有时候，我们会需要去判断文件类型（比如业务中控制上传文件的类型），可能大家一般只是简单的去判断一下扩展名，比如是否图片就判断文件扩展名是否为 jpg\jpeg\png\gif 等格式中的一种，但是很遗憾，扩展名可以很容易的人为修改，所以这种判断是不可靠的。
那么，为了更加准确的去判断文件类型，我们可以通过读取文件的 二进制头信息，然后判断是否是指定类型的文件来实现。
下面整理了一些文件类型对应的二进制头信息，方便后面查阅。
[
{"扩展名":123,"文件头标识（HEX）":"00001A00051004","文件描述":"Lotus1-2-3spreadsheet(v9)file"},
{"扩展名":"3gg;3gp;3g2","文件头标识（HEX）":"000000nn66747970336770","文件描述":"3rdGenerationPartnershipProject3GPP(nn=0x14)and3GPP2(nn=0x20)multimediafiles"},
{"扩展名":"7z","文件头标识（HEX）":"377ABCAF271C","文件描述":"7-ZIPcompressedfile"},
{"扩展名":"aba","文件头标识（HEX）":"00014241","文件描述":"PalmAddressBookArchivefile"},
{"扩展名":"abi","文件头标识（HEX）":"414F4C494E444558","文件描述":"AOLaddressbookindexfile"},
{"扩展名":"aby;idx","文件头标识（HEX）":"414F4C4442","文件描述":"AOLdatabasefiles:addressbook(ABY)anduserconfigurationdata(MAIN.IDX)"},
{"扩展名":"accdb","文件头标识（HEX）":"000100005374616E6461726420414345204442","文件描述":"MicrosoftAccess2007file"},
{"扩展名":"ACM","文件头标识（HEX）":"4D5A","文件描述":"MSaudiocompressionmanagerdriver"},
{"扩展名":"ADF","文件头标识（HEX）":"444F53","文件描述":"Amigadiskfile"},
{"扩展名":"adx","文件头标识（HEX）":"0300000041505052","文件描述":"LotusApproachADXfile"},
{"扩展名":"AIFF","文件头标识（HEX）":"464F524D00","文件描述":"AudioInterchangeFile"},
{"扩展名":"ain","文件头标识（HEX）":"2112","文件描述":"AINCompressedArchiveFile"},
{"扩展名":"ami","文件头标识（HEX）":"5B7665725D","文件描述":"LotusAmiPro"},
{"扩展名":"amr","文件头标识（HEX）":"2321414D52","文件描述":"AdaptiveMulti-RateACELP(AlgebraicCodeExcitedLinearPrediction)Codec,commonlyaudioformatwithGSMcellphones"},
{"扩展名":"ANI","文件头标识（HEX）":"52494646","文件描述":""},
{"扩展名":"API","文件头标识（HEX）":"4D5A900003000000","文件描述":"Acrobatplug-in"},
{"扩展名":"arc","文件头标识（HEX）":"1A0x","文件描述":"LHarchivefile,oldversion(wherex=0x2,0x3,0x4,0x8or0x9fortypes1-5,respectively)"},
{"扩展名":"arc","文件头标识（HEX）":"41724301","文件描述":"FreeArccompressedfile"},
{"扩展名":"arj","文件头标识（HEX）":"60EA","文件描述":"ARJCompressedArchive"},
{"扩展名":"ARJ","文件头标识（HEX）":"60EA27","文件描述":""},
{"扩展名":"ART","文件头标识（HEX）":"4A47030E000000","文件描述":"AOLARTfile"},
{"扩展名":"ART","文件头标识（HEX）":"4A47040E000000","文件描述":"AOLARTfile"},
{"扩展名":"asf","文件头标识（HEX）":"3026B2758E66CF11","文件描述":"WindowsMedia"},
{"扩展名":"asf;wma;wmv","文件头标识（HEX）":"3026B2758E66CF11A6D900AA0062CE6C","文件描述":"MicrosoftWindowsMediaAudio/VideoFile(AdvancedStreamingFormat)"},
{"扩展名":"asx","文件头标识（HEX）":"3C","文件描述":"AdvancedStreamredirectorfile"},
{"扩展名":"au","文件头标识（HEX）":"2E736E64","文件描述":"SoundMachineAudioFile"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"NeXT/SunMicrosystemsμ-Lawaudiofile"},
{"扩展名":"avi","文件头标识（HEX）":"41564920","文件描述":"AudioVideoInterleave(AVI)"},
{"扩展名":"AX","文件头标识（HEX）":"4D5A","文件描述":"Librarycachefile"},
{"扩展名":"AX","文件头标识（HEX）":"4D5A900003000000","文件描述":"DirectShowfilter"},
{"扩展名":"bag","文件头标识（HEX）":"414F4C2046656564626167","文件描述":"AOLandAIMbuddylistfile"},
{"扩展名":"BAS","文件头标识（HEX）":"202020","文件描述":""},
{"扩展名":"bin","文件头标识（HEX）":"424C4932323351","文件描述":"ThomsonSpeedtouchseriesWLANrouterfirmware"},
{"扩展名":"bmp","文件头标识（HEX）":"424D","文件描述":"WindowsBitmap"},
{"扩展名":"BMP","文件头标识（HEX）":"424D3E","文件描述":""},
{"扩展名":"bz;bz2","文件头标识（HEX）":"425A68","文件描述":"BZIPArchive"},
{"扩展名":"BZ2;TAR.BZ2;TBZ2;TB2","文件头标识（HEX）":"425A68","文件描述":"bzip2compressedarchive"},
{"扩展名":"CAB","文件头标识（HEX）":"495363","文件描述":""},
