I couldn't find a nice and very tiny solution to looking up a mimetype based on file extension in Java, so I built one, it uses /etc/mime.types as the source for the information, after the first run, the library should be pretty fast due to the use of a HashMap for lookups.
Get a Mime by Extension
lookupMapping("doc");
Get a Mime by Path
getMime("/path/to/some/file.tar.gz"); // looks up extension "gz"
Full Code Listing
import java.util.HashMap;
/**
* Looks up a mimetype based upon a file extension.
*/
public class MimeType {
public static final String DEFAULT_MIME = "application/octet-stream";
/**
* A list of extensions and their appropriate mime mappings.
*/
private static final String[][] MIME_MAPPING = {{"323","text/h323"},
{"3gp","video/3gpp"},
{"7z","application/x-7z-compressed"},
{"abw","application/x-abiword"},
{"ai","application/postscript"},
{"aif","audio/x-aiff"},
{"aifc","audio/x-aiff"},
{"aiff","audio/x-aiff"},
{"alc","chemical/x-alchemy"},
{"amr","audio/amr"},
{"amr","audio/amr"},
{"anx","application/annodex"},
{"apk","application/vnd.android.package-archive"},
{"appcache","text/cache-manifest"},
{"~","application/x-trash"},
{"%","application/x-trash"},
{"art","image/x-jg"},
{"asc","text/plain"},
{"asf","video/x-ms-asf"},
{"asn","chemical/x-ncbi-asn1"},
{"asn","chemical/x-ncbi-asn1-spec"},
{"aso","chemical/x-ncbi-asn1-binary"},
{"asx","video/x-ms-asf"},
{"atom","application/atom+xml"},
{"atomcat","application/atomcat+xml"},
{"atomsrv","application/atomserv+xml"},
{"au","audio/basic"},
{"avi","video/x-msvideo"},
{"awb","audio/amr-wb"},
{"awb","audio/amr-wb"},
{"axa","audio/annodex"},
{"axv","video/annodex"},
{"bak","application/x-trash"},
{"bat","application/x-msdos-program"},
{"b","chemical/x-molconn-Z"},
{"bcpio","application/x-bcpio"},
{"bib","text/x-bibtex"},
{"bin","application/octet-stream"},
{"bmp","image/x-ms-bmp"},
{"book","application/x-maker"},
{"boo","text/x-boo"},
{"brf","text/plain"},
{"bsd","chemical/x-crossfire"},
{"c3d","chemical/x-chem3d"},
{"cab","application/x-cab"},
{"cac","chemical/x-cache"},
{"cache","chemical/x-cache"},
{"cap","application/vnd.tcpdump.pcap"},
{"cascii","chemical/x-cactvs-binary"},
{"cat","application/vnd.ms-pki.seccat"},
{"cbin","chemical/x-cactvs-binary"},
{"cbr","application/x-cbr"},
{"cbz","application/x-cbz"},
{"cc","text/x-c++src"},
{"cda","application/x-cdf"},
{"cdf","application/x-cdf"},
{"cdr","image/x-coreldraw"},
{"cdt","image/x-coreldrawtemplate"},
{"cdx","chemical/x-cdx"},
{"cdy","application/vnd.cinderella"},
{"cef","chemical/x-cxf"},
{"cer","chemical/x-cerius"},
{"chm","chemical/x-chemdraw"},
{"chrt","application/x-kchart"},
{"cif","chemical/x-cif"},
{"class","application/java-vm"},
{"cls","text/x-tex"},
{"cmdf","chemical/x-cmdf"},
{"cml","chemical/x-cml"},
{"cod","application/vnd.rim.cod"},
{"com","application/x-msdos-program"},
{"cpa","chemical/x-compass"},
{"cpio","application/x-cpio"},
{"cpp","text/x-c++src"},
{"cpt","application/mac-compactpro"},
{"cpt","image/x-corelphotopaint"},
{"cr2","image/x-canon-cr2"},
{"crl","application/x-pkcs7-crl"},
{"crt","application/x-x509-ca-cert"},
{"crw","image/x-canon-crw"},
{"csd","audio/csound"},
{"csf","chemical/x-cache-csf"},
{"csh","application/x-csh"},
{"csh","text/x-csh"},
