how to clear browser cache programmatically in jsp?

Question

In my web application there is some problem due to browser cache.

How to clear the browser cache when loading my jsp page?

How can i include clear cache code

Answer 1

The same effect can be achieved by using meta tags in the HTML header:

<meta http-equiv="Pragma" content="no-cache"> 
 <meta http-equiv="Cache-Control"      content="no-cache"> 
<meta http-equiv="Expires" content="Sat, 01 Dec 2012 00:00:00 GMT">

The Cache-Control header was added in HTTP 1.1, while the other two were also present in HTTP 1.0.

Answer 2

You can do this way in your JSP to prevent from caching,not able to clear the cache programatically:

 <% response.setHeader("Cache-Control","no-cache"); //HTTP 1.1 
 response.setHeader("Pragma","no-cache"); //HTTP 1.0 
 response.setDateHeader ("Expires", 0); //prevents caching at the proxy server  
%>

Answer 3

How to disable browser caching for a specific JSP? It is possible to keep the browser from caching a JSP page response. The following hints added to the response header seem to prevent most modern browsers from pulling pages out of cache when the same URL is "hit":

<%
   response.setHeader( "Pragma", "no-cache" );
   response.setHeader( "Cache-Control", "no-cache" );
   response.setDateHeader( "Expires", 0 );
%>

The same effect can be achieved by using meta tags in the HTML header:

<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache">
<meta http-equiv="Expires" content="Sat, 01 Dec 2001 00:00:00 GMT">

Answer 4

<%
response.addHeader("Cache-Control", "no-cache, no-store, must-revalidate");
response.addHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
%>

This worked for me. Reference

Answer 5

 <%
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Cache-Control", "no-store");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
 %>

work perfect in jsp and remember to check session

<%

User u = (User) request.getSession().getAttribute("user");
if (u != null ) {
//show page
}else{
// redirect to login page
}

%>