Response.expires=0

Response.addHeader("pragma","no-cache")

Response.addHeader("Cache-Control","no-cache, must-revalidate")

//放在PHP网页开头部分

header("Expires: Thu, 01 Jan 1970 00:00:01 GMT");

header("Cache-Control: no-cache, must-revalidate");

header("Pragma: no-cache");

//放在JSP网页最开头部分

response.addHeader("Cache-Control", "no-cache");

response.addHeader("Expires", "Thu, 01 Jan 1970 00:00:01 GMT");

var url = 'http://url/';

url += '?temp=' + new Date().getTime();

url += '?temp=' + Math.random();

<meta http-equiv="pragma" content="no-cache" />

<meta http-equiv="Cache-Control" content="no-cache, must-revalidate" />

<meta http-equiv="expires" content="Thu, 01 Jan 1970 00:00:01 GMT" />

<meta http-equiv="expires" content="0" />

XMLHttpRequest.setRequestHeader("If-Modified-Since","0");
XMLHttpRequest.send(null);

$.ajaxSetup ({ 
  cache: false //关闭AJAX相应的缓存 
});