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jsp model1模式 制作简易去哪儿网校招界面(四)

根据韩顺平老师讲解的内容熟悉model1模式。

model1模式是由许多相互独立的jsp文件和java Bean(不是必须的)组成,然后这些jsp从HttpRequest中获得所需数据,进行相应业务逻辑处理,然后将结果通过Response返回前端浏览器。

model1发展过程中分为两类:
1、model1(纯jsp技术,不带任何java Bean)

2、model1(jsp+java Bean)

model1模式的缺点:
1、表现层和业务逻辑层混合在一起---乱!!!
2、在开发过程中,不利于多人协同开发。
3、不利于后期维护。
model1模式的优点:
1、简单,开发速度比较快;
2、比较适合开发小的项目。

我们使用model1模式中的纯jsp技术开发一个简单的用户登录系统(暂时不加数据库)。
主要为了学习:
1、熟悉jsp页面间跳转;(下面两项以后研究)
2、jsp如何去操作数据库;

3、jsp如何显示数据/如何分页


主要涉及到三个页面:

login.jsp

verify.jsp

welcome.jsp


业务逻辑:

login.jsp为登陆页面,用户需要输入用户名和密码,进入verify.jsp进行验证操作:

如果输入的用户名是dahuang,密码是123,则成功跳转到welcome.jsp页面,否则,则返回到login.jsp。


login.jsp页面代码如下:

<%@ page language="java" contentType="text/html; charset=gbk"
	pageEncoding="gbk"%>
<!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=gbk">
<title>qunar recruitment</title>
<style type="text/css">
<!--
body {
	margin-left: 0px;
	margin-top: 0px;
	margin-right: 0px;
	margin-bottom: 0px;
	/*background-image: url(../../CampusApply/images/bg2.jpg);*/
	background-repeat: repeat-x;
}

body,td,th {
	font-size: 12px;
}

/* green button*/
.green {
	color: #e8f0de;
	border: solid 1px #538312;
	background: #64991e;
	background: -webkit-gradient(linear, left top, left bottom, from(#7db72f),
		to(#4e7d0e));
	background: -moz-linear-gradient(top, #7db72f, #4e7d0e);
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#7db72f',
		endColorstr='#4e7d0e');
}

.green:hover {
	background: #538018;
	background: -webkit-gradient(linear, left top, left bottom, from(#6b9d28),
		to(#436b0c));
	background: -moz-linear-gradient(top, #6b9d28, #436b0c);
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#6b9d28',
		endColorstr='#436b0c');
}

.green:active {
	color: #a9c08c;
	background: -webkit-gradient(linear, left top, left bottom, from(#4e7d0e),
		to(#7db72f));
	background: -moz-linear-gradient(top, #4e7d0e, #7db72f);
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#4e7d0e',
		endColorstr='#7db72f');
}
-->
</style>

</head>
<body>
	<style>
.inhalt {
	position: absolute;
	margin: -280px 0px 0px -300px;
	top: 50%;
	left: 50%;
	text-align: left;
	padding: 0px;
	overflow: auto;
}
</style>

	<div style="width: 640px; height: 315px; border: 1px solid #ccc;"
		class="inhalt">
		<div
			style="height: 50px; font-family: 微软雅黑; font-weight: bold; font-size: 32px; text-align: center; margin-top: 10px; margin-bottom: 20px; color: #458B00;">
			<span>2015去哪儿校园招聘职位申请</span>
		</div>
		<div
			style="position: relative; margin: -20px 0px 0px -5px; width: 645px; height: 34px; background: url(images/header_repeat_x.png) left top repeat-x;">
			<h3>
				<div
					style="position: relative; float: left; margin-left: 280px; margin-top: 4px;">
					<font face="微软雅黑" size="2" color="#ffffff">登录界面</font>
				</div>
			</h3>
		</div>
		<form name="form1" action="verify.jsp" method="get">
			<ul>
				<li>用户名:<input id="txtUserName" name="txtUserName" type="text"
					maxlength="20" size="20" />
				</li>
				<br>
				<li> 密 码:<input id="txtPwd" name="txtPwd"
					type="password" maxlength="20" size="20" />
				</li>
			</ul>
			<div
				style="position: relative; float: left; margin-left: 30px; margin-top: 20px;">
				<input class="button green" type="submit" value=http://www.mamicode.com/"登 陆">>
verify.jsp代码如下:

