登陆页
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="zuoye11.jsp" method="get" >
账号 <input name="zhanghao" type="text" size="16" value="请输出账号"/><br><br>
密码 <input name="mima" type="password" size="16" /><br>
        
<input name="tijiao" type="submit" value="提交"/>
    
<input name="qvxiao" type="button" value="取消"/>
</form>
</body>
</html>
错误页 设置账号为123，密码为123。
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
String s1 = new String(request.getParameter("mima"));
String s2 = new String(request.getParameter("zhanghao"));
if(s1 != "123" || s2 != "123")
{
out.print("您输入的账号和密码有错误");
}
response.setHeader("refresh","30;URL=zuoye1.jsp");
%>
</body>
</html>