<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<head>
<title>登录页面</title>
<style type="text/css">
body {
font-size: 16px;
}
</style>
<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;
}
if (form1.validationCode.value != form1.validationCode1.value) {
alert("请输入正确的验证码!");
form1.validationCode.focus();
return;
}
}
</script>
</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="16"> <br> 验证码：<input type="text"
name="validationCode"
onKeyDown="if(event.keyCode==13){form1.submit.focus();}" size="6">
<%
int intmethod1 = (int) (Math.random() * 10);
int intmethod2 = (int) (Math.random() * 10);
int intmethod3 = (int) (Math.random() * 10);
int intmethod4 = (int) (Math.random() * 10);
//将得到的随机数进行连接
String intsum = intmethod1 + "" + intmethod2 + intmethod3
+ intmethod4;
%>
<input type="hidden" name="validationCode1" value="<%=intsum%>">
<img src="image/<%=intmethod1%>.jpg"> <img
src="image/<%=intmethod2%>.jpg"> <img
src="image/<%=intmethod3%>.jpg"> <img
src="image/<%=intmethod4%>.jpg"> <br> <input type="submit"
name="submit" value="登录" onfocus="mycheck()"> <input
type="reset" value="重置">
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<head>
<title>处理登录页面的数据</title>
</head>
<body bgcolor="black">
<%
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("xinfeng") && (password.equals("981107"))) {
session.setAttribute("userName", name);
response.sendRedirect("main.jsp");
} else {
response.sendRedirect("login.jsp");
}
} else {
response.sendRedirect("login.jsp");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<head>
<title>系统主页面</title>
</head>
<body bgcolor="pink">
<%
Object name = session.getAttribute("userName");
String name1 = (String) name;
%>
您好<%=name1%>,欢迎您访问！
<br>
<a href="exit.jsp">[退出系统]</a>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<head>
<title>退出系统</title>
</head>
<body>
<%
session.invalidate();
response.sendRedirect("login.jsp");
%>
</body>
</html>