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這篇文章將為大家詳細講解有關java怎么實現銀行管理系統，小編覺得挺實用的，因此分享給大家做個參考，希望大家閱讀完這篇文章后可以有所收獲。
具體內容如下
Bank類
package First;
import java.util.TreeSet;
//銀行類
public class Bank {
private String Bankname = "坑對對銀行"; //銀行名稱
TreeSet<User> holder = null; //銀行存儲的信息
private static Bank INSTANCE = new Bank();
private Bank() {} //私有化銀行類
public static Bank getInstance() {
// TODO Auto-generated method stub
return INSTANCE;
}
//存款功能
public void saveMoney(User user,double money) {
//初始金額與存入金額相加
double sum = user.getSum()+money;
user.setSum(sum);
System.out.print(money+"存款成功!!!"+",當前余額是:"+user.getSum());
System.out.print("\n");
}
//取款功能
public void drawMoney(User user,double money,String pw) {
if(user.getPw().equals(pw)) { //先判斷取款密碼
if(user.getSum()>=money) { //判斷余額
user.setSum(user.getSum()-money);
System.out.print("取款成功");
System.out.print("\n");
System.out.print("當前余額為:"+"\t"+user.getSum());
System.out.print("\n");
}else {
System.out.print("抱歉余額不足!!! 當前余額:"+user.getSum());
System.out.print("\n");
}
}
}
//查看余額以及信息
public void looksum(User user) {
System.out.print("姓名:"+user.getName()+",賬號:"+user.getAccount()+",余額:"+user.getSum());
System.out.print("\n");
}
//歡迎語句
public void welcom(User user) {
if(user.getSexual().equals("男")) {
System.out.print(user.getName()+" 先生!!"+" "+(this.Bankname)+" 歡迎您!!!");
System.out.print("\n");
}else if(user.getSexual().equals("女")){
System.out.print(user.getName()+" 女士!!"+" "+(this.Bankname)+" 歡迎您!!!");
System.out.print("\n");
}
}
//再見語句
public void GoodBye(User user) {
if(user.getSexual().equals("男")) {
System.out.print(user.getName()+" 先生!!"+" "+(this.Bankname)+" 祝您生活愉快!!!");
System.out.print("\n");
}else if(user.getSexual().equals("女")){
System.out.print(user.getName()+" 女士!!"+" "+(this.Bankname)+" 祝您生活愉快!!!");
System.out.print("\n");
}
}
}Data:數據存儲類
package First;
import java.util.TreeSet;
//模擬一個數據庫
//銀行的數據庫
public class Data {
TreeSet<User> holder = new TreeSet<User>(new MyComparator()); //用于存儲用戶信息的容器---自定義比較規則
File file = File.getFile(); //獲取一個文件類
private static Data data = new Data();
//單例模式--因為存儲數據的類唯一.所以不能隨意被實例化
private Data() {} //私有化構造方法
public static Data getData() { //提供返回該對象的靜態方法
return data;
}
//添加用戶
public void addUser(User user) {
holder.add(user);
System.out.print("注冊成功!!");
System.out.print("\n");
}
//刪除用戶
public void removeUser(User user) {
if(holder.contains(user)) { //如果容器中包含所user對象,則移除對象
holder.remove(user);
}else { //如果不包含則打印語句
System.out.print("抱歉請檢查輸入的信息是否正確");
System.out.print("\n");
}
}
//獲取容器
public TreeSet<User> getHolder() {
return holder;
}
//寫入容器
public void setHolder(TreeSet<User> holder) {
this.holder = holder;
}
}FIie:文件IO類
package First;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Iterator;
import java.util.TreeSet;
/*
* 文件類--負責向內存中初始化信息以及程序結束后向內存中存入信息
* */
public class File {
TreeSet<User> holder = Data.getData().getHolder(); //從Data數據庫中獲取容器
//文件類只供使用不能被任意實際化
public static File FILE; //私有化一個File類
private File() {};
public static File getFile() { //對外界提供獲取方法
return FILE;
}
//保存到文件里
public static void SaveToFile(TreeSet<User> list) { //將獲取到的容器存入到文件中----序列化
ObjectOutputStream oo = null;
try {
oo = new ObjectOutputStream(new FileOutputStream(".\\src\\Test\\text1.txt")); //獲取文件存儲地址
oo.writeObject(list); //將容器寫入
} catch (Exception ex) {
ex.printStackTrace();
}finally {
try {
oo.close(); //將流關閉
}catch(IOException e) {
e.printStackTrace();
}
}
}
//從文件里讀取
public static TreeSet<User> ReadFromFile() {
ObjectInputStream ois = null;
TreeSet<User> list = null;
try {
ois = new ObjectInputStream(new FileInputStream(".\\src\\Test\\text1.txt"));//反序列化從文件中獲取容器加載到內存
list = Data.getData().getHolder(); //獲取容器
