作者HarryWen (Harry)
看板java
標題[問題] Java Atm 伺服器端問題
時間Thu Jan 5 02:32:04 2017
請問我要怎麼做server端 在server端處理存錢、提錢 然後在寫入檔案
http://i.imgur.com/ILHCuQV.jpg
http://i.imgur.com/6YxOdhF.jpg
public class ATMMachine {
public static Scanner sc=new Scanner(System.in);
private String name = "Harris";
private double password = 123;
public static void checkBalance() throws IOException { // 餘額查詢
char data[] = new char[128]; // 建立可容納128個字元的陣列
FileReader fr = new FileReader("count.txt"); // 建立物件fr
int num = fr.read(data); // 將資料讀入字元陣列data內
String str = new String(data, 0, num); // 將字元陣列轉換成字串
fr.close();
System.out.println("\tYour current balance is " + str);
}
public static void withdrawMoney() {// 提金錢
if (BalanceInquiry.balance == 0) {
System.out.println("\tYour current balance is zero.");
System.out.println("\tYou cannot withdraw!");
System.out.println("\tYou need to deposit money first.");
} else if (BalanceInquiry.balance <= 500) {
System.out
.println("\tYou do not have sufficient money to withdraw");
System.out
.println("\tChecked your balance to see your money in the bank.");
} else if (Withdraw.withdraw > BalanceInquiry.balance) {
System.out
.println("\tThe amount you withdraw is greater than to your balance");
System.out.println("\tPlease check the amount you entered.");
} else {
BalanceInquiry.balance = BalanceInquiry.balance - Withdraw.withdraw;
System.out.println("\n\tYou withdraw the amount of Php "
+ Withdraw.withdraw);
}
}
public static void depositMoney() throws IOException {// 存錢
FileWriter fw=new FileWriter("count.txt");
String str="7000";
//fw.write(data); // 將字元陣列寫到檔案裡
fw.write(str); // 將字串寫到檔案裡
fw.close();
System.out.println("\tYou deposited the amount of "+ Deposit.getDeposit());
}
public static void main(String[] args){// 主程式
Scanner read = new Scanner(System.in);
int select = 0;
int choice = 0;
System.out
.println("====================================================");
System.out.println("\tWelcome to this simple ATM machine");
System.out
.println("====================================================");
System.out.println();
do {
try {
do {
System.out.println("PLEASE INPUT YOUR ID:");
String s = sc.next();
if (s.equals("Harris")) {
System.out.println("PLEASE INPUT YOUR PASSWORD：");
int ss = sc.nextInt();
if (ss == 123) {
continue;
} else {
System.out.println("ERROR");
System.exit(0);
}
} else {
System.out.println("ERROR");
System.exit(0);
}
System.out.println("\tPlease select ATM Transactions");
System.out.println("========================");
System.out.println("| [1] Deposit |");
System.out.println("| [2] Withdraw |");
System.out.println("| [3] Balance Inquiry |");
System.out.println("| [4] Exit |");
System.out.println("========================");
System.out.print("\n\tWhat would you like to do? ");
select = read.nextInt();
if (select > 4) {// 大於4個選項 輸入錯誤Would you like to try another tra
nsaction?
