HTML: <META HTTP-EQUIV="pragma" CONTENT="no-cache"> <META HTTP-EQUIV="Cache-Control" CONTENT="no-store, must-revalidate"> <META HTTP-EQUIV="expires" CONTENT="Wed, 26 Feb 1997 08:21:57 GMT"> <META HTTP-EQUIV="expires" CONTENT="0"> ASP response.expires=0 response.addHeader("pragma","no-cache") response.addHeader("Cache-Control","no-store, must-revalidate") PHP header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); header("Cache-Control: no-store, must-revalidate"); header("Pragma: no-cache"); JSP： response.addHeader("Cache-Control", "no-store, must-revalidate"); response.addHeader("Expires", "Thu, 01 Jan 1970 00:00:01 GMT");