以下示例将使用setIntHeader()方法设置Refresh标头以模拟数字时钟-
<%@ page import = "java.io.*,java.util.*" %>
<html>
<head>
<title>Auto Refresh Header Example</title>
</head>
<body>
<center>
<h2>Auto Refresh Header Example</h2>
<%
//将刷新，自动加载时间设置为5秒
response.setIntHeader("Refresh", 5);
//获取当前时间
Calendar calendar = new GregorianCalendar();
String am_pm;
int hour = calendar.get(Calendar.HOUR);
int minute = calendar.get(Calendar.MINUTE);
int second = calendar.get(Calendar.SECOND);
if(calendar.get(Calendar.AM_PM) == 0)
am_pm = "AM";
else
am_pm = "PM";
String CT = hour+":"+ minute +":"+ second +" "+ am_pm;
out.println("Current Time is: " + CT + "\n");
%>
</center>
</body>
</html>现在将上面的代码放在main.jsp中，并尝试访问它。每隔5秒将显示当前系统时间，如下所示。运行JSP。您将收到以下输出：-
Current Time is: 9:44:50 PM