質問編集履歴
4
誤植
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エラーコード画像の追加
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</center>
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2
htmlのソースコードを追加
title
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File without changes
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body
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@@ -253,4 +253,33 @@
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}
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}
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```
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```html
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<!DOCTYPE html>
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260
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<html>
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261
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<head>
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262
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<meta charset="UTF-8">
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263
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<title>口座操作画面</title>
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264
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</head>
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265
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<body>
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267
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<center>
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268
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<div id="top-main">
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<h1>いらっしゃいませ</h1>
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270
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<h2>操作をお選び下さい</h2>
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271
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</div>
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272
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<!-- 選択 -->
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273
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<nav class="menu">
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<ul>
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275
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<li class="menu_item"><a href="open">口座開設</a></li>
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276
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<li class="menu_item"><a href="close">口座解約</a></li>
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277
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<li class="menu_item"><a href="deposit">お預入れ</a></li>
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278
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+
<li class="menu_item"><a href="withdraw">お引出し</a></li>
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279
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<li class="menu_item"><a href="balance">残高照会</a></li>
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</ul>
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281
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</nav>
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</center>
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</body>
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284
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</html>
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1
今回使用しているソースコードを追加しました。
title
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File without changes
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body
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@@ -3,4 +3,254 @@
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3
3
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4
4
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サーブレットのソースファイルをコンパイルした際には、エラーは発生しておらずクラスファイルの作成もできています。
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5
5
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6
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-
コードなどが必要でしたら、ご指摘下さい。
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6
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+
コードなどが必要でしたら、ご指摘下さい。
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7
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+
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8
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+
```java
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|
9
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+
public class Account{
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|
10
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+
private String name; //口座名
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|
11
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+
private int balance; //口座の残高
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12
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+
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13
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+
public Account(String myName){ //口座名
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14
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+
name = myName;
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15
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+
balance = 0;
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16
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+
