现在，我们的小银行系统已经有了简单的功能，现在我们要加入一个小功能，让系统更完善。
当我们想知道最近一次变动账户的时间时应该怎么做呢？
就需要我们引入新的语句
Date date = new Date();这个语句是实例化jdk中写好的方法，让计算机记录当下的时间。
我们来看具体操作：
首先我们要在模型层放入时间这个属性：
当然还有下面的接口这些都是要放一起写的。
这样我们的属性就多了时间。
再下来就是时间的抓取和格式的设置:
这样我们就把拿取时间的铺垫做完了。接下来就是将时间赋值。
做完这些时间就已经成功放入了：
我们要做到账户每次变动就记录时间，那就把上面的代码加入到其他功能的下面，这样就保证时间一直在更新。
我们银行系统就告一段落，其中涉及了数据的输入输出，转账，存取款等。
代码 ：
User：
public class User {
public static Model yonghu = new Model();
public static Model yonghu2 = new Model();
public void UI() {
Dao dao = new Dao();
ChuZhi chuZhi = new ChuZhi();
System.out.println("输入1是输出所有用户信息");
System.out.println("输入2是存钱");
System.out.println("输入3是转账");
System.out.println("输入0是退出程序");
boolean flage = true;
while (flage) {
System.out.println("请输入要执行的功能");
Scanner scanner = new Scanner(System.in);
int anInt = scanner.nextInt();
switch (anInt) {
case 1:
dao.quanshuchu(yonghu, yonghu2);
break;
case 2:
boolean a=true;
Scanner scanner1 = new Scanner(System.in);
while (a){
System.out.println("请输入要存钱的账户卡号，如要退出该功能请输入0");
int anInt1 = scanner1.nextInt();
if (anInt1==yonghu.getId()){
dao.cunkuan1(yonghu);
a=false;
}else if (anInt1==yonghu2.getId()){
dao.cunkuan2(yonghu2);
a=false;
}else if (anInt1==0) {
System.out.println("已退出存钱功能");
a=false;
}else {
System.out.println("查无此人，请检查卡号是否正确");
}
}
break;
case 3:
boolean flag=true;
while (flag) {
System.out.println("请输入要转出的账号,输入0退出该功能：");
Scanner scanner2 = new Scanner(System.in);
int anInt1 = scanner2.nextInt();
if (anInt1==0){
flag=false;
}else if (yonghu.getId()==anInt1){
dao.zhuanzhang(yonghu,yonghu2);
flag=false;
}else if(yonghu2.getId()==anInt1){
dao.zhuanzhang(yonghu2,yonghu);
flag=false;
}else {
System.out.println("账号不存在，请检查");
}
}
break;
case 0:
System.out.println("程序已退出");
System.out.println("欢迎下次使用");
flage = false;
break;
}
}
}
}
Dao
public class Dao {
public void quanshuchu(Model yonghu1, Model yonghu2) {
System.out.println(yonghu1);
System.out.println(yonghu2);
}
public void cunkuan1(Model yonghu1) {
System.out.println("存钱金额：");
Scanner scanner = new Scanner(System.in);
int anInt = scanner.nextInt();
int yue;
yue = yonghu1.getMoney() + anInt;
System.out.println("现在余额为：" + yue);
yonghu1.setMoney(yue);
Date date = new Date();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String format = simpleDateFormat.format(date);
yonghu1.setTime(format);
}
public void cunkuan2(Model yonghu2) {
System.out.println("存钱金额：");
Scanner scanner = new Scanner(System.in);
int anInt = scanner.nextInt();
int yue;
yue = yonghu2.getMoney() + anInt;
System.out.println("现在余额为：" + yue);
yonghu2.setMoney(yue);
Date date = new Date();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String format = simpleDateFormat.format(date);
yonghu2.setTime(format);
}
public void zhuanzhang(Model yonghu, Model yonghu2) {
boolean flag = true;
while (flag) {
System.out.println("请输入转入账号,输入0退出该功能：");
Scanner scanner = new Scanner(System.in);
int anInt = scanner.nextInt();
if (anInt == 0) {
flag=false;
} else if (anInt != yonghu.getId() && anInt != yonghu2.getId()) {
System.out.println("账户不存在请检查：");
} else if (anInt == yonghu2.getId()) {
int a=0;
while (a==0){
System.out.println("请输入转账金额：");
int anInt2 = scanner.nextInt();
if (anInt2<=yonghu.getMoney()) {
int yue1, yue2;
