jsp第五次作业 

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>登录页面</title>
<style type="text/css">
	body{font-size: 16px}
</style>
</head>
<body bgcolor="pink">
	<form action="loginCheck.jsp" name="form1" method="post">
		用户名：<input type="text" name="userName" size="16">
		<br>密    码：<input type="password" name="password" size="18">
		<br>
		验证码：<input type="text" name="validationCode"
		onkeyDown="if(event.keyCode==13){form1.submit.focus();}" size=6>
	   <!--  按下回车键的值-->
	   <%
	   	int code1 = (int)(((Math.random())*11)-1);
		int code2 = (int)(((Math.random())*11)-1);
		int code3 = (int)(((Math.random())*11)-1);
		int code4 = (int)(((Math.random())*11)-1);
		//将的到的随机数进行连接
		String intsum = ""+code1+code2+code3+code4;
	   %>
	   <!--设置隐藏域验证比较时使用  -->
	   	<input type="hidden" name="validationCode1" value="<%=intsum%>">
	   	<input type="text"   value="<%=intsum%>" readonly="true" size=2>
	   	<br>
	   	<input type="button" name="submit1" value="登录" onclick="mycheck()">
	   	<input type="reset" value="刷新">
	</form>
</body>
<script type="text/javascript">
	function mycheck() {
		if(form1.userName.value==""){
			alert("用户名不能为空请输入用户名！");
			form1.userName.focus();
			return;
		}
		if(form1.password.value==""){
			alert("密码不能为空请输入密码！");
			form1.password.focus();
			return;
		}
		if(form1.validationCode.value==""){
			alert("验证码不能为空请输入验证码！");
			form1.validationCode.focus();
			return;
		}
		//判断验证码是否正确
		if(form1.validationCode.value!=form1.validationCode1.value){
			alert("请输入正确的验证码！！");
			form1.validationCode.focus();
			return;
		}
		form1.submit();
	}
</script>
</html>

　　

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>处理登录页面数据</title>
</head>
<body bgcolor="pink">
	<%
	//设置请求的编码，永远解决中文乱码问题
	request.setCharacterEncoding("UTF-8");
	String name = request.getParameter("userName");
	String password = request.getParameter("password");
	if(request.getParameter("validationCode1").equals(request.getParameter("validationCode"))){
		if(name.equals("xinxin")&&password.equals("jingjing")){
			session.setAttribute("userName", name);
			response.sendRedirect("main.jsp");

		}else{
			response.sendRedirect("Login.jsp");

		}
	}else{
		response.sendRedirect("Login.jsp");
	}
	%>
</body>
</html>

　　

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>系统主页面</title>
</head>
<body bgcolor="pink">
	<%
	String name = (String)session.getAttribute("userName");
	%>
	您好<%=name %>，欢迎访问<br>
	<a href="exit.jsp">[退出系统]</a>
</body>
</html>

　　

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>退出系统</title>
</head>
<body>
	<%
	session.invalidate();
	response.sendRedirect("Login.jsp");
	%>
</body>
</html>

　　

 

 

 

 

 

 

 

 

 

posted @ 2020-04-12 16:22  快乐的派大星  阅读(154)  评论(0)    收藏  举报