<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
</head>
<body>
<script type="text/javascript">
function login() {
if (logindo.admin.value =="") {
alert("账号不能为空");
return;
} else if (logindo.password.value == "") {
alert("密码不能为空");
return;
}
logindo.submit();
}
</script>
<form action="a2.jsp" name="logindo">
用户名:
<input type="text" name="admin" size=6><br>
密码:
<input type="password" name="password" size=6><br>
<input type="button" value="登录" onclick="login()" />
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
</head>
<body>
<%
String admin = request.getParameter("admin");
String password = request.getParameter("password");
if (admin.equals(password)) {
session.setAttribute("admin", admin);
request.getRequestDispatcher("a3.jsp").forward(request,response);
} else {
response.sendRedirect("a5.jsp");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
</head>
<body>
<%
String admin=(String)session.getAttribute("admin");
if(admin==null)
response.sendRedirect("a1.jsp");
%>
欢迎你<%=admin %>
<a href="a4.jsp">退出登录</a>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
</head>
<body>
<%
session.invalidate();
response.setHeader("refresh", "5;url=a1.jsp");
%>
退出成功!
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<h1>用户名与密码不一致登陆失败!!</h1>
<%
session.invalidate();
response.setHeader("refresh", "5;url=a1.jsp");%>
</body>
</html>