Tomcat 9 开启gzip压缩

               			useSendfile="false" compression="on" compressionMinSize="2048"  
compressor="org.apache.catalina.compress.Compressor"
           compressionOptimization="true"
           brotliCompression="on"
           brotliCompressionLevel="4"
               			compressableMimeType="text/css,text/javascript,text/plain,application/javascript,application/json"

 

在 server.xml相应的Connector中加入以上内容即可，不推荐开启图片压缩