关于firefox的缓存问题

[code="java"]
response.setHeader("Cache-Control","no-cache"); //HTTP 1.1

   response.setHeader("Pragma","no-cache"); //HTTP 1.0

   response.setDateHeader ("Expires", 0); //prevents caching at the proxy server

[/code]
对于firefox居然毫无作用？

[code="java"]
response.setHeader("Pragma","No-cache");

response.setHeader("Cache-Control","no-cache");
response.setHeader("Cache-Control", "no-store");
response.setDateHeader("Expires",0);
[/code]