写一个模拟的银行存储系统，能够实现用户的登陆，存钱，取钱，转帐等功能。必须用I/O流在DOS下实现过程。
起了个大早开始写，郁闷啊都写到11点了才出来..
虽然SIMPLE，但是也有不少收获！特别是I/O流。以前学的很不扎实，还得好好看看资料再总结下！
先把代码帖下，哈哈！
代码如下：
package
com.neusoft.test;
/**/
/*
*Title 模拟实现银行存储系统 *@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("存储了" + a + "元，帐户" + name + "尚有余额" + money + "元"); } public void getM(int a) { if (a > money) { System.out.println("对不起，您的金额不足" + a + "元"); } else { money = money - a; System.out .println("取得了" + a + "元，帐户" + name + "尚有余额" + money + "元"); } } public String getName() { return name; } public String getPassword() { return password; } public int getMoney() { return money; }}
//
银行模拟系统
public
class
Bank_Test
{ String name; String password; String pw; int money; int choose; int a, b;// 存取的金额,临时变量 File fl; ZhangHu user, user2;// 帐户对象 String toname;// 转入帐户名 String c;// 临时存储转入帐户密码 public Bank_Test() { login(); user = new ZhangHu(name, password, money); while (true) { cunqu(); } } // 实现登陆方法login public void login() { System.out.println("您好，欢迎光临赵家银行！请输入您的帐户号码："); while (true) { try { BufferedReader in = new BufferedReader(new InputStreamReader( System.in)); name = in.readLine(); } catch (IOException e) { } fl = new File(name + ".txt"); // 判断帐户是否存在 if (!fl.exists()) { System.out.println("对不起，您输入的帐户并不存在，请重新输入："); continue; } // 帐户存在，开始判断密码 try { System.out.println("请输入您的密码："); BufferedReader in2 = new BufferedReader(new InputStreamReader( System.in)); password = in2.readLine(); } catch (IOException e) { } // 取文件中的密码 try { BufferedReader reader = new BufferedReader(new FileReader(name + ".txt")); pw = reader.readLine(); money = Integer.parseInt(reader.readLine()); } catch (IOException e) { } // 判断密码 if (password.equals(pw)) { System.out.println("登陆成功"); System.out.println("您的用户尚有余额" + money + "元"); break; } else { System.out.println("对不起，您输入的密码不正确，请重新输入帐户："); continue; } } } // 实现存取方法cunqu public void cunqu() { System.out.println("请选择您要进行的操作："); System.out.println("1. 存钱 2. 取钱 3. 转帐 4. 退出 "); try { BufferedReader in = new BufferedReader(new InputStreamReader( System.in)); choose = Integer.parseInt(in.readLine()); } catch (IOException e) { } // 存钱 if (choose == 1) { System.out.println("请输入你要存储的金额："); try { BufferedReader in = new BufferedReader(new InputStreamReader( System.in)); a = Integer.parseInt(in.readLine()); } catch (IOException e) { } user.setM(a); // infile(user); } // 取钱 if (choose == 2) { System.out.println("请输入你要取得的金额："); 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("请输入你要转入的帐户："); while (true) { try { BufferedReader in = new BufferedReader( new InputStreamReader(System.in)); toname = in.readLine(); } catch (IOException e) { } fl = new File(toname + ".txt"); // 判断帐户是否存在 if (!fl.exists()) { System.out.println("对不起，您输入的帐户并不存在，请重新输入："); continue; } else { break; } } System.out.println("请输入你要转入的金额："); 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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