tomcat 启用gzip压缩
替换tomcat中的connector，启用compression<Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443" compression="on"
noCompressionUserAgents="gozilla,traviata"
compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain,application/json,application/x-javascript,image/gif,image/jpeg,image/png,text/html,text/html,application/xhtml+xml,application/xml"
compressionMinSize="2048"
/>
运行结果：
未启用情况：
33 个请求407.4 KB(396.7 KB 来自缓存) 1.72s (onload: 2.45s)
启用后情况：
33 个请求398.5 KB (396.7 KB 来自缓存)1.81s (onload: 2.72s)
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