说明:
1、void setIntHeader(String name, int value):
指定 int 类型的值到 name 标头
2、Refresh :
指明浏览器每隔多久请求更新一次页面。,是一个响应头
在jsp文件中添加下面代码
<%@page import="java.util.GregorianCalendar"%>
<%@page import="java.util.Calendar"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>自动刷新实例_使用setIntHeader()方法和setRefreshHeader()方法来模拟一个数字时钟</title>
</head>
<body>
<%
//设置每隔1秒自动刷新
response.setIntHeader("Refresh", 1);
//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 ="上午";
else
am_pm ="下午";
String CT = hour+":"+minute+":"+second+" "+am_pm;
out.print("当前时间:"+CT + "\n");
%>
</body>
</html>
会看到的效果是时间会每隔1秒就刷新时间
截图