通过配置APACHE，使得被访问页面在客户端进行缓存，从而实现网页访问速度加快，也节省带宽。
按下面方法修改httpd.conf：
LoadModule expires_module modules/mod_expires.so
# set expire rule
ExpiresActive On
ExpiresByType text/html A36000
ExpiresByType application/x-javascript A360000
ExpiresByType image/gif A2592000
ExpiresByType application/x-shockwave-flash A2592000
ExpiresDefault A604800
另一种写法：
ExpiresByType image/gif “access plus 1 month”
ExpiresByType image/jpeg “access plus 1 month”
ExpiresByType image/x-icon “access plus 1 month”
ExpiresByType image/png “access plus 1 month”
ExpiresByType text/html “access plus 30 minutes”
ExpiresByType text/css “access plus 30 minutes”
ExpiresByType text/js “access plus 30 minutes”
ExpiresByType application/x-javascript “access plus 30 minutes”
ExpiresByType application/x-shockwave-flash “access plus 30 minutes”
详细见:http://blog.sina.com.cn/s/blog_5396f1d10100tbfc.html