Posted on 2006-10-19 10:57
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JavaTest
寫一個模擬的銀行存儲系統，能夠實現用戶的登陸，存錢，取錢，轉帳等功能。必須用I/O流在DOS下實現過程。
起了個大早開始寫，郁悶啊都寫到11點了才出來..
雖然SIMPLE，但是也有不少收獲！特別是I/O流。以前學的很不扎實，還得好好看看資料再總結下！
先把代碼帖下，哈哈！
代碼如下：
package com.neusoft.test;
/**//*
*Title 模擬實現銀行存儲系統
*@author realsmy
*2006-10-19 10:50
*/
import java.io.*;
class ZhangHu 
{
private String name;
private String password;
private int money;
ZhangHu(String name, int money) {
this.name = name;
this.money = money;
}
ZhangHu(String name, String password, int money) {
this.name = name;
this.password = password;
this.money = money;
}
public void setM(int a) {
money = money + a;
System.out.println("存儲了" + a + "元，帳戶" + name + "尚有余額" + money + "元");
}
public void getM(int a) {
if (a > money) {
System.out.println("對不起，您的金額不足" + a + "元");
} else {
money = money - a;
System.out
.println("取得了" + a + "元，帳戶" + name + "尚有余額" + money + "元");
}
}
public String getName() {
return name;
}
public String getPassword() {
return password;
}
public int getMoney() {
return money;
}
}
// 銀行模擬系統
public class Bank_Test {
String name;
String password;
String pw;
int money;
int choose;
int a, b;// 存取的金額,臨時變量
File fl;
ZhangHu user, user2;// 帳戶對象
String toname;// 轉入帳戶名
String c;// 臨時存儲轉入帳戶密碼
public Bank_Test() {
login();
user = new ZhangHu(name, password, money);
while (true) {
cunqu();
}
}
// 實現登陸方法login
public void login() {
System.out.println("您好，歡迎光臨趙家銀行！請輸入您的帳戶號碼：");
while (true) {
try {
BufferedReader in = new BufferedReader(new InputStreamReader(
System.in));
name = in.readLine();
} catch (IOException e) {
}
fl = new File(name + ".txt");
// 判斷帳戶是否存在
if (!fl.exists()) {
System.out.println("對不起，您輸入的帳戶并不存在，請重新輸入：");
continue;
}
// 帳戶存在，開始判斷密碼
try {
System.out.println("請輸入您的密碼：");
BufferedReader in2 = new BufferedReader(new InputStreamReader(
System.in));
password = in2.readLine();
} catch (IOException e) {
}
// 取文件中的密碼
try {
BufferedReader reader = new BufferedReader(new FileReader(name
+ ".txt"));
pw = reader.readLine();
money = Integer.parseInt(reader.readLine());
} catch (IOException e) {
}
// 判斷密碼
if (password.equals(pw)) {
System.out.println("登陸成功");
System.out.println("您的用戶尚有余額" + money + "元");
break;
} else {
System.out.println("對不起，您輸入的密碼不正確，請重新輸入帳戶：");
continue;
}
}
}
// 實現存取方法cunqu
public void cunqu() {
System.out.println("請選擇您要進行的操作：");
System.out.println("1. 存錢 2. 取錢 3. 轉帳 4. 退出 ");
try {
BufferedReader in = new BufferedReader(new InputStreamReader(
System.in));
choose = Integer.parseInt(in.readLine());
} catch (IOException e) {
}
// 存錢
if (choose == 1) {
System.out.println("請輸入你要存儲的金額：");
try {
BufferedReader in = new BufferedReader(new InputStreamReader(
System.in));
a = Integer.parseInt(in.readLine());
} catch (IOException e) {
}
user.setM(a);
// infile(user);
}
// 取錢
if (choose == 2) {
System.out.println("請輸入你要取得的金額：");
try {
BufferedReader in = new BufferedReader(new InputStreamReader(
System.in));
a = Integer.parseInt(in.readLine());
} catch (IOException e) {
}
user.getM(a);
infile(user);
}
if (choose == 3) {
System.out.println("請輸入你要轉入的帳戶：");
while (true) {
try {
BufferedReader in = new BufferedReader(
new InputStreamReader(System.in));
toname = in.readLine();
} catch (IOException e) {
}
fl = new File(toname + ".txt");
// 判斷帳戶是否存在
if (!fl.exists()) {
System.out.println("對不起，您輸入的帳戶并不存在，請重新輸入：");
continue;
} else {
break;
}
}
System.out.println("請輸入你要轉入的金額：");
try {
BufferedReader in = new BufferedReader(new InputStreamReader(
System.in));
a = Integer.parseInt(in.readLine());
} catch (IOException e) {
}
user.getM(a);
infile(user);
try {
BufferedReader reader = new BufferedReader(new FileReader(
toname + ".txt"));
c = reader.readLine();
b = Integer.parseInt(reader.readLine());
} catch (IOException e) {
}
user2 = new ZhangHu(toname, c, b);
user2.setM(a);
infile(user2);
}
if (choose == 4) {
System.exit(0);
}
}
// 存入文件
public void infile(ZhangHu p) {
try {
PrintWriter writer = new PrintWriter(new BufferedWriter(
new FileWriter(p.getName() + ".txt")));
writer.println(p.getPassword());
writer.println(p.getMoney());
writer.flush();
} catch (IOException e) {
}
}
public static void main(String[] args) {
new Bank_Test();
}
}
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