1、首先要导入mod_deflate
LoadModule deflate_module modules/mod_deflate.so
2、在http.conf里加入如下：
<IfModule deflate_module>
AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/x-javascript
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4.[0678] no-gzip
BrowserMatch MSIEs7 !no-gzip !gzip-only-text/html
BrowserMatch Opera !no-gzip
Header append Vary User-Agent
</IfModule>