{"csm","chemical/x-csml"},
{"csml","chemical/x-csml"},
{"css","text/css"},
{"csv","text/csv"},
{"ctab","chemical/x-cactvs-binary"},
{"c","text/x-csrc"},
{"c++","text/x-c++src"},
{"ctx","chemical/x-ctx"},
{"cu","application/cu-seeme"},
{"cub","chemical/x-gaussian-cube"},
{"cxf","chemical/x-cxf"},
{"cxx","text/x-c++src"},
{"dat","application/x-ns-proxy-autoconfig"},
{"davmount","application/davmount+xml"},
{"dcm","application/dicom"},
{"dcr","application/x-director"},
{"deb","application/x-debian-package"},
{"diff","text/x-diff"},
{"dif","video/dv"},
{"dir","application/x-director"},
{"djv","image/vnd.djvu"},
{"djvu","image/vnd.djvu"},
{"dll","application/x-msdos-program"},
{"dl","video/dl"},
{"dmg","application/x-apple-diskimage"},
{"dms","application/x-dms"},
{"doc","application/msword"},
{"docm","application/vnd.ms-word.document.macroEnabled.12"},
{"docx","application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
{"dot","application/msword"},
{"dotm","application/vnd.ms-word.template.macroEnabled.12"},
{"dotx","application/vnd.openxmlformats-officedocument.wordprocessingml.template"},
{"d","text/x-dsrc"},
{"dvi","application/x-dvi"},
{"dv","video/dv"},
{"dx","chemical/x-jcamp-dx"},
{"dxr","application/x-director"},
{"emb","chemical/x-embl-dl-nucleotide"},
{"embl","chemical/x-embl-dl-nucleotide"},
{"eml","message/rfc822"},
{"ent","chemical/x-ncbi-asn1-ascii"},
{"ent","chemical/x-pdb"},
{"eot","application/vnd.ms-fontobject"},
{"eps2","application/postscript"},
{"eps3","application/postscript"},
{"eps","application/postscript"},
{"epsf","application/postscript"},
{"epsi","application/postscript"},
{"erf","image/x-epson-erf"},
{"es","application/ecmascript"},
{"etx","text/x-setext"},
{"exe","application/x-msdos-program"},
{"ez","application/andrew-inset"},
{"fb","application/x-maker"},
{"fbdoc","application/x-maker"},
{"fch","chemical/x-gaussian-checkpoint"},
{"fchk","chemical/x-gaussian-checkpoint"},
{"fig","application/x-xfig"},
{"flac","audio/flac"},
{"fli","video/fli"},
{"flv","video/x-flv"},
{"fm","application/x-maker"},
{"frame","application/x-maker"},
{"frm","application/x-maker"},
{"gal","chemical/x-gaussian-log"},
{"gam","chemical/x-gamess-input"},
{"gamin","chemical/x-gamess-input"},
{"gan","application/x-ganttproject"},
{"gau","chemical/x-gaussian-input"},
{"gcd","text/x-pcs-gcd"},
{"gcf","application/x-graphing-calculator"},
{"gcg","chemical/x-gcg8-sequence"},
{"gen","chemical/x-genbank"},
{"gf","application/x-tex-gf"},
{"gif","image/gif"},
{"gjc","chemical/x-gaussian-input"},
{"gjf","chemical/x-gaussian-input"},
{"gl","video/gl"},
{"gnumeric","application/x-gnumeric"},
{"gpt","chemical/x-mopac-graph"},
{"gsf","application/x-font"},
{"gsm","audio/x-gsm"},
{"gtar","application/x-gtar"},
{"hdf","application/x-hdf"},
{"hh","text/x-c++hdr"},
{"hin","chemical/x-hin"},
{"hpp","text/x-c++hdr"},
{"hqx","application/mac-binhex40"},
{"hs","text/x-haskell"},
{"hta","application/hta"},
{"htc","text/x-component"},
{"h","text/x-chdr"},
{"h++","text/x-c++hdr"},
{"html","text/html"},
{"htm","text/html"},
{"hwp","application/x-hwp"},
{"hxx","text/x-c++hdr"},
{"ica","application/x-ica"},
{"ice","x-conference/x-cooltalk"},
{"ico","image/vnd.microsoft.icon"},
{"ics","text/calendar"},
