢傳給貸款屬性
      super.setBalance(super.getBalance() + money);//更新餘額值
      System.out.println("您現在的餘額為： " + super.getBalance());
    }else {
      System.out.println("對不起您的額度不夠，貸款失敗！");
    }
  }
  public void payLoan(double money) {//還款
    //三個判斷條件：1. 還款金額小於等於貸款金額  2.還款金額小於所剩餘額 3.還款金額大於0
    
    if (super.getBalance() >= money && money <= super.getCeiling() && money >= 0) {
      super.setBalance(super.getBalance() - money); //更新餘額
      super.setCeiling(super.getCeiling() - money);
      System.out.println(" 您現在的餘額為" + super.getBalance());
      if (super.getCeiling() ==0) {
        System.out.println("您已經全部還清！！謝謝光臨!!");
      }else {
        
        System.out.println("您已經還了" + money +"您還需要還" + super.getCeiling() );
      }
    }else {
      System.out.println("對不起，您的賬戶餘額不足或者輸入的還款額度超出範圍！");
    }
    
  }
  public void getLoan() {//獲取使用者貸款總額
    double savSum = 0;
  };
 
}

package Account;
 
import java.util.Scanner;
 
import com_Day_7_11.SavingAccount;
 
 
//儲存卡子類
public class LoanSavingAccount extends SavingAccount implements General{
  Scanner sc = new Scanner(System.in);
 
 
  public LoanSavingAccount(int id,double ceiling) {
    super(id,ceiling);
    
  }
  public void requestLoan(double money) {//貸款方法
    if ( 0 <= money&& money <= 10000) {//貸款上限為10000
      System.out.println("貸款成功,您的貸款金額為: " + money);
      System.out.println("您還能貸款的金額為: " + (10000 - money));
      super.setCeiling(money);//把貸款的錢傳給貸款屬性
      super.setBalance(super.getBalance() + money);//更新餘額值
      System.out.println("您現在的餘額為： " + super.getBalance());
    }else {
      System.out.println("對不起您的額度不夠，貸款失敗！");
    }
  }
  public void payLoan(double money) {//還款
    //三個判斷條件：1. 還款金額小於等於貸款金額  2.還款金額小於所剩餘額 3.還款金額大於0
    
    if (super.getBalance() >= money && money <= super.getCeiling() && money >= 0) {
      super.setBalance(super.getBalance() - money); //更新餘額
      super.setCeiling(super.getCeiling() - money);
      System.out.println(" 您現在的餘額為" + super.getBalance());
      if (super.getCeiling() ==0) {
        System.out.println("您已經全部還清！！謝謝光臨!!");
      }else {
        
        System.out.println("您已經還了" + money +"您還需要還" + super.getCeiling() );
      }
    }else {
      System.out.println("對不起，您的賬戶餘額不足或者輸入的還款額度超出範圍！");
    }
    
  }
 
}

主介面測試函式

package Account;
 
import java.util.Scanner;
 
 
public class Text {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
 
    Bank b = new Bank();
    while (true) {
      b.mainView();//呼叫介面函式
      int select = sc.nextInt();
      switch(select) {
      case 1: b.openAccount();//建立賬戶
        break;
      case 2: b.enter();//登入
          break;  
      default: System.out.println("選擇業務異常，請重新選擇");
      break;
      }
      System.out.println("是否繼續選擇其他業務");
      System.out.println("退出請按  0");
      System.out.println("繼續選擇其他業務請按 1");
      select = sc.nextInt();
      if (select == 0) {
        break;
      }
    }
 
  }
 
}

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