apache缓存的设置又折腾了一天，总还算是解决了，找到了可以缓存的一段代码，亲测可用,别忘了开启模块哦。

LoadModule deflate_module modules/mod_deflate.so LoadModule expires_module modules/mod_expires.so 就是这两个模块记得开启。

<IfModule mod_expires.c>    
 ExpiresActive   on   
 ExpiresDefault "now plus 1   day"  
 ExpiresByType image/x-icon "access plus 10   year"  
 ExpiresByType image/gif "access plus 1   month"  
 ExpiresByType image/jpeg "access plus 1   month"  
 ExpiresByType text/css "now plus 1   month"  
 ExpiresByType text/javascript "now plus 1   month"  
 ExpiresByType application/x-javascript "now plus 1   month"  
 ExpiresByType text/html "now plus 5   minutes"  
 ExpiresByType text/plain "now plus 1   month"  
 ExpiresByType image/js "access plus 1   month"  
 ExpiresByType application/x-shockwave-flash "access plus 1   week"  
 <FilesMatch   "\.(gif|jpe?g|png)$">   
  Header set   Cache-Control "max-age=604800"  
  Header unset   ETag   
 </FilesMatch>   
</IfModule>   
FileETag   none

  同时还找到了这个好东西,测缓存头的。缓存的好处就不多说了，除非你的服务器非常给力！   http://highloadtools.com/cachecontrol