jsp自动刷新

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<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><%@ page import="java.io.*,java.util.*" %><html><head><title>自动刷新实例</title></head><body><h2>自动刷新实</h2><%   // 设置每隔5秒刷新一次   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("当前时间为: " + CT + "\n");%></body></html>
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