Java如何实现银行账户管理子系统
Java如何实现银行账户管理子系统
发布时间：2022-05-27 16:31:35 来源：高防服务器网 阅读：96 作者：iii 栏目：开发技术
本文小编为大家详细介绍“Java如何实现银行账户管理子系统”，内容详细，步骤清晰，细节处理妥当，希望这篇“Java如何实现银行账户管理子系统”文章能帮助大家解决疑惑，下面跟着小编的思路慢慢深入，一起来学习新知识吧。
所用到的知识点：面向对象基础语法,封装，方法覆盖（重写）、继承、多态
话不多说，直接上代码
Account.java
package com.task1; import java.util.Scanner; public class Account { //规定账户类型： //0 – 储蓄账户 1 – 信用账户 2 – 可贷款储蓄账户 3– 可贷款信用账户 private Long id ;//账户号码 private String password;//账户密码 private String name;//真实姓名 private String personId;//身份证号码 private String email;//客户的电子邮箱 private double balance;//账户余额 private int type;//账户类型 //无参的构造方法 public Account(){ } //有参的构造方法 public Account(long id, String password, String name, String personId, String email, double balance, int type) { super(); this.id = id; this.password = password; this.name = name; this.personId = personId; this.email = email; this.balance = balance; this.type = type; } //get、set方法 public Long getId() { return id; } public void setId(long 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; } public int getType() { return type; } public void setType(int type) { this.type = type; } //存款 public Account deposit(double money ) { this.balance+= money; //余额增加 return this; } //取款 public Account withdraw(double money) { if(balance - money >= 0) { //判断余额是否足够 balance -= money; //余额减少 // System.out.println("存款成功"); } else { System.out.println("您的余额不足！"); } return this; } //重写toString方法 @Override public String toString() { return "Account [id=" + id + ", password=" + password + ", name=" + name + ", personId=" + personId + ", email=" + email + ", balance=" + balance + ", type=" + type + "]"; } }
SavingAccount.java
package com.task1; public class SavingAccount extends Account { public SavingAccount() { super(); // TODO Auto-generated constructor stub } public SavingAccount(long id, String password, String name, String personId, String email, double balance, int type) { super(id, password, name, personId, email, balance, type); // TODO Auto-generated constructor stub } @Override public String toString() { return "SavingAccount [getId()=" + getId() + ", getPassword()=" + getPassword() + ", getName()=" + getName() + ", getPersonId()=" + getPersonId() + ", getEmail()=" + getEmail() + ", getBalance()=" + getBalance() + ", getType()=" + getType() + "]"; } }
CreditAccpunt.java
package com.task1; public class CreditAccount extends Account{ private double ceiling; public CreditAccount() { super(); } public CreditAccount(long id, String password, String name, String personId, String email, double balance, int type,double ceiling) { super(id, password, name, personId, email, balance, type); this.ceiling = ceiling; } public double getCeiling() { return ceiling; } public void setCeiling(double ceiling) { this.ceiling = ceiling; } @Override public String toString() { return "CreditAccount [getCeiling()=" + getCeiling() + ", getId()=" + getId() + ", getPassword()=" + getPassword() + ", getName()=" + getName() + ", getPersonId()=" + getPersonId() + ", getEmail()=" + getEmail() + ", getBalance()=" + getBalance() + ", getType()=" + getType() + "]"; } @Override public Account withdraw(double money) { if(getBalance() >= money) { setBalance(getBalance() - money); }else if(getBalance() + getCeiling() >= money) { setCeiling(getCeiling()-(money-getBalance())); setBalance(0); }else { System.out.println("对不起，您的余额不足"); } return this; } }
Bank.java
