注意：如果启动apache提示httpd: Syntax error on line 105 of /apache/conf/httpd.conf: Cannot load modules/mod_deflate.so into server: /apache/modules/mod_deflate.so: undefined symbol: inflate
则说明deflate模块没有找到zlib的库，可以先安装zlib，zlib-devel
yum install zlib zlib-devel
然后手动在httpd.conf下 加入以下命令
LoadFile /usr/lib64/libz.so ##libz.so为deflate压缩模块所需要的库文件
<ifmodule mod_deflate.c>
DeflateCompressionLevel 9
SetOutputFilter DEFLATE
DeflateFilterNote Input instream
DeflateFilterNote Output outstream
DeflateFilterNote Ratio ratio
AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/xhtml+xml application/xml application/rss+xml application/atom_xml application/x-javascript application/x-httpd-php image/svg+xml image/gif image/png image/jpe image/swf image/jpeg image/bmp application/javascript
</ifmodule>
DeflateCompressionLevel 9 ###压缩等级（1-9），等级越大效率越高，但同时消耗的CPU也高，根据具体情况调优，也可以设置为6来平衡CPU及压缩质量
AddOutputFilterByType ##仅压缩限制特定的MIME类型文件
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