asked on

automatic refresh of a jsp page

hi all,
I have a problem regarding refreshing a jsp page. The first time I call the jsp file, the data from the database is displayed correctly. But when I update the DB, and call the jsp page, the data displayed in the browser is not updated. I still have to press "ctrl-r" to update the display. How would I update the display in the browser without using "ctrl-r"?

thanks.

ASKER CERTIFIED SOLUTION

pellep

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cheekycj

Actually, the best thing that works in IE and Netscape is to have the following:
<%
response.addHeader("Pragma" , "No-cache") ;
response.addHeader("Cache-Control, "no-cache") ;
response.addDateHeader("Expires", 0);
%>

BOTH in the head of the of page and bottom of the page (I read this in a message board and it seems
to work for me)

<html>
<head>
<%
// this prevents caching in NS and IE
response.addHeader("Pragma" , "No-cache") ;
response.addHeader("Cache-Control, "no-cache") ;
response.addDateHeader("Expires", 0);
%>

<META HTTP-EQUIV=Refresh CONTENT="5; URL=currentJSP.jsp"/>
</head>
<body>

....

</body>
<%
// this helps prevent caching in IE
response.addHeader("Pragma" , "No-cache") ;
response.addHeader("Cache-Control, "no-cache") ;
response.addDateHeader("Expires", 0);
%>
</html>

Also what you can do is add a random number at the end of the URL when you do the meta refresh.

HTH,
CJ

raid999

you can also set a timer in the JSP page and then use response.redirect(URL);

eaglesview

ASKER

thanks.. it solved my problem.