多平台统一管理软件接口,如何实现多平台统一管理软件接口
279
2022-11-15
java实现简单的ATM项目
本文实例为大家分享了java实现简单的ATM项目的具体代码,供大家参考,具体内容如下
首先要了解的是,这个ATM项目本身是一个轻量级的项目,只为了完成一些ATM具备的一些方法,并非是真正完成一个ATM的全部功能和需求
那么在这个轻量级的ATM项目中,我将完成添加储蓄账号,添加信用账户,提款,取款等基本功能。
适合新手查看,需要掌握java的继承,多态,封装等基本技术能力
那么,首先创建如下的对象类:Account(账户类),Bank(银行类),CreditAccount(信用账户),SavingAccount(储蓄账户类);
大家首先应该搞清楚,这些类文件中之间的关系,每个类之间需要用到什么样的方法;
那么我们先填写Account类
package com.atm.entity;
/**
* 银行账户类
*/
public abstract class Account {
/**
* 账户帐号
*/
private String accountId;
/**
* 账户姓名
*/
private String accountName;
/**
* 账户密码
*/
private String accountPwd;
/**
* 账户余额
*/
private double accountBalance;
/**
* 账户身份证号
*/
private String accountPersonId;
/**
* 账户邮箱
*/
private String accountEmail;
/**
* 账户联系电话
*/
private long accountTelno;
public Account() {
}
public Account(String accountName, String accountPwd, String accountPersonId, long accountTelno,
String accountEmail) {
this.accountName = accountName;
this.accountPwd = accountPwd;
this.accountPersonId = accountPersonId;
this.accountTelno = accountTelno;
this.accountEmail = accountEmail;
}
public String getAccountId() {
return accountId;
}
public void setAccountId(String accountId) {
this.accountId = accountId;
}
public String getAccountName() {
return accountName;
}
public void setAccountName(String accountName) {
this.accountName = accountName;
}
public String getAccountPwd() {
return accountPwd;
}
public void setAccountPwd(String accountPwd) {
this.accountPwd = accountPwd;
}
public double getAccountBalance() {
return accountBalance;
}
public void setAccountBalance(double accountBalance) {
this.accountBalance = accountBalance;
}
public String getAccountPersonId() {
return accountPersonId;
}
public void setAccountPersonId(String accountPersonId) {
this.accountPersonId = accountPersonId;
}
public String getAccountEmail() {
return accountEmail;
}
public void setAccountEmail(String accountEmail) {
this.accountEmail = accountEmail;
}
public long getAccountTelno() {
return accountTelno;
}
public void setAccountTelno(long accountTelno) {
this.accountTelno = accountTelno;
}
/**
* 存款
*
* @param money
* 存款金额
* @return 返回账户余额
*/
public double depoist(double money) {// money 形式参数
if (money > 0)
this.accountBalance += money;
return this.accountBalance;
}
/**
* 取款
*
* @param money
* 取款金额
* @return 返回账户余额
*/
public abstract double withdraw(double money);
/**
* 转账
*
* @param anotherAccount
* 转账的对方账户
* @param money
* 转账金额
* @return 返回当前账户的余额
*/
public double tranferAccount(Account anotherAccount, double money) {// 形参
anotherAccount.accountBalance += money;
this.accountBalance -= money;
return this.accountBalance;
}
}
之后填写信用账户类CreditAccount;我们应该明白,他是继承Account类的,但是,他又需要拥有自身独立的属性,我们可以添加一个最高透支额度的属性
这样来实现代码
/**
* 信用账户
*
*
*/
public class CreditAccount extends Account {
//成员变量
private double maxOverdraw;//最高透支额度
//构造函数
public CreditAccount(String accountName,String accountPwd,String accountPersonId,long accountTelno,String accountEmail,double maxOverdraw){
super( accountName, accountPwd, accountPersonId, accountTelno, accountEmail);
this.maxOverdraw = maxOverdraw;
}
//set,get
public void setMaxOverdraw(double maxOverdraw ){
this.maxOverdraw = maxOverdraw;
}
public double getMaxOverdraw(){
return this.maxOverdraw;
}
@Override
public double withdraw(double money) {
// TODO Auto-generated method stub
return 0;
}
}
同理 填写储蓄账户(SavingAccount)类文件
package com.atm.entity;
/**
* 储蓄账户
*
*
*/
public class SavingAccount extends Account {
public SavingAccount(String accountName,String accountPwd,String accountPersonId,long accountTelno,String accountEmail){
super( accountName, accountPwd, accountPersonId, accountTelno, accountEmail);
}
@Override
public double withdraw(double money) {
// TODO Auto-generated method stub
if(money <= getAccountBalance()){
}
else
System.out.println("账户余额不足");
return getAccountBalance();
}
}
最重要的是填写Bank类的内容,在这个类中,我们要完成注册,产生银行账户,统计所有信用账户的最高透支额度的总和,统计所有账户的总余额, 查询出所有信用账户中透支额度最高的账户, 查询出所有储蓄账户中余额最高的账户等功能
我们这样填写
package com.atm.entity;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* 银行类
*
* @author qianghj
*
* 银行开户 ----> 银行账户 Account account = bank.开户(...)
