[英]JSP Login getParameter return null
我讓簡單的登錄頁面使用jsp
我的問題是getParameter始終為null
這是我的mainpage.jsp代碼
<form action = "LoginProcess.jsp" method = "post">
<table align="center">
<tr>
<td><label for="userid">ID : </label></td>
<td><input type="text" name="userid" id="userid"></td>
</tr>
<tr>
<td><label for="userpw">PW : </label></td>
<td><input type="password" name="userpw" id="userpw"></td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="hidden" name="status">
<input type="button" name="join" class="loingbtn" value="">
<input type="button" name="find" class="loingbtn" value="">
<input type="button" name="booking" class="loingbtn" value="">
<input type="button" name="msg" class="loingbtn" value="">
<input type="submit" name="login" class="loginbtn" value="">
</form>
這是loginprocess.jsp
<body>
<jsp:useBean id = "brd" class = "mainpage.LoginUser" scope="page"/>
<jsp:useBean id = "brddb" class = "mainpage.UserDB" scope="page"/>
<%
String id = request.getParameter("userid");
String passwd = request.getParameter("userpw");
if ((brddb.isLogin(id, passwd))) {
%>
<script>
alert("Success");
</script>
<%
}else{
%>
<script>
alert("Fail");
self.close();
</script>
<%
}
%>
這兩個變量始終為null
String id = request.getParameter("userid");
String passwd = request.getParameter("userpw");
我能做什么
檢查是否在這兩個類中
<jsp:useBean id = "brd" class = "mainpage.LoginUser" scope="page"/>
<jsp:useBean id = "brddb" class = "mainpage.UserDB" scope="page"/>
您將id和psswd設置為null。
那可能是您變得空的唯一原因。
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