apache和tomcat开启GZIP功能

1. apache2.2 和 tomcat6

2. tomcat6的server.xml文件配置:

     < Connector port ="80" maxHttpHeaderSize ="8192" 
           maxThreads ="150" minSpareThreads ="25" maxSpareThreads ="75" 
           enableLookups ="false" redirectPort ="8443" acceptCount ="100" 
           connectionTimeout ="20000" disableUploadTimeout ="true" compression="on"   compressableMimeType="text/html,text/xml,text/css,text/javascript,image/gif,image/jpeg,image/png,image/img,application/x-javascript,text/plain,application/json" URIEncoding ="utf-8" /> 

1) compression="on" 打开压缩功能 
2) compressionMinSize="2048" 启用压缩的输出内容大小，这里面默认为2KB 
3) noCompressionUserAgents="gozilla, traviata" 对于如下的浏览器，不启用压缩 
4) compressableMimeType="text/html,text/xml"　压缩类型 

3. apache2.2的httpd.conf配置:

１）针对Apache2.0以前的版本，它本来是不支持的，不过能够经过添加第三方的module_gzip模块来启用

２）针对Apache2.0及以后的版本，Apache 提供支持, 不过不叫gzip，而叫mod_deflate

  开启三个模块：

在Apache的配置文件中找到下面两行，将注释#去掉，重启。
LoadModule deflate_module modules/mod_deflate.so
LoadModule expires_module modules/mod_expires.so
LoadModule headers_module modules/mod_headers.so

增长：

<IfModule expires_module>
ExpiresActive On
ExpiresDefault "access plus 12 month"
ExpiresByType text/html "access plus 12 months"
ExpiresByType text/css "access plus 12 months"
ExpiresByType image/gif "access plus 12 months"
ExpiresByType image/jpeg "access plus 12 months"
ExpiresByType image/jpg "access plus 12 months"
ExpiresByType image/png "access plus 12 months"
ExpiresByType image/img "access plus 12 months"
EXpiresByType application/x-shockwave-flash "access plus 12 months"
EXpiresByType application/x-javascript      "access plus 12 months"
ExpiresByType video/x-flv "access plus 12 months"
</IfModule>

<IfModule mod_deflate.c>
SetOutputFilter DEFLATE
AddOutputFilterByType DEFLATE text/html text/css image/gif image/jpeg image/png application/x-javascript
</IfModule>
或：

<IfModule deflate_module>
SetOutputFilter DEFLATE
AddOutputFilterByType DEFLATE text/html text/css image/gif image/jpeg image/png application/x-javascript
</IfModule>