質問編集履歴
1
追記
test
CHANGED
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File without changes
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test
CHANGED
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@@ -121,3 +121,89 @@
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121
121
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}
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122
122
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123
123
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```
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124
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+
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125
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+
追記：このように記述すると、あまりうまくいかず、if文のあたりがうまくいきません。
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126
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+
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127
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```java
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128
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+
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129
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<%@ page language="java" contentType="text/html; charset=UTF-8"
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130
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131
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pageEncoding="UTF-8"%>
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132
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+
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133
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<%@ page import="java.io.*" %>
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134
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+
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135
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+
<%@ page import="java.sql.*" %>
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136
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+
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137
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+
<%@ page import="javax.servlet.http.*" %>
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138
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+
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139
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<%@ page import="javax.servlet.*" %>
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140
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+
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141
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<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
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142
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+
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143
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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144
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+
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145
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<html>
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146
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+
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147
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<head>
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148
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149
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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150
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+
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151
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<title>ログインページ</title>
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152
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+
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153
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</head>
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154
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+
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155
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<body>
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156
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+
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157
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<H2>ログインに必要な情報</H2>
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158
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+
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159
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<%!
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160
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+
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161
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public void doPost(HttpServletRequest request, HttpServletResponse response)
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162
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+
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163
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throws IOException, ServletException
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164
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+
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165
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{
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166
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167
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HttpSession session = request.getSession(true);
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168
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+
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169
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+
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170
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+
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171
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+
/* 認証失敗から呼び出されたのかどうか */
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172
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+
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173
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Object status = session.getAttribute("status");
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174
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+
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175
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%>
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176
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+
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177
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<c:if test="${status != null}">
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178
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179
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+
認証に失敗しました
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180
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+
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181
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+
再度ユーザー名とパスワードを入力して下さい
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182
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+
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183
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<c:set var="status" value="null"></c:set>
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184
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+
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185
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}
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186
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+
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187
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</c:if>
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188
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+
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189
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<FORM ACTION="../loginDb" method="get">
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190
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+
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191
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<P>ユーザーID</P>
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192
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+
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193
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<INPUT type="text" name="user">
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194
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+
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195
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<P>パスワード</P>
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196
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+
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197
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<INPUT type="password" name="pass" maxlength="8">
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198
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+
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199
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<INPUT type="submit">
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200
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+
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201
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<INPUT type="reset">
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202
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+
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203
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</FORM>
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204
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+
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205
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</body>
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206
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+
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207
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</html>
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208
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+
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209
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+
```
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