📄 login.jsp
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<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录</title>
<!-- javaScript函数 validateLogin()，用来验证是否填写了用户名和密码：--> <script
language="JavaScript"><!--
function validateLogin(){
var strUserName = document. frmLogin. txtUserName.value;
var strPassword = document. frmLogin. txtPassword.value;
if (strUserName ==""){
alert("请您输入用户名！");
return false;
}
if (strPassword ==""){
alert("请输入密码！");
return false;
}
}
-->
</script>
</head>
<body>
<!--提交时调用JavaScript函数 validateLogin()来验证是否填写了用户名和密码：-->
<form method="post" name="frmLogin" action="LoginServlet"
onSubmit="javaScript: return validateLogin();">
<table align="center" bgColor="#cccccc" border="0" cellPadding="0"
cellSpacing="0" width="273">
<%if (request.getAttribute("error") != null) {%>
<tr>
<td colspan=2 align=center><strong><font color="red"><%=request.getAttribute("error")%></font></strong>
</td>
</tr>
<%}
%>
<tr>
<td align="right" height="47" vAlign="bottom" width="94">用户名：</td>
<td height="47" vAlign="bottom" width="172"><input name="txtUserName"></td>
</tr>
<tr>
<td align="right" width="94">密码：</td>
<td width="172"><input name="txtPassword" type="password" value></td>
</tr>
<tr>
<td align="right" height="44" width="94"></td>
<td height="44" width="172"><input name="url" type="hidden" value="<%=request.getParameter("url")%>"><input
name="Submit" type="submit" value="提 交"> <input
name="Reset" type="reset" value="重 置"></td>
</tr>
</table>
</form>
</body>
</html>
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