package com.task1; import java.util.Scanner; public class Bank { int index = 0; //当前用户数量 Account [] accounts = new Account [100];//数据库 Account account = null; /* * 用户开户(register) 参数列表: Long 账号, String密码, String确认密码,String 姓名,String身份证号码,String邮箱,int 账户类型； (Long id, String password, String repassword, String name, String personID, String email, int type) 返回类型：Account 规定账户类型：0 – 储蓄账户 1 – 信用账户 2 – 可贷款储蓄账户 3– 可贷款信用账户 */ //用户开户 public Account register(Long id, String password, String repassword, String name, String personId, String email, int type) { if(password.equals(repassword)) { // 判断两次输入密码是否一致 switch (type) { //根据用户类型创建不同账户 case 0: account = new SavingAccount(id, repassword, name, personId, email, 0, type); //创建储蓄账户 break; case 1: account = new CreditAccount(id, repassword, name, personId, email, 0, type,1000); //创建信用账户 } accounts[index++] = account; //账户信息存到数据库，用户数量+1 } // else { // System.out.println("两次输入的密码不一致"); // } return account; } //用户登录 public Account login(Long id, String password) { int find = searchIdPassword(index, id, password); //当前用户数组下标 if(find >= 0) { //判断账户密码是否正确 // System.out.println("登录成功"); return accounts[find]; //返回当前对象 } // else { // System.out.println("用户名密码错误"); // } return null; //如果账户密码错误返回空 } //用户存款 public Account deposit(Long id, double money) { int find = searchId(index, id);当前用户数组下标 if(find >= 0) { //判断账户是否存在 accounts[find].deposit(money); //调用Account类的存款方法 // System.out.println("存款成功"); return accounts[find]; //返回当前对象 // accounts[find].setBalance(accounts[find].getBalance()+money); } // else { // System.out.println("用户不存在"); // } return null; //如果账户不存在返回空 } //用户取款 public Account withdraw(Long id, String password, double money) { int find = searchIdPassword(index, id, password);//当前用户数组下标 if(find >= 0) { //判断账户密码是否正确 accounts[find].withdraw(money); //调用当前对象的取款方法 // System.out.println("取款成功"); return accounts[find]; //返回当前对象 } return null; } //设置透支额度 public Account updateCeiling(Long id, String password, double money) { int find = searchIdPassword(index, id, password);//获取当前用户数组下标 if((find >= 0) && (accounts[find].getType()) == 1){ //判断账户号码和密码是否正确，账户类型是否为信用账户 ((CreditAccount)accounts[find]).setCeiling(((CreditAccount)accounts[find]).getCeiling() + money); //调用set方法设置透支额度 return accounts[find]; } return null; } // 转账功能 // 参数：from转出账户，passwordFrom 转出账号的密码，to转入账户，money转账的金额 public boolean transfer(Long from, String passwordFrom, Long to, double money) { int find = searchIdPassword(index, from, passwordFrom); //转账账户数组下标 int find2 = searchId(index, to); //收款账户数组下标 if(find >= 0 && find2 >= 0 && accounts[find].getBalance() >= money) { //判断转账账户密码、收款账户是否匹配，判断转账用户余额是否足够 accounts[find].withdraw(money);//转账用户转账操作==取款 accounts[find2].deposit(money);//收款用户 == 存款 return true; } return false; } //统计银行所有账户余额总数 public double balanceSum() { double sum = 0; //初始化所有账户余额 for(int i = 0; i < index; i++) { //遍历数组 sum += accounts[i].getBalance();//求和(账户余额) } return sum; } //统计所有信用账户透支额度总数 public double ceilingSum() { double sum = 0; //初始化所有透支额度和 for(int i = 0; i < index; i++) { //遍历 if(accounts[i].getType() == 1) { //判断账户类型是否为信用账户 sum += ((CreditAccount)accounts[i]).getCeiling(); //求和 } } return sum; } //搜索Id与密码返回数组下标位置 public int searchIdPassword(int index, Long id, String password) { for(int i = 0; i < index; i++) { if(id.equals(accounts[i].getId()) && password.equals(accounts[i].getPassword())){ //比较账户和密码是否匹配 return i ; //匹配则返回账户数组下标 } } return -1; //不匹配则返回-1 } //搜索Id public int searchId(int index, Long id) { for(int i = 0; i < index; i++) { if(id.equals(accounts[i].getId())){ //比较账户是否匹配 return i ; //匹配则返回账户数组下标 } } return -1; //不匹配则返回-1 } }
