151126 

<%@ 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>

　　

posted @ 2015-11-26 22:11  呼哧呼哧  阅读(269)  评论(0)    收藏  举报