list = (TreeSet<User>) ois.readObject(); //從流中獲取對象
Iterator it = list.iterator(); //迭代器
System.out.print("當前用戶信息:");
System.out.print("\n");
System.out.print("\n");
while(it.hasNext()) { //迭代初始信息
User user = (User) it.next();
System.out.print("\t"+"姓名:"+user.getName()+"\t"+"賬號:"+user.getAccount()+"\t"+"密碼:"+user.getPassword()+"\t"+"余額:"+user.getSum()+"\t");
System.out.print("\n");
System.out.print("\n");
}
} catch (Exception ex) {
ex.printStackTrace();
}finally {
try {
ois.close(); //將流關閉
}catch(IOException e){
e.printStackTrace();
}
}
return list;
}
}MyComparator:自定義比較器類
package First;
import java.io.Serializable;
import java.util.Comparator;
//自定義比較器
//想要存入集合必須實現序列化和反序列化
public class MyComparator implements Comparator,Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public int compare(Object arg0, Object arg1) {
User user1 = (User)arg0; //重寫比較方法 --- 強轉成User類型
User user2 = (User)arg1;
return user1.getAccount().compareTo(user2.getAccount());//比較兩個銀行賬戶
}
}Operate：系統核心
package First;
import java.util.Iterator;
import java.util.Scanner;
import java.util.TreeSet;
//后臺操作系統
//后臺管理員
public class Operate {
Scanner sc = new Scanner(System.in); //鍵盤錄入
TreeSet<User> holder = Data.getData().getHolder(); //從Data數據庫中獲取容器
Bank bank = Bank.getInstance(); //獲取一個銀行類
File file = File.getFile(); //獲取一個文件類
//登錄菜單
public void registerMenu(){
System.out.print("****************************");
System.out.print("\n");
System.out.print("\n");
System.out.print(" 歡迎來到坑多多銀行登錄系統!!!\n");
System.out.print("\n");
System.out.print("****************************");
System.out.print("\n");
System.out.print("\n");
holder = File.ReadFromFile(); //從文件中獲取容器
Data.getData().setHolder(holder); //把從文件中獲取容器存儲到數據庫中
int str=1; //從鍵盤獲取數字
while(str!=0) {
System.out.print("****************************");
System.out.print("\n");
System.out.print(" 1: 登錄 ");
System.out.print("\n");
System.out.print(" 2: 注冊 ");
System.out.print("\n");
System.out.print(" 3: 忘記密碼");
System.out.print("\n");
System.out.print(" 4: 注銷用戶");
System.out.print("\n");
System.out.print(" 0: 退出");
System.out.print("\n");
System.out.print("****************************");
System.out.print("\n");
System.out.print("請輸入:");
str = sc.nextInt();
switch(str){ //根據用戶輸入的值進行選擇
case 1:
System.out.print("請輸入您的賬號:");
String account = sc.next(); //從鍵盤中獲取錄入用戶名
System.out.print("請輸入您的密碼:");
String pw = sc.next(); //從鍵盤中錄入密碼
User user = logon(holder,account,pw);
if(user!=null) { //判斷是否登錄成功
System.out.print("登錄成功!!!!歡迎使用");
System.out.print("\n");
System.out.print("正在跳轉到銀行操作界面.........");
System.out.print("\n");
this.BankMenu(user); //如果登錄成功則將user對象傳入到銀行操作界面并跳轉
}else {
System.out.print("登錄失敗!!!請從新輸入"); //如果登錄失敗打印此語句
System.out.print("\n");
}
break;
case 2:
this.logon(); //調用注冊方法
break;
case 3:
this.modify(); //調用修改方法
break;
case 4:
holder = logout(holder); //調用刪除操作
break;
case 0:
File.SaveToFile(holder); //退出系統式將信息保存到文件中
System.out.print("再見!!!!");
System.out.print("\n");
default:
System.out.print("輸入錯誤!!!!");
System.out.print("\n");
}
}
}
//登錄方法
public User logon(TreeSet<User> holder,String account,String pw) {
Iterator<User> it = holder.iterator(); //獲取迭代器
while(it.hasNext()) {
User user = it.next();
if(user.getAccount().equals(account)&&user.getPassword().equals(pw)){
System.out.print("登錄成功!!");
System.out.print("\n");
return user;
}
}
System.out.print("賬戶或密碼錯誤 登錄失敗!!");
System.out.print("\n");
return null;
}
//注冊方法體
public void logon(){
System.out.print("歡迎來到注冊界面!!!!");
System.out.print("\n");
String name; //用戶名
String account; //銀行賬號
String password; //密碼
String pw; //取款密碼
double sum; //賬戶金額
String sexual; //性別
User user = new User(); //先創建一個空參的user對象