{"icz","text/calendar"},
{"ief","image/ief"},
{"iges","model/iges"},
{"igs","model/iges"},
{"iii","application/x-iphone"},
{"info","application/x-info"},
{"inp","chemical/x-gamess-input"},
{"ins","application/x-internet-signup"},
{"iso","application/x-iso9660-image"},
{"isp","application/x-internet-signup"},
{"ist","chemical/x-isostar"},
{"istr","chemical/x-isostar"},
{"jad","text/vnd.sun.j2me.app-descriptor"},
{"jam","application/x-jam"},
{"jar","application/java-archive"},
{"java","text/x-java"},
{"jdx","chemical/x-jcamp-dx"},
{"jmz","application/x-jmol"},
{"jng","image/x-jng"},
{"jnlp","application/x-java-jnlp-file"},
{"jpeg","image/jpeg"},
{"jpe","image/jpeg"},
{"jpg","image/jpeg"},
{"js","application/javascript"},
{"json","application/json"},
{"kar","audio/midi"},
{"key","application/pgp-keys"},
{"kil","application/x-killustrator"},
{"kin","chemical/x-kinemage"},
{"kml","application/vnd.google-earth.kml+xml"},
{"kmz","application/vnd.google-earth.kmz"},
{"kpr","application/x-kpresenter"},
{"kpt","application/x-kpresenter"},
{"ksp","application/x-kspread"},
{"kwd","application/x-kword"},
{"kwt","application/x-kword"},
{"latex","application/x-latex"},
{"lha","application/x-lha"},
{"lhs","text/x-literate-haskell"},
{"lin","application/bbolin"},
{"lsf","video/x-la-asf"},
{"lsx","video/x-la-asf"},
{"ltx","text/x-tex"},
{"ly","text/x-lilypond"},
{"lyx","application/x-lyx"},
{"lzh","application/x-lzh"},
{"lzx","application/x-lzx"},
{"m3g","application/m3g"},
{"m3u8","application/x-mpegURL"},
{"m3u","audio/mpegurl"},
{"m3u","audio/x-mpegurl"},
{"m4a","audio/mpeg"},
{"maker","application/x-maker"},
{"man","application/x-troff-man"},
{"mbox","application/mbox"},
{"mcif","chemical/x-mmcif"},
{"mcm","chemical/x-macmolecule"},
{"md5","application/x-md5"},
{"mdb","application/msaccess"},
{"me","application/x-troff-me"},
{"mesh","model/mesh"},
{"mid","audio/midi"},
{"midi","audio/midi"},
{"mif","application/x-mif"},
{"mkv","video/x-matroska"},
{"mm","application/x-freemind"},
{"mmd","chemical/x-macromodel-input"},
{"mmf","application/vnd.smaf"},
{"mml","text/mathml"},
{"mmod","chemical/x-macromodel-input"},
{"mng","video/x-mng"},
{"moc","text/x-moc"},
{"mol2","chemical/x-mol2"},
{"mol","chemical/x-mdl-molfile"},
{"moo","chemical/x-mopac-out"},
{"mop","chemical/x-mopac-input"},
{"mopcrt","chemical/x-mopac-input"},
{"movie","video/x-sgi-movie"},
{"mov","video/quicktime"},
{"mp2","audio/mpeg"},
{"mp3","audio/mpeg"},
{"mp4","video/mp4"},
{"mpc","chemical/x-mopac-input"},
{"mpega","audio/mpeg"},
{"mpeg","video/mpeg"},
{"mpe","video/mpeg"},
{"mpga","audio/mpeg"},
{"mpg","video/mpeg"},
{"mph","application/x-comsol"},
{"mpv","video/x-matroska"},
{"ms","application/x-troff-ms"},
{"msh","model/mesh"},
{"msi","application/x-msi"},
{"mvb","chemical/x-mopac-vib"},
{"mxf","application/mxf"},
{"mxu","video/vnd.mpegurl"},
{"nb","application/mathematica"},
{"nbp","application/mathematica"},
{"nc","application/x-netcdf"},
{"nef","image/x-nikon-nef"},
{"nwc","application/x-nwc"},
{"o","application/x-object"},
{"oda","application/oda"},
{"odb","application/vnd.oasis.opendocument.database"},
{"odc","application/vnd.oasis.opendocument.chart"},
{"odf","application/vnd.oasis.opendocument.formula"},
