| 内容 | 代码如下:
 html网页
 <meta http-equiv=pragma content=no-cache>
 <meta http-equiv=cache-control content=no-cache, must-revalidate>
 <meta http-equiv=expires content=wed, 26 feb 1997 08:21:57 gmt>
 或者<meta http-equiv=expires content=0>
 asp网页
 response.expires = -1
 response.expiresabsolute = now() - 1
 response.cachecontrol = no-cache
 php网页
 header(expires: mon, 26 jul 1997 05:00:00 gmt);
 header(cache-control: no-cache, must-revalidate);
 header(pragma: no-cache);
 jsp网页
 response.setheader(pragma, no-cache);
 response.setheader(cache-control, no-cache);
 response.setdateheader(expires, 1);
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