While the browsers usually have a mind of their own, 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">
The Cache-Control header was added in HTTP 1.1, while the other two were also present in HTTP 1.0.
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