{"odg","application/vnd.oasis.opendocument.graphics"},
{"odi","application/vnd.oasis.opendocument.image"},
{"odm","application/vnd.oasis.opendocument.text-master"},
{"odp","application/vnd.oasis.opendocument.presentation"},
{"ods","application/vnd.oasis.opendocument.spreadsheet"},
{"odt","application/vnd.oasis.opendocument.text"},
{"oga","audio/ogg"},
{"ogg","audio/ogg"},
{"ogv","video/ogg"},
{"ogx","application/ogg"},
{"old","application/x-trash"},
{"one","application/onenote"},
{"onepkg","application/onenote"},
{"onetmp","application/onenote"},
{"onetoc2","application/onenote"},
{"orc","audio/csound"},
{"orf","image/x-olympus-orf"},
{"otg","application/vnd.oasis.opendocument.graphics-template"},
{"oth","application/vnd.oasis.opendocument.text-web"},
{"otp","application/vnd.oasis.opendocument.presentation-template"},
{"ots","application/vnd.oasis.opendocument.spreadsheet-template"},
{"ott","application/vnd.oasis.opendocument.text-template"},
{"oza","application/x-oz-application"},
{"p7r","application/x-pkcs7-certreqresp"},
{"pac","application/x-ns-proxy-autoconfig"},
{"pas","text/x-pascal"},
{"patch","text/x-diff"},
{"pat","image/x-coreldrawpattern"},
{"pbm","image/x-portable-bitmap"},
{"pcap","application/vnd.tcpdump.pcap"},
{"pcf","application/x-font"},
{"pcf.Z","application/x-font"},
{"pcx","image/pcx"},
{"pdb","chemical/x-pdb"},
{"pdf","application/pdf"},
{"pfa","application/x-font"},
{"pfb","application/x-font"},
{"pgm","image/x-portable-graymap"},
{"pgn","application/x-chess-pgn"},
{"pgp","application/pgp-encrypted"},
{"pk","application/x-tex-pk"},
{"pls","audio/x-scpls"},
{"pl","text/x-perl"},
{"pm","text/x-perl"},
{"png","image/png"},
{"pnm","image/x-portable-anymap"},
{"potm","application/vnd.ms-powerpoint.template.macroEnabled.12"},
{"pot","text/plain"},
{"potx","application/vnd.openxmlformats-officedocument.presentationml.template"},
{"ppam","application/vnd.ms-powerpoint.addin.macroEnabled.12"},
{"ppm","image/x-portable-pixmap"},
{"pps","application/vnd.ms-powerpoint"},
{"ppsm","application/vnd.ms-powerpoint.slideshow.macroEnabled.12"},
{"ppsx","application/vnd.openxmlformats-officedocument.presentationml.slideshow"},
{"ppt","application/vnd.ms-powerpoint"},
{"pptm","application/vnd.ms-powerpoint.presentation.macroEnabled.12"},
{"pptx","application/vnd.openxmlformats-officedocument.presentationml.presentation"},
{"prf","application/pics-rules"},
{"prt","chemical/x-ncbi-asn1-ascii"},
{"ps","application/postscript"},
{"psd","image/x-photoshop"},
{"p","text/x-pascal"},
{"pyc","application/x-python-code"},
{"pyo","application/x-python-code"},
{"py","text/x-python"},
{"qgs","application/x-qgis"},
{"qtl","application/x-quicktimeplayer"},
{"qt","video/quicktime"},
{"ra","audio/x-pn-realaudio"},
{"ra","audio/x-realaudio"},
{"ram","audio/x-pn-realaudio"},
{"rar","application/rar"},
{"ras","image/x-cmu-raster"},
{"rb","application/x-ruby"},
{"rd","chemical/x-mdl-rdfile"},
{"rdf","application/rdf+xml"},
{"rdp","application/x-rdp"},
{"rgb","image/x-rgb"},
{"rm","audio/x-pn-realaudio"},
{"roff","application/x-troff"},
{"ros","chemical/x-rosdal"},
{"rpm","application/x-redhat-package-manager"},
{"rss","application/x-rss+xml"},
{"rtf","application/rtf"},
{"rtx","text/richtext"},
{"rxn","chemical/x-mdl-rxnfile"},