}
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17
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+
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18
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+
public int deposit(int amount){ //預金額
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19
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+
if(amount <= 0)
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20
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+
return -3;
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21
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+
else
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22
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+
balance += amount;
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23
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+
return 0;
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24
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+
}
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25
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+
|
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26
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+
public int withdraw(int amount){ //出金額
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27
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+
if(amount <= 0)
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28
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+
return -3;
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29
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+
else if(amount > balance)
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30
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+
return -1;
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31
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+
else
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32
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+
balance -= amount;
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33
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+
return 0;
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34
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+
}
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35
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+
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36
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+
public int showBalance(){ //残高照会
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37
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+
return balance;
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38
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+
}
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39
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+
}
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40
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+
|
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41
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+
```
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|
42
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+
```java
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43
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+
import java.io.IOException;
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44
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+
import java.io.PrintWriter;
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45
|
+
import javax.servlet.ServletException;
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|
46
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+
import javax.servlet.http.HttpServlet;
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47
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+
import javax.servlet.http.HttpServletRequest;
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48
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+
import javax.servlet.http.HttpServletResponse;
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49
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+
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50
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+
public class BankServlet extends HttpServlet {
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51
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+
private ExtendedBank bank; /* 口座の管理をするオブジェクト */
|
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52
|
+
public BankServlet() { /* bankを初期化する */
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53
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+
bank = new ExtendedBank();
|
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54
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+
}
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55
|
+
|
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56
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+
public void doGet(HttpServletRequest request, HttpServletResponse response)
|
|
57
|
+
throws IOException, ServletException {
|
|
58
|
+
String b_name = request.getParameter("name");
|
|
59
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+
int result = bank.open(b_name);
|
|
60
|
+
response.setContentType("text/html; charset=UTF-8");
|
|
61
|
+
PrintWriter pw = response.getWriter();
|
|
62
|
+
/* 口座開設処理 */
|
|
63
|
+
if(result == 0) { /* 口座開設成功のHTML生成*/
|
|
64
|
+
|
|
65
|
+
pw.println(
|
|
66
|
+
"<!DOCTYPE html>"
|
|
67
|
+
+"<html>"
|
|
68
|
+
+"<head>"
|
|
69
|
+
+"<meta charset=\"UTF-8\">"
|
|
70
|
+
+"</head>"
|
|
71
|
+