TestAccount.java
package com.task1; public class TestAccount { public static void main(String[] args) { Account a =new Account(123456L, "123456","张三", "421356", "tt@tt.com", 100.0, 0); System.out.println(a); } }
TestBank.java
package com.task1; import java.util.Scanner; public class TestBank { public static void main(String[] args) { Scanner sc = new Scanner(System.in); Bank bank = new Bank(); String action =null; do { System.out.println("菜单："); System.out.println("---[1.开户]---"); System.out.println("---[2.登录]---"); System.out.println("---[3.存款]---"); System.out.println("---[4.取款]---"); System.out.println("---[5.设置透支额度]---"); System.out.println("---[6.转账]---"); System.out.println("请选择服务"); int choice =sc.nextInt(); switch(choice) { case 1: //开户 System.out.println("请输入账户号码："); Long id = sc.nextLong(); System.out.println("请输入账户密码："); String password = sc.next(); System.out.println("请确认账户密码："); String repassword = sc.next(); System.out.println("请输入真实姓名："); String name = sc.next(); System.out.println("请输入身份证号："); String personId = sc.next(); System.out.println("请输入电子邮箱："); String email = sc.next(); System.out.println("请输入账户类型：0 – 储蓄账户 1 – 信用账户 2 – 可贷款储蓄账户 3– 可贷款信用账户"); int type = sc.nextInt(); Account a1 = bank.register(id, password, repassword, name, personId, email, type); if(a1 != null) { System.out.println(a1); System.out.println("开户成功"); }else { System.out.println("两次输入密码不一致"); } break; case 2: //登录 System.out.println("请输入账户号码："); id = sc.nextLong(); System.out.println("请输入账户密码："); password = sc.next(); Account a2 = bank.login(id, password); if(a2 != null) { System.out.println(a2); System.out.println("登录成功"); }else { System.out.println("账户号码密码错误"); } break; case 3: //存款 System.out.println("请输入账户号码："); id = sc.nextLong(); System.out.println("请输入存款金额："); double money = sc.nextDouble(); Account a3 = bank.deposit(id, money); if(a3 != null) { System.out.println(a3); System.out.println("存款成功"); }else { System.out.println("账户不存在"); } break; case 4: //取款 System.out.println("请输入账户号码："); id = sc.nextLong(); System.out.println("请输入账户密码："); password = sc.next(); System.out.println("请输入取款金额："); money = sc.nextDouble(); Account a4 = bank.withdraw(id, password, money); if(a4 != null ) { System.out.println(a4); System.out.println("取款成功"); }else { System.out.println("账户号码密码错误"); } break; case 5://设置透支额度 System.out.println("请输入账户号码："); id = sc.nextLong(); System.out.println("请输入账户密码："); password = sc.next(); System.out.println("请输入透支金额："); money = sc.nextDouble(); Account a5 = bank.updateCeiling(id, password, money); if(a5 != null ) { System.out.println(a5); System.out.println("设置透支额度成功"); }else { System.out.println("账户号码密码错误或账户类型错误"); } break; case 6:// 转账功能 System.out.println("请输入转账账户号码："); Long from = sc.nextLong(); System.out.println("请输入转账账户密码："); String passwordFrom = sc.next(); System.out.println("请输入收款账户号码："); Long to = sc.nextLong(); System.out.println("请输入转账金额："); money = sc.nextDouble(); boolean flag = bank.transfer(from, passwordFrom, to, money); if(flag) { System.out.println("转账成功"); }else { System.out.println("转账失败"); } break; default: System.out.println("服务选择错误"); } System.out.println("是否继续(y/n)?"); action = sc.next(); }while("y".equals(action)); double balanceSum = bank.balanceSum(); double ceilingSum = bank.ceilingSum(); System.out.println("银行所有账户余额总数:"+balanceSum); System.out.println("所有信用账户透支额度总数"+ceilingSum); } }
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