How to refresh a JSP page at regular interval?

JSPJava 8Object Oriented ProgrammingProgramming

Following example would use setIntHeader() method to set Refresh header to simulate a digital clock −

<%@ page import = "*,java.util.*" %>

      <title>Auto Refresh Header Example</title>
         <h2>Auto Refresh Header Example</h2>
            // Set refresh, autoload time as 5 seconds
            response.setIntHeader("Refresh", 5);
            // Get current time
            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";
               am_pm = "PM";
            String CT = hour+":"+ minute +":"+ second +" "+ am_pm;
            out.println("Current Time is: " + CT + "\n");

Now put the above code in main.jsp and try to access it. This will display the current system time after every 5 seconds as follows. Run the JSP. You will receive the following output: −

Auto Refresh Header Example

Current Time is: 9:44:50 PM
Published on 20-Mar-2019 12:29:49