1、重定向：
// 重定向
//修改响应行状态码，设值响应头Location值
response.setStatus(302);
response.setHeader("Location", "/dy_01/loginSuccess.html");
//推荐方式
response.sendRedirect("/dy_01/loginSuccess.html");
2、修改响应头Refresh// 两秒后自动跳转
response.setHeader("Refresh", "2;url=/dy_01/login.htm");
3、修改HTML mata头利用js动态跳转的方式<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<!--
修改meta头，实现5秒后自动跳转
<meta http-equiv="Refresh" content="5;url=/day/demo_login/index.html">
-->
<title>Insert title here</title>
<script type="text/javascript">
var time = 5;
window.onload = function(){
setInterval('changeTime()',1000);
}
function changeTime(){
time--;
document.getElementById("spanId").innerHTML = time;
//当time为0的时候重定向到另外一个页面
if(time == 0){
location.href="/dy_01/index.html"
}
}
</script>
</head>
<body>
<h1>登录成功</h1>
<h3>将在<span id="spanId"></span>秒后跳转到主界面....</h3>
</body>
</html>
