Clear page Caching (HTML asp php java)

The code is as follows

HTML Web page <meta http-equiv= "Pragma" content= "No-cache" > <meta http-equiv= "Cache-control" content= "No-cache, must-revalidate" > <meta http-equiv= "Expires" content= "Wed Feb, 1997 08:21:57 GMT" > or <meta http-equiv= "expires" content= "0" > ASP Web page Response.Expires =-1 Response.ExpiresAbsolute = Now ()-1 Response.CacheControl = "No-cache" PHP Web page Header ("Expires:mon, June June 1997 05:00:00 GMT"); Header ("Cache-control:no-cache, must-revalidate"); Header ("Pragma:no-cache"); JSP Web page Response.setheader ("Pragma", "No-cache"); Response.setheader ("Cache-control", "No-cache"); Response.setdateheader ("Expires", 1);