<%@ 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>登录</title>
</head>
<body>
<form action ="yanzheng.jsp" method="post">
用户：<input type="text" name="userid" width=30/>
密码：<input type="password" name="password" width=30/>
<input type="submit" value="登录" />
</form>
</body>
</html>
<%@ 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>登录验证页</title>
</head>
<body>
<%
String strUserid =request.getParameter("userid");
String strPW =request.getParameter("password");
if(strUserid == null || strUserid.trim().length() == 0)
{
response.sendRedirect("message.jsp?msgid=1");
}
else if(strPW == null || strPW.trim().length() == 0)
{
response.sendRedirect("message.jsp?msgid=2");
}
else
{//查找用户信息
String strUID ="zhangsan";
String strP ="123";
if(strUserid.equals(strUID))
{
if(strPW.equals(strP))
{
out.print("欢迎登陆");
//跳转到系统页面
}
else
{
response.sendRedirect("message.jsp?msgid=3");
}
}
else
{
response.sendRedirect("message.jsp?msgid=4");
}
}
%>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@page import="java.util.*" %>
<!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>消息页面</title>
</head>
<body>
<%
String strMsgId =request.getParameter("msgid");
if(strMsgId == null || strMsgId.trim().length()==0)
{
out.print("信息错误");
}
else
{
int iMsgid = Integer.parseInt(strMsgId);
switch (iMsgid)
{
case 1:
out.print("账号输入错误");
break;
case 2:
out.print("密码输入错误");
break;
case 3:
out.print("密码错误");
break;
case 4:
out.print("用户不存在");
break;
default:
out.print("无法识别信息");
break;
}
}
response.setHeader("refresh","5;URL=Login.jsp");
%>
</body>
</html>