<%@ page language="java" contentType="text/html; charset=gbk"
	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=gbk">
<title>Insert title here</title>
</head>
<body>
	<%
		//接收用户名和密码,完成对用户名和密码的验证
		String username = request.getParameter("txtUserName");
		String password = request.getParameter("txtPwd");
		//简单验证
		if (username.equals("dahuang") && password.equals("123")) {
			//如果用户名和密码合法,则跳转至欢迎界面
			//如何将从login.jsp得到的数据传递给下一个页面:1、cookie,2、session,3、response.sendRedirect
			response.sendRedirect("welcome.jsp?user=" + username);
		} else {
			response.sendRedirect("login.jsp");
		}
	%>

</body>
</html>

welcome.jsp代码如下:

<%@ page language="java" contentType="text/html; charset=gbk"
	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=gbk">
<title>Insert title here</title>
<style type="text/css">
<!--
body {
	margin-left: 0px;
	margin-top: 0px;
	margin-right: 0px;
	margin-bottom: 0px;
	/*background-image: url(../../CampusApply/images/bg2.jpg);*/
	background-repeat: repeat-x;
}

body,td,th {
	font-size: 12px;
}

/* green button*/
.green {
	color: #e8f0de;
	border: solid 1px #538312;
	background: #64991e;
	background: -webkit-gradient(linear, left top, left bottom, from(#7db72f),
		to(#4e7d0e));
	background: -moz-linear-gradient(top, #7db72f, #4e7d0e);
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#7db72f',
		endColorstr='#4e7d0e');
}

.green:hover {
	background: #538018;
	background: -webkit-gradient(linear, left top, left bottom, from(#6b9d28),
		to(#436b0c));
	background: -moz-linear-gradient(top, #6b9d28, #436b0c);
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#6b9d28',
		endColorstr='#436b0c');
}

.green:active {
	color: #a9c08c;
	background: -webkit-gradient(linear, left top, left bottom, from(#4e7d0e),
		to(#7db72f));
	background: -moz-linear-gradient(top, #4e7d0e, #7db72f);
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#4e7d0e',
		endColorstr='#7db72f');
}
-->
</style>
</head>
<body>

	<style>
.inhalt {
	position: absolute;
	margin: -280px 0px 0px -300px;
	top: 50%;
	left: 50%;
	text-align: left;
	padding: 0px;
	overflow: auto;
}
</style>

	<div style="width: 640px; height: 315px; border: 1px solid #ccc;"
		class="inhalt">
		<div
			style="height: 50px; font-family: 微软雅黑; font-weight: bold; font-size: 32px; text-align: center; margin-top: 10px; margin-bottom: 20px; color: #458B00;">
			<span>2015去哪儿校园招聘职位申请</span>
		</div>
		<div
			style="position: relative; margin: -20px 0px 0px -5px; width: 645px; height: 34px; background: url(images/header_repeat_x.png) left top repeat-x;">
			<h3>
				<div
					style="position: relative; float: left; margin-left: 280px; margin-top: 4px;">
					<font face="微软雅黑" size="2" color="#ffffff">欢迎界面</font>
				</div>
			</h3>
		</div>
		<!--  传递一个字符串用 response.sendRedirect即可-->
		<%String str = new String(request.getParameter("user").getBytes("ISO-8859-1"),"gbk"); %> 
		<div
			style="position: relative; float: left; padding-left: 40px; padding-top: 40px; width: 555px; height: 100px;">
			<font face="微软雅黑" size="3" color="#458B00"> <%=str%>:<br>
				        恭喜登陆成功!!! 
		</div>
		<div
			style="position: relative; float: left; margin-left: 30px; margin-top: 20px;">
			<input class="button green" type="button" value=http://www.mamicode.com/"退出">
显示效果:

登陆界面如下:


登陆成功界面如下:


jsp model1模式 制作简易去哪儿网校招界面(四)