*
*/
public class Bank {
public Account[] accArray = new Account[2000];
public int count = 0;// 表示银行账户的个数
/**
* 银行账户开户
*
* @param accName
* 用户名称
* @param accPwd
* 用户密码
* @param accPersonId
* 用户身份证
* @param accTelno
* 用户手机号码
* @param accEmail
* 用户邮箱
* @param accountType
* 账户类型 0: 储蓄账户 1 : 信用账户
* @param maxOverdraw
* 信用账户的最高透支额度
* @return 返回有效的银行账户
*/
public Account registAccount(String accName, String accPwd, String accPersonId, long accTelno, String accEmail,
int accountType, double maxOverdraw) {
Account account = null;
if (accountType == 0)
account = new SavingAccount(accName, accPwd, accPersonId, accTelno, accEmail);
else
account = new CreditAccount(accName, accPwd, accPersonId, accTelno, accEmail, maxOverdraw);
account.setAccountId(generateNextAccountId());
accArray[count++] = account;
return account;
}
/**
* 产生银行账户帐号
*
* @return 返回下一个账户的帐号 1,2,3,,4
*/
public String generateNextAccountId() {
return "62223421" + new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date());
}
// 统计所有信用账户的最高透支额度的总和 (1050 ) 2000 , 1050
public double statisticsCreditAccountMaxoverdrawSum() {
double sum = 0;
for (int i = 0; i < count; i++) {
// 判断账户 是不是 CreditAccount类型
if (accArray[i] instanceof CreditAccount) {
CreditAccount creditAcc = (CreditAccount) accArray[i];
sum += creditAcc.getMaxOverdraw();
}
}
return sum;
}
// 统计所有账户的总余额
public double aggregateAamount() {
double sum = 0;
for (int i = 0; i < count; i++) {
if (accArray[i] instanceof SavingAccount) {
SavingAccount savingAccount = (SavingAccount) accArray[i];
sum += savingAccount.getAccountBalance();
}
}
return sum;
}
// 查询出所有信用账户中透支额度最高的账户
public double maxLimit() {
double tem = 0;
for (int i = 0; i < count; i++) {
if (accArray[i] instanceof CreditAccount) {
CreditAccount creditAccount = (CreditAccount) accArray[i];
if (creditAccount.getMaxOverdraw() > tem) {
tem = creditAccount.getMaxOverdraw();
}
}
}
return tem;
}
// 查询出所有储蓄账户中余额最高的账户
public double maxBalance() {
double tem = 0;
for (int i = 0; i < count; i++) {
if (accArray[i] instanceof SavingAccount) {
SavingAccount savingAccount = (SavingAccount) accArray[i];
if (savingAccount.getAccountBalance() > tem) {
tem = savingAccount.getAccountBalance();
}
}
}
return tem;
}
}
最后测试类
package test;
import org.junit.Test;
import com.atm.entity.Account;
import com.atm.entity.Bank;
import com.atm.entity.CreditAccount;
public class TestAccount {
@Test
public void testRegist() {
Bank bank = new Bank();
for (int i = 0; i < 1000; i++) {
// 0: 储蓄账户 1 : 信用账户
Account acc = bank.registAccount("tom" + i, "abc123", "2729382932", 183923302L, "tom" + i + "@163.com",
i % 2, (i % 2 == 0) ? 0 : 3000);
if (i % 2 != 0) {
CreditAccount creditAcc = (CreditAccount) acc;
System.out.println("所有信用账户的名字:" + creditAcc.getAccountName() + "和透支额度:" + creditAcc.getMaxOverdraw());
}
}
// 1000个银行账户开户,500是信用账户,最高透支额度随机数赋值,再测试
// double sum = bank.统计所有信用账户的最高透支额度的总和 ();
double sum = bank.statisticsCreditAccountMaxoverdrawSum();
System.out.println("所有信用账户的最高透支额度的总和 :" + sum);
double sum1 = bank.aggregateAamount();
System.out.println("总余额为" + sum1);
}
}
测试类的内容不多写,大家有兴趣可以自行测试。这样,我们就完成了一个比较简单的ATM项目。希望对新学者有所帮助。
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