apache提示没有设置 max-age or expires解决办法

LoadModule headers_module modules/mod_headers.so

<IfModule mod_headers.c>
<FilesMatch "＼.(ico|pdf|flv|jpg|jpeg|png|gif|js|CSS|swf)$">
Header set Cache-Control "max-age=604800, public"
</FilesMatch>
<FilesMatch "＼.(xml|txt)$">
Header set Cache-Control "max-age=18000, public, must-revalidate"
</FilesMatch>
<FilesMatch "＼.(html|htm|php|shtml)$">
Header set Cache-Control "max-age=3600, must-revalidate"
</FilesMatch>
</IfModule>