{"scala","text/x-scala"},
{"sce","application/x-scilab"},
{"sci","application/x-scilab"},
{"sco","audio/csound"},
{"scr","application/x-silverlight"},
{"sct","text/scriptlet"},
{"sd2","audio/x-sd2"},
{"sda","application/vnd.stardivision.draw"},
{"sdc","application/vnd.stardivision.calc"},
{"sd","chemical/x-mdl-sdfile"},
{"sdd","application/vnd.stardivision.impress"},
{"sdf","application/vnd.stardivision.math"},
{"sdf","chemical/x-mdl-sdfile"},
{"sds","application/vnd.stardivision.chart"},
{"sdw","application/vnd.stardivision.writer"},
{"ser","application/java-serialized-object"},
{"sfv","text/x-sfv"},
{"sgf","application/x-go-sgf"},
{"sgl","application/vnd.stardivision.writer-global"},
{"sha1","application/x-sha1"},
{"sh","application/x-sh"},
{"shar","application/x-shar"},
{"shp","application/x-qgis"},
{"sh","text/x-sh"},
{"shtml","text/html"},
{"shx","application/x-qgis"},
{"sid","audio/prs.sid"},
{"sig","application/pgp-signature"},
{"sik","application/x-trash"},
{"silo","model/mesh"},
{"sis","application/vnd.symbian.install"},
{"sisx","x-epoc/x-sisx-app"},
{"sit","application/x-stuffit"},
{"sitx","application/x-stuffit"},
{"skd","application/x-koan"},
{"skm","application/x-koan"},
{"skp","application/x-koan"},
{"skt","application/x-koan"},
{"sldm","application/vnd.ms-powerpoint.slide.macroEnabled.12"},
{"sldx","application/vnd.openxmlformats-officedocument.presentationml.slide"},
{"smi","application/smil"},
{"smil","application/smil"},
{"snd","audio/basic"},
{"spc","chemical/x-galactic-spc"},
{"spl","application/futuresplash"},
{"spl","application/x-futuresplash"},
{"spx","audio/ogg"},
{"sql","application/x-sql"},
{"src","application/x-wais-source"},
{"srt","text/plain"},
{"stc","application/vnd.sun.xml.calc.template"},
{"std","application/vnd.sun.xml.draw.template"},
{"sti","application/vnd.sun.xml.impress.template"},
{"stl","application/sla"},
{"stw","application/vnd.sun.xml.writer.template"},
{"sty","text/x-tex"},
{"sv4cpio","application/x-sv4cpio"},
{"sv4crc","application/x-sv4crc"},
{"svg","image/svg+xml"},
{"svgz","image/svg+xml"},
{"sw","chemical/x-swissprot"},
{"swf","application/x-shockwave-flash"},
{"swfl","application/x-shockwave-flash"},
{"sxc","application/vnd.sun.xml.calc"},
{"sxd","application/vnd.sun.xml.draw"},
{"sxg","application/vnd.sun.xml.writer.global"},
{"sxi","application/vnd.sun.xml.impress"},
{"sxm","application/vnd.sun.xml.math"},
{"sxw","application/vnd.sun.xml.writer"},
{"t","application/x-troff"},
{"tar","application/x-tar"},
{"taz","application/x-gtar-compressed"},
{"tcl","application/x-tcl"},
{"tcl","text/x-tcl"},
{"texi","application/x-texinfo"},
{"texinfo","application/x-texinfo"},
{"tex","text/x-tex"},
{"text","text/plain"},
{"tgf","chemical/x-mdl-tgf"},
{"tgz","application/x-gtar-compressed"},
{"thmx","application/vnd.ms-officetheme"},
{"tiff","image/tiff"},
{"tif","image/tiff"},
{"tk","text/x-tcl"},
{"tm","text/texmacs"},
{"torrent","application/x-bittorrent"},
{"tr","application/x-troff"},
{"tsp","application/dsptype"},
{"ts","video/MP2T"},
{"tsv","text/tab-separated-values"},
{"txt","text/plain"},
{"udeb","application/x-debian-package"},
{"uls","text/iuls"},
{"ustar","application/x-ustar"},
{"val","chemical/x-ncbi-asn1-binary"},