System.out
.println("\n\tPlease select correct transaction.");
} else {
switch (select) {
case 1:// 存錢
System.out.print("\n\tEnter the amount of money to deposit: ");
Deposit.deposit = read.nextDouble();
String str1 = "1:"+ String.valueOf(Deposit.deposit);
Socket s0 = new Socket("localhost", 8787);
BufferedReader in = new BufferedReader(new InputStreamReader(s0.getInpu
tStream()));
PrintWriter out = new PrintWriter(new OutputStreamWriter(s0.getOutputSt
ream()));
// 送出"Hello"字串
out.println(str1);
out.flush();
char data[]=new char[128]; // 建立可容納128個字元的陣列
FileReader fr=new FileReader("record.txt"); // 建立物件fr
int num=fr.read(data); // 將資料讀入字元陣列data內
String str=new String(data,0,num); // 將字元陣列轉換成字串
fr.close();
String[] aArray = str.split(":");
for (int i=0;i<aArray.length;i++) {
System.out.println(i+" "+aArray[i]);
}
String str8=new String(data,0,num); // 將字元陣列轉換成字串
int deposit=2000;
int total=0;
String str0="";
total=deposit+Integer.parseInt(aArray[2]);
for (int i=0;i<aArray.length-1;i++)
str0=str0+aArray[i]+":";
str0=str0+String.valueOf(total);
System.out.println(str0);
FileWriter fw=new FileWriter("record.txt");
fw.write(str0);
BalanceInquiry.balance = Deposit.deposit+ BalanceInquiry.balance;
depositMoney();
break;
case 2:// 提錢
System.out.print("\n\tTo withdraw, make sure that you have sufficient b
alance in your account.");
System.out.println();
System.out.print("\tEnter amount of money to withdraw: ");
Withdraw.withdraw = read.nextDouble();
String str2 = "2:"+ String.valueOf(Withdraw.withdraw);
Socket s1 = new Socket("localhost", 8787);
BufferedReader in1 = new BufferedReader(new InputStreamReader(s1.getInp
utStream()));
PrintWriter out1 = new PrintWriter(new OutputStreamWriter(s1.getOutputS
tream()));
// 送出"Hello"字串
out1.println(str2);
out1.flush();
String[] aArray1 = str2.split(":");
for (int i=0;i<aArray1.length;i++) {
System.out.println(i+" "+aArray1[i]);
}
withdrawMoney();
break;
case 3:// 查詢餘額
checkBalance();
break;
default:// 離開
System.out.print("\n\tTransaction exited.");
break;
}
}
} while (select > 4);
do {
try {
System.out.println("\n\tWould you like to try another transaction?");
System.out.println("\n\tPress [1] Yes \n\tPress [2] No");
System.out.print("\tEnter choice: ");
choice = read.nextInt();
if (choice > 2) {// 大於二輸入錯誤
System.out
.print("\n\tPlease select correct choice.");
}
}
catch (Exception e) {// 例外
System.out
.println("\tError Input! Please enter a number only.");
read = new Scanner(System.in);
System.out.println("\tEnter yout choice:");
choice = read.nextInt();
}
} while (choice > 2);
} catch (Exception e) {// 例外
System.out
.println("\tError Input! Please enter a number only.");
read = new Scanner(System.in);
System.out.println("\tEnter yout choice:");
select = read.nextInt();
}
} while (choice <= 1);
System.out.println("\n\tThank you for using this simple ATM Machine.");
}
private static void land() {
// TODO Auto-generated method stub
}
}
class Deposit extends ATMMachine {
static double deposit;
public void setDeposit(double d) {
deposit = d;
}
public static double getDeposit() {
return deposit;
}
}
class Withdraw extends ATMMachine {
static double withdraw = 0;
public void setWithdraw(double w) {
withdraw = w;
}
public static double getWithdraw() {
return withdraw;
}
}
class BalanceInquiry extends ATMMachine {
static double balance = 0;
public void setBalance(double b) {
balance = b;
}
public static double getBalance() {
return balance;
}
}
--
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1F：→ swpoker: 作業？ 01/05 19:12
2F：→ p23j8a4b9z: 啊之前不是跟你講要用sql 寫作業也不給詳細一點是怎麼 01/05 22:20
3F：→ p23j8a4b9z: 幫你看 如果你不用sql要寫入檔案或是變數也不講 01/05 22:20
4F：→ p23j8a4b9z: 而且你存成檔案的話 每人應該要有不同檔案 每次登入去 01/05 22:22
5F：→ p23j8a4b9z: 找你的檔案是哪個 在從裡面撈就好 01/05 22:22
6F：→ swpoker: 他應該在想:SQL甚麼的我不懂啦,我是問怎麼寫ATM拉 01/06 10:44
7F：→ ssccg: 也可以用NoSQL啊，重點是需求規格要說清楚吧 01/06 10:47
8F：→ ssccg: 不過作業不清楚怎麼做應該去問老師或助教吧 01/06 10:48
9F：→ Jaymainal: 一定不是妹 是妹的話學長就會教你了 01/09 17:41
10F：推 kigohcy: 用檔案會咬死噢，尤其又用win 01/11 10:30