boolean flag = true; //語句的開關
while(flag) { //將注冊的信息依次輸入
switch(1) {
case 1:
System.out.print("請輸入姓名:"); //依次從鍵盤中獲取對應的姓名----正則表達式
name = sc.next();
user.setName(name); //將名字寫入對象中
case 2:
System.out.print("請輸入賬號(9位數字):");
account = sc.next(); //從鍵盤中獲取賬號
String reges ="[0-9]{9}"; //正則表達式規則對賬號進行限制
if(!account.matches(reges)) { //如果不符合要求則報錯
System.out.print("賬號不符合規范!!");
System.out.print("\n");
System.out.print("請重新注冊");
System.out.print("\n");
break;
}
user.setAccount(account); //將賬號寫入對象中
case 3:
System.out.print("請輸入密碼(6位):");
password = sc.next();
reges ="[0-9]{6}"; //正則表達式規則
if(!password.matches(reges)){ //如果密碼不符合正則規則則報錯
System.out.print("密碼不符合規范!!");
System.out.print("\n");
System.out.print("請重新注冊");
System.out.print("\n");
break;
}
user.setPassword(password); //將密碼寫入對象中
case 4:
System.out.print("請輸入取款密碼(6位):");
pw = sc.next();
reges ="[0-9]{6}"; //正則表達式規則
if(!pw.matches(reges)) {
System.out.print("取款密碼不符合規范!!");
System.out.print("\n");
System.out.print("請重新注冊");
System.out.print("\n");
break;
}
user.setPw(pw); //將取款密碼寫入到對象中
case 5:
System.out.print("請輸入金額:");
sum = sc.nextDouble();
user.setSum(sum); //將金額寫入到對象中
case 6:
System.out.print("請輸入性別:");
sexual = sc.next();
user.setSexual(sexual); //將性別寫入到對象中
case 7:
if(!holder.contains(user)){
Data.getData().addUser(user); //一切準確無誤后將user存入數據庫Data中
}
else {
System.out.print("用戶存在!!!");
System.out.print("\n");
//結束循環
}
flag = false;
break;
}
}
}
//忘記密碼操作
public void modify() {
boolean flag = true;
Iterator<User> it = holder.iterator(); //獲取迭代器
System.out.print("請輸入賬戶:");
String account = sc.next(); //從鍵盤中獲取賬戶
while(it.hasNext()) {
User user = it.next();
if(user.getAccount().equals(account)){ //如果容器中有這個對象則對它進行修改
System.out.print("請輸入新賬戶的密碼:");
String pw = sc.next(); //從監盤上錄入新的密碼
String reges ="[0-9]{6}"; //正則表達式規則
if(!pw.matches(reges)) { //如果密碼不符合正則規則則報錯
System.out.print("密碼不符合規范!!");
System.out.print("\n");
}else { //正則表達式判斷是否符合條件
holder.remove(user); //先從原容器中刪除user
user.setPassword(pw); //修改user的屬性
holder.add(user); //然后再向容器中添加
System.out.print("修改成功!!!");
System.out.print("\n");
flag = false;
break;
}
}
}
if(flag) {
System.out.print("沒有找到該用戶");
System.out.print("\n");
}
}
//注銷方法
public TreeSet<User> logout(TreeSet<User> list) {
String username; //用戶名
String password; //密碼
System.out.print("請輸入用戶賬號:");
username = sc.next(); //從鍵盤錄入用戶名
System.out.print("請輸入密碼:");
password = sc.next(); //從鍵盤錄入密碼
Iterator it = list.iterator(); //獲取迭代器
while(it.hasNext()) {
User user = (User)it.next(); //獲取對象
if(user.getAccount().equals(username)&&user.getPassword().equals(password)){
list.remove(user); //如果錄入的信息匹配則從容器中刪除user對象
System.out.print("注銷成功!!");
System.out.print("\n");
return list;
}
}
System.out.print("賬號或者密碼錯誤"); //不匹配打印提示語句
System.out.print("\n");
return list;
}
//銀行操作界面
public void BankMenu(User user) {
bank.welcom(user); //銀行調用歡迎語句
System.out.print("****************************");
System.out.print("\n");
System.out.print("\n");
System.out.print(" 歡迎來到坑多多銀行擦操作系統!!!\n");
System.out.print("\n");
int str = 1;
while(str!=0) {
System.out.print("****************************");
System.out.print("\n");
System.out.print(" 1: 取錢 ");
System.out.print("\n");
System.out.print(" 2: 存錢 ");
System.out.print("\n");
System.out.print(" 3: 查看余額");
System.out.print("\n");
System.out.print(" 0: 退出登錄");
System.out.print("\n");
System.out.print("****************************");
System.out.print("\n");
System.out.print("\n");
System.out.print("請輸入您的選項:"); //從鍵盤中讀取字符串
str = sc.nextInt();
switch(str){ //根據用戶輸入的值進行選擇
case 1: //取錢選項
System.out.print("請輸入取款密碼:");
String pw = sc.next(); //從鍵盤獲取輸入的密碼
if(user.getPw().equals(pw)) { //將輸入的取款密碼與用戶的密碼進行比對:如果相同則繼續執行
