response.setHeader("Cache-Control","no-cache");
response.setHeader("Pragma", "no-cache");
response.setHeader("Expires", "Thu, 01 Dec 1900 16:00:00 GMT");
response.setHeader("Pragma", "no-cache");
response.setHeader("Expires", "Thu, 01 Dec 1900 16:00:00 GMT");
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="0">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="0">