html=text/html htm=text/html shtml=text/html css=text/css xml=text/xml gif=image/gif jpeg=image/jpeg jpg=image/jpeg js=application/x-javascript atom=application/atom+xml rss=application/rss+xml mml=text/mathml txt=text/plain jad=text/vnd.sun.j2me.app-descriptor wml=text/vnd.wap.wml htc=text/x-component png=image/png tif=image/tiff tiff=image/tiff wbmp=image/vnd.wap.wbmp ico=image/x-icon jng=image/x-jng bmp=image/x-ms-bmp svg=image/svg+xml jar=application/java-archive war=application/java-archive ear=application/java-archive hqx=application/mac-binhex40 doc=application/msword pdf=application/pdf ps=application/postscript eps=application/postscript ai=application/postscript rtf=application/rtf xls=application/vnd.ms-excel ppt=application/vnd.ms-powerpoint wmlc=application/vnd.wap.wmlc xhtml=application/vnd.wap.xhtml+xml kml=application/vnd.google-earth.kml+xml kmx=application/vnd.google-earth.kmz cco=application/x-cocoa jardiff=application/x-java-archive-diff jnlp=application/x-java-jnlp-file run=application/x-makeself pl=application/x-perl pm=application/x-perl prc=application/x-pilot pdb=application/x-pilot rar=application/x-rar-compressed rpm=application/x-redhat-package-manager sea=application/x-sea swf=application/x-shockwave-flash sit=application/x-stuffit tcl=application/x-tcl tk=application/x-tcl der=application/x-x509-ca-cert pem=application/x-x509-ca-cert crt=application/x-x509-ca-cert xpi=application/x-xpinstall zip=application/zip mid=audio/midi midi=audio/midi kar=audio/midi mp3=audio/mpeg ra=audio/x-realaudio 3gpp=video/3gpp 3gp=video/3gpp mpeg=video/mpeg mpg=video/mpeg mov=video/quicktime flv=video/x-flv mng=video/x-mng asx=video/x-ms-asf asf=video/x-ms-asf wmv=video/x-ms-wmv avi=video/x-msvideo
这里列文件扩展名和常见MIME类型对应关系，让自己记下
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原文：http://supercharles888.blog.51cto.com/609344/1377977