System.out.print("請輸入取款金額:");
double money = sc.nextDouble(); //從鍵盤獲取輸入的金額
if(money>=0) { //判斷金額是否有誤
bank.drawMoney(user, money, pw); //調用取款方法
}else {
System.out.print("輸入金額錯誤!!!");
System.out.print("\n");
}
}else {
System.out.print("輸入密碼有誤!!!");
System.out.print("\n");
}
break;
case 2:
System.out.print("請輸入取款金額:");
System.out.print("\n");
double money1 = sc.nextDouble(); //從鍵盤獲取輸入的金額
if(money1>=0) { //判斷金額是否有誤
bank.saveMoney(user, money1);; //調用存款方法
}else {
System.out.print("輸入金額錯誤!!!");
System.out.print("\n");
}
break;
case 3:
bank.looksum(user); //調用銀行---查詢賬戶操作
break;
case 0:
bank.GoodBye(user); //調用結束語句
break;
default:
System.out.print("輸入錯誤");
System.out.print("\n");
}
}
}
}User類:
package First;
import java.io.Serializable;
/*
* 這是一個User類
* */
public class User implements Serializable{
/**
* 實現接口,用于序列化和反序列化
*/
private static final long serialVersionUID = 1L;
private String name; //用戶名
private String account; //銀行賬號
private String password; //密碼
private String pw; //取款密碼
private double sum; //賬戶金額
private String sexual; //性別
//獲取用戶名
public String getName() {
return name;
}
//寫入用戶名
public void setName(String name) {
this.name = name;
}
//獲取賬號
public String getAccount() {
return account;
}
//寫入賬號
public void setAccount(String account) {
this.account = account;
}
//獲取密碼
public String getPassword() {
return password;
}
//修改密碼
public void setPassword(String password) {
this.password = password;
}
//查看余額
public double getSum() {
return sum;
}
//修改余額
public void setSum(double sum) {
this.sum = sum;
}
//寫入性別
public String getSexual() {
return sexual;
}
//修改性別
public void setSexual(String sexual) {
this.sexual = sexual;
}
//獲取取款密碼
public String getPw() {
return pw;
}
//寫入取款密碼
public void setPw(String pw) {
this.pw = pw;
}
//hashCode比較方法
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((account == null) ? 0 : account.hashCode());
result = prime * result + ((name == null) ? 0 : name.hashCode());
result = prime * result + ((password == null) ? 0 : password.hashCode());
result = prime * result + ((pw == null) ? 0 : pw.hashCode());
result = prime * result + ((sexual == null) ? 0 : sexual.hashCode());
long temp;
temp = Double.doubleToLongBits(sum);
result = prime * result + (int) (temp ^ (temp >>> 32));
return result;
}
//equals比較方法
/*
* 知識點:
* public boolean equals(Object obj)名稱不可改變
* */
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
User other = (User) obj;
if (account == null) {
if (other.account != null)
return false;
} else if (!account.equals(other.account))
return false;
if (name == null) {
if (other.name != null)
return false;
} else if (!name.equals(other.name))
return false;
if (password == null) {
if (other.password != null)
return false;
} else if (!password.equals(other.password))
return false;
if (pw == null) {
if (other.pw != null)
return false;
} else if (!pw.equals(other.pw))
return false;
if (sexual == null) {
if (other.sexual != null)
return false;
} else if (!sexual.equals(other.sexual))
return false;
if (Double.doubleToLongBits(sum) != Double.doubleToLongBits(other.sum))
return false;
return true;
}
//初始化用戶
User(String name,String account,String password,String pw,double sum,String sexual){
this.name = name;
this.account = account;
this.password = password;
this.sum = sum;
this.sexual = sexual;
this.pw = pw;
}
//空參構造函數
User(){
}
}Main()類
package First;
public class Test {
//測試類----唯一的主函數
public static void main(String[] args) {
Operate operate = new Operate();
operate.registerMenu(); //調用登錄方法
}
}關于“java怎么實現銀行管理系統”這篇文章就分享到這里了，希望以上內容可以對大家有一定的幫助，使各位可以學到更多知識，如果覺得文章不錯，請把它分享出去讓更多的人看到。
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