{"vcd","application/x-cdlink"},
{"vcf","text/x-vcard"},
{"vcs","text/x-vcalendar"},
{"vmd","chemical/x-vmd"},
{"vms","chemical/x-vamas-iso14976"},
{"vrml","model/vrml"},
{"vrml","x-world/x-vrml"},
{"vrm","x-world/x-vrml"},
{"vsd","application/vnd.visio"},
{"wad","application/x-doom"},
{"wav","audio/x-wav"},
{"wax","audio/x-ms-wax"},
{"wbmp","image/vnd.wap.wbmp"},
{"wbxml","application/vnd.wap.wbxml"},
{"webm","video/webm"},
{"wk","application/x-123"},
{"wma","audio/x-ms-wma"},
{"wmd","application/x-ms-wmd"},
{"wmlc","application/vnd.wap.wmlc"},
{"wmlsc","application/vnd.wap.wmlscriptc"},
{"wmls","text/vnd.wap.wmlscript"},
{"wml","text/vnd.wap.wml"},
{"wm","video/x-ms-wm"},
{"wmv","video/x-ms-wmv"},
{"wmx","video/x-ms-wmx"},
{"wmz","application/x-ms-wmz"},
{"woff","application/x-font-woff"},
{"wp5","application/vnd.wordperfect5.1"},
{"wpd","application/vnd.wordperfect"},
{"wrl","model/vrml"},
{"wrl","x-world/x-vrml"},
{"wsc","text/scriptlet"},
{"wvx","video/x-ms-wvx"},
{"wz","application/x-wingz"},
{"x3db","model/x3d+binary"},
{"x3d","model/x3d+xml"},
{"x3dv","model/x3d+vrml"},
{"xbm","image/x-xbitmap"},
{"xcf","application/x-xcf"},
{"xcos","application/x-scilab-xcos"},
{"xht","application/xhtml+xml"},
{"xhtml","application/xhtml+xml"},
{"xlam","application/vnd.ms-excel.addin.macroEnabled.12"},
{"xlb","application/vnd.ms-excel"},
{"xls","application/vnd.ms-excel"},
{"xlsb","application/vnd.ms-excel.sheet.binary.macroEnabled.12"},
{"xlsm","application/vnd.ms-excel.sheet.macroEnabled.12"},
{"xlsx","application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
{"xlsx","application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
{"xlt","application/vnd.ms-excel"},
{"xltm","application/vnd.ms-excel.template.macroEnabled.12"},
{"xltx","application/vnd.openxmlformats-officedocument.spreadsheetml.template"},
{"xltx","application/vnd.openxmlformats-officedocument.spreadsheetml.template"},
{"xml","application/xml"},
{"xpi","application/x-xpinstall"},
{"xpm","image/x-xpixmap"},
{"xsd","application/xml"},
{"xsl","application/xml"},
{"xspf","application/xspf+xml"},
{"xtel","chemical/x-xtel"},
{"xul","application/vnd.mozilla.xul+xml"},
{"xwd","image/x-xwindowdump"},
{"xyz","chemical/x-xyz"},
{"zip","application/zip"},
{"zmt","chemical/x-mopac-input"}};
private final HashMap<String, String> m_mapping;
private static MimeType instance;
private MimeType()
{
m_mapping = new HashMap<String, String>();
for(int i = 0; i < MIME_MAPPING.length; i++)
{
m_mapping.put(MIME_MAPPING[i][0], MIME_MAPPING[i][1]);
}
}
private static MimeType getInstance()
{
if(instance == null)
instance = new MimeType();
return instance;
}
/**
* Returns a mime given the extension, or the default if none is found.
* @param ext - the extension to lookup the mime based upon.
* @return
*/
private String lookupMapping(String ext)
{
String mime = m_mapping.get(ext);
if(mime == null)
return DEFAULT_MIME;
return mime;
}
/**
* Looks up a mimetype.
*
* @param path - the path to look at the mime for.
* @return - the mime of the path.
*/
public static String getMime(String path)
{
String ext = path.substring(path.lastIndexOf('.') + 1);
return getInstance().lookupMapping(ext);
}
}
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