yue1 = yonghu.getMoney() - anInt2;
yue2 = yonghu2.getMoney() + anInt2;
yonghu.setMoney(yue1);
yonghu2.setMoney(yue2);
Date date = new Date();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String format = simpleDateFormat.format(date);
yonghu2.setTime(format);
yonghu.setTime(format);
System.out.println("转出账户余额为"+yonghu.getMoney());
System.out.println("转入账户余额为"+yonghu2.getMoney());
a=1;
flag = false;
}else {
System.out.println("账户"+yonghu.getId()+"的余额为"+yonghu.getMoney()+"，余额不足，转账失败");
}}
} else {
System.out.println("不能给自己转账");
flag = false;
}
}
}
}
Model
public class Model {
//定义要用到的属性
private Integer id;
private Integer money;
private String time;
public Model() {
}
public Model(Integer id, Integer money, String time) {
this.id = id;
this.money = money;
this.time = time;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getMoney() {
return money;
}
public void setMoney(Integer money) {
this.money = money;
}
public String getTime() { return time; }
public void setTime(String time) { this.time = time; }
public String toString() {
return "卡号" + id + ", 钱数：" + money + ", 操作时间：" + time;
}
}
BankRuKou
public class BankRuKou {
public static void main(String[] args) {
ChuZhi duixiang = new ChuZhi();
duixiang.xinxi();
denglu denglu = new denglu();
int a=1;
while (a<4) {
Boolean denglu1 = denglu.denglu();
if (denglu1 == null) {
System.out.println("验证码错误");
System.out.println("还有"+(3-a)+"次机会");
a++;
} else {
if (denglu1) {
System.out.println("登录成功");
System.out.println("欢迎使用本银行系统");
User user = new User();
user.UI();
} else {
System.out.println("账号或密码错误");
System.out.println("还有"+(3-a)+"次机会");
a++;
}
}
}
}
}
denglu
public class denglu {
public Boolean denglu() {
char[] code = {'1', '2', '3', '4', '5', '6', '7', '8', '9', 'z', 'x'};
Random random = new Random();
String res = "";
for (int i = 0; i < 4; i++) {
int i1 = random.nextInt(code.length);
res += code[i1];
}
int zh = 123456;
String pw = "asdf";
System.out.print("请输入管理员账号:");
Scanner scanner = new Scanner(System.in);
int anInt = scanner.nextInt();
System.out.print("请输入管理员密码:");
String next = scanner.next();
System.out.print(res + " 请输入验证码:");
String next1 = scanner.next();
if (anInt == zh && pw.equals(next)) {
if (next1.equals(res)) {
return true;
} else {
return null;
}
} else {
return false;
}
}
}
ChuZhi
public class ChuZhi {
public void xinxi() {
Model yonghu1 = new Model();
Model yonghu2 = new Model();
Scanner scanner = new Scanner(System.in);
Date date = new Date();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
System.out.println("输入用户1的卡号");
int id = scanner.nextInt();
yonghu1.setId(id);
System.out.println("输入用户1的钱数");
int money = scanner.nextInt();
yonghu1.setMoney(money);
String format1 = simpleDateFormat.format(date);
yonghu1.setTime(format1);
System.out.println("输入用户2的卡号");
int id2 = scanner.nextInt();
yonghu2.setId(id2);
System.out.println("输入用户2的钱数");
int money2 = scanner.nextInt();
yonghu2.setMoney(money2);
//时间
String format2 = simpleDateFormat.format(date);
yonghu2.setTime(format2);
User user = new User();
//全局静态变量不用new，可以直接引用,但是数组形式的变量可以new
User.yonghu = yonghu1;
User.yonghu2 = yonghu2;
}
}
原文链接: https://blog.csdn.net/daibadetianshi/article/details/137961985