+"<body>"
|
|
72
|
+
+"<div class=\"main\">"
|
|
73
|
+
+"<h1>口座開設成功</h1>"
|
|
74
|
+
+"<h2>+ b_name +様の口座を開設致しました!</h2>"
|
|
75
|
+
+"</div>"
|
|
76
|
+
+"<a class=\"success\" href=\"index.html\">メインメニューに戻る</a>"
|
|
77
|
+
+"</body>"
|
|
78
|
+
+"</html>");
|
|
79
|
+
|
|
80
|
+
} else { /*口座開設失敗のHTML生成 */
|
|
81
|
+
|
|
82
|
+
pw.println(
|
|
83
|
+
"<!DOCTYPE html>"
|
|
84
|
+
+"<html>"
|
|
85
|
+
+"<head>"
|
|
86
|
+
+"<meta charset=\"UTF-8\">"
|
|
87
|
+
+"</head>"
|
|
88
|
+
+"<body>"
|
|
89
|
+
+"<div class=\"main\">"
|
|
90
|
+
+"<h1>口座開設失敗</h1>"
|
|
91
|
+
+"<h2>+ b_name +様の口座は既に存在しております。</h2>"
|
|
92
|
+
+"</div>"
|
|
93
|
+
+"<a class=\"success\" href=\"index.html\">メインメニューに戻る</a>"
|
|
94
|
+
+"</body>"
|
|
95
|
+
+"</html>");
|
|
96
|
+
}
|
|
97
|
+
}
|
|
98
|
+
}
|
|
99
|
+
```
|
|
100
|
+
```java
|
|
101
|
+
import java.util.Hashtable;
|
|
102
|
+
|
|
103
|
+
public class ExtendedBank{
|
|
104
|
+
private Hashtable<String,Account>customer; // 口座リスト
|
|
105
|
+
private int balance; // 残高格納用
|
|
106
|
+
|
|
107
|
+
public ExtendedBank(){ // 口座リスト初期化
|
|
108
|
+
customer = new Hashtable<String,Account>();
|
|
109
|
+
}
|
|
110
|
+
|
|
111
|
+
public int open(String name){ // 口座開設
|
|
112
|
+
Account myaccount = customer.get(name);
|
|
113
|
+
|
|
114
|
+
if(customer.get(name) != null) return -7;
|
|
115
|
+
else{
|
|
116
|
+
customer.put(name,new Account(name));
|
|
117
|
+
return 0;
|
|
118
|
+
}
|
|
119
|
+
}
|
|
120
|
+
|
|
121
|
+
public int close(String name){ // 口座解約
|
|
122
|
+
Account myaccount = customer.get(name);
|
|
123
|
+
|
|
124
|
+
if(customer.get(name) != null){
|
|
125
|
+
if(myaccount.showBalance() == 0){
|
|
126
|
+
customer.remove(name);
|
|
127
|
+
return 0;
|
|
128
|
+
}else return -1;
|
|
129
|
+
}else return -7;
|
|
130
|
+
}
|
|
131
|
+
|
|
132
|
+
|
|
133
|
+
public int withdraw(String name,int amount){ // 引き出し
|
|
134
|
+
Account myaccount = customer.get(name);
|
|
135
|
+
|
|
136
|
+
if(customer.get(name) != null){
|
|
137
|
+
if(amount <= 0)
|
|
138
|
+
return -3;
|
|
139
|
+
else if(amount > balance)
|
|
140
|
+
return -1;
|
|
141
|
+
else{
|
|
142
|
+
balance -= amount;
|
|
143
|
+
return 0;
|
|
144
|
+
}
|
|
145
|
+
}else return -7;
|
|
146
|
+
}
|
|
147
|
+
|
|
148
|
+
|
|
149
|
+
public int deposit(String name,int amount){ // 預金
|
|
150
|
+
Account myaccount = customer.get(name);
|
|
151
|
+
if(customer.get(name) == null)
|
|
152
|
+
return -7;
|
|
153
|
+
else if(amount <= 0)
|
|
154
|
+
return -3;
|
|
155
|
+
else{
|
|
156
|
+
balance += amount;
|
|
157
|
+
return 0;
|
|
158
|
+
}
|
|
159
|
+
}
|
|
160
|
+
|
|
161
|
+
|
|
162
|
+
public int showBalance(String name){ // 残高照会
|
|
163
|
+
Account myaccount = customer.get(name);
|
|
164
|
+
if(customer.get(name) != null) return myaccount.showBalance();
|
|
165
|
+
else return -7;
|
|
166
|
+
}
|
|
167
|
+
|
|
168
|
+
// ExtendedBank要素
|
|
169
|
+
// 預金
|
|
170
|
+
public int deposit(String name,String amount){ // name:口座名 d_amount:預金額
|
|
171
|
+
int result;
|
|
172
|
+
|
|
173
|
+
try{
|
|
174
|
+
result = Integer.parseInt(amount);
|
|
175
|
+
}catch(NumberFormatException e){
|
|
176
|
+
if(this.showBalance(name) == -7)
|
|
177
|
+
return -7;
|
|
178
|
+
else
|
|
179
|
+
return -4;
|
|
180
|
+
}
|
|
181
|
+
|
|
182
|
+
result = Integer.parseInt(amount);
|
|
183
|
+
if(result <= 0)
|
|
184
|
+
return -3;
|
|
185
|
+
else{
|
|
186
|
+
balance += result;
|
|
187
|
+
return 0;
|
|
188
|
+
}
|
|
189
|
+
}
|
|
190
|
+
|
|
191
|
+
// 引き出し
|
|
192
|
+
public int withdraw(String name,String amount){ // name:口座名 w_amount:引出額
|
|
193
|
+
int result;
|
|
194
|
+
|
|
195
|
+
try{
|
|
196
|
+
result = Integer.parseInt(amount);
|
|
197
|
+
}catch(NumberFormatException e){
|
|
198
|
+
if(this.showBalance(name) == -7)
|
|
199
|
+
return -7;
|
|
200
|
+
else
|
|
201
|
+
return -4;
|
|
202
|
+
}
|
|
203
|
+
|
|
204
|
+
result = Integer.parseInt(amount);
|
|
205
|
+
if(result <= 0)
|
|
206
|
+
return -3;
|
|
207
|
+
else if(result > balance)
|
|
208
|
+
return -1;
|
|
209
|
+
else{
|
|
210
|
+
balance -= result;
|
|
211
|
+
return 0;
|
|
212
|
+
}
|
|
213
|
+
}
|
|
214
|
+
}
|
|
215
|
+
|
|
216
|
+
```
|
|
217
|
+
```java
|
|
218
|
+
import java.io.IOException;
|
|
219
|
+
import java.io.PrintWriter;
|
|
220
|
+
import javax.servlet.ServletException;
|
|
221
|
+
import javax.servlet.http.HttpServlet;
|
|
222
|
+
import javax.servlet.http.HttpServletRequest;
|
|
223
|
+
import javax.servlet.http.HttpServletResponse;
|
|
224
|
+
|
|
225
|
+
public class OpenServlet extends HttpServlet{
|
|
226
|
+
public void doGet(HttpServletRequest request, HttpServletResponse response)
|
|
227
|
+
throws IOException, ServletException {
|
|
228
|
+
|
|
229
|
+
response.setContentType("text/html; charset=UTF-8");
|
|
230
|
+
PrintWriter pw = response.getWriter();
|
|
231
|
+
|
|
232
|
+
pw.println(
|
|
233
|
+
"<!DOCTYPE html>"
|
|
234
|
+
+"<html>"
|
|
235
|
+
+"<head>"
|
|
236
|
+
+"<meta charset=\"utf-8\">"
|
|
237
|
+
+"</head>"
|
|
238
|
+
+"<body>"
|
|
239
|
+
+"<div class=\"main\">"
|
|
240
|
+
+"<h1>口座開設</h1>"
|
|
241
|
+
+"<form action=\"bank\" method=\"GET\">"
|
|
242
|
+
+"<input type=\"hidden\" name=\"command\" value=\"open\">"
|
|
243
|
+
+"<div class=\"input\">"
|
|
244
|
+
+"<label for=\"account\">口座名</label>"
|
|
245
|
+
+"<input type=\"text\" name=\"name\" placeholder=\"入力された口座名\">"
|
|
246
|
+
+"<input type=\"submit\" value = \"確認\">"
|
|
247
|
+
+"</div>"
|
|
248
|
+
+"</form>"
|
|
249
|
+
+"<a class=\"cancel\" href=\"index.html\">キャンセル</a>"
|
|
250
|
+
+"</div>"
|
|
251
|
+
+"</body>"
|
|
252
|
+
+"</html>");
|
|
253
|
+
}
|
|
254
|
+
}
|
|
255
|
+
|
|
256
|
+
```
|