{"扩展名":"CAB;HDR","文件头标识（HEX）":"49536328","文件描述":"InstallShieldv5.xor6.xcompressedfile"},
{"扩展名":"CAB","文件头标识（HEX）":"4D534346","文件描述":"MicrosoftCABFileFormat"},
{"扩展名":"cat","文件头标识（HEX）":30,"文件描述":"Microsoftsecuritycatalogfile"},
{"扩展名":"CBD","文件头标识（HEX）":"434246494C45","文件描述":"WordPerfectdictionaryfile(unconfirmed)"},
{"扩展名":"CCD","文件头标识（HEX）":"5B436C","文件描述":""},
{"扩展名":"cdr","文件头标识（HEX）":"CDR","文件描述":"CorelDraw"},
{"扩展名":"CDR","文件头标识（HEX）":"454C49544520436F6D6D616E64657220","文件描述":"ElitePlusCommandersavedgamefile"},
{"扩展名":"CDR,DVF","文件头标识（HEX）":"4D535F564F494345","文件描述":"SonyCompressedVoiceFile"},
{"扩展名":"CHI;CHM","文件头标识（HEX）":"49545346","文件描述":"MicrosoftCompiledHTMLHelpFile"},
{"扩展名":"CHM","文件头标识（HEX）":"495453","文件描述":""},
{"扩展名":"CLB","文件头标识（HEX）":"434D5831","文件描述":"CorelBinarymetafile"},
{"扩展名":"CLB","文件头标识（HEX）":"434F4D2B","文件描述":"COM+Catalogfile"},
{"扩展名":"cnt","文件头标识（HEX）":"3A42617365","文件描述":""},
{"扩展名":"COM,DLL,DRV,EXE,PIF,QTS,QTX,SYS","文件头标识（HEX）":"4D5A","文件描述":"Windows/DOSexecutablefile"},
{"扩展名":"COM","文件头标识（HEX）":"4D5AEE","文件描述":""},
{"扩展名":"COM","文件头标识（HEX）":"E93B03","文件描述":""},
{"扩展名":"CPE","文件头标识（HEX）":"464158434F5645522D564552","文件描述":"MicrosoftFaxCoverSheet"},
{"扩展名":"CPL","文件头标识（HEX）":"4D5A","文件描述":"Controlpanelapplication"},
{"扩展名":"CPT","文件头标识（HEX）":"4350543746494C45","文件描述":"CorelPhotopaintfile"},
{"扩展名":"CPT","文件头标识（HEX）":"43505446494C45","文件描述":"CorelPhotopaintfile"},
{"扩展名":"CPX","文件头标识（HEX）":"5B5769","文件描述":""},
{"扩展名":"cru;crush","文件头标识（HEX）":"4352555348","文件描述":"CRUSHArchiveFile"},
{"扩展名":"CRU","文件头标识（HEX）":"43525553482076","文件描述":"Crushcompressedarchive"},
{"扩展名":"CRW","文件头标识（HEX）":"49491A00000048454150434344520200","文件描述":"CanondigitalcameraRAWfile"},
{"扩展名":"CTF","文件头标识（HEX）":"436174616C6F6720332E303000","文件描述":"WhereIsItCatalogfile"},
{"扩展名":"CUR","文件头标识（HEX）":"0000020001002020","文件描述":"Windowscursorfile"},
{"扩展名":"dat","文件头标识（HEX）":3,"文件描述":"MapInfoNativeDataFormat"},
{"扩展名":"dat","文件头标识（HEX）":"1A52545320434F4D5052455353454420494D4147452056312E301A","文件描述":"RuntimeSoftwarediskimage"},
{"扩展名":"dat","文件头标识（HEX）":"415647365F496E746567726974795F4461746162617365","文件描述":"AVG6Integritydatabasefile"},
{"扩展名":"DAT","文件头标识（HEX）":"43524547","文件描述":"Windows9xregistryhive"},
{"扩展名":"DAT","文件头标识（HEX）":"436C69656E742055726C4361636865204D4D462056657220","文件描述":"IEHistoryDATfile"},
{"扩展名":"DAT","文件头标识（HEX）":"45524653534156454441544146494C45","文件描述":"KrollEasyRecoverySavedRecoveryStatefile"},
{"扩展名":"DAT","文件头标识（HEX）":"496E6E6F20536574757020556E696E7374616C6C204C6F6720286229","文件描述":"InnoSetupUninstallLogfile"},
{"扩展名":"db","文件头标识（HEX）":"0006156100000002000004D200001000","文件描述":"NetscapeNavigator(v4)databasefile"},
{"扩展名":"DB","文件头标识（HEX）":"44424648","文件描述":"PalmZirephotodatabase"},
{"扩展名":"db","文件头标识（HEX）":8,"文件描述":"dBASEIVordBFastconfigurationfile"},
{"扩展名":"db3","文件头标识（HEX）":3,"文件描述":"dBASEIIIfile"},
{"扩展名":"db4","文件头标识（HEX）":4,"文件描述":"dBASEIVdatafile"},
{"扩展名":"dba","文件头标识（HEX）":"00014244","文件描述":"PalmDateBookArchivefile"},
{"扩展名":"dbx","文件头标识（HEX）":"CFAD12FE","文件描述":""},
{"扩展名":"dbx","文件头标识（HEX）":"CFAD12FEC5FD746F","文件描述":"OutlookExpress"},
{"扩展名":"dci","文件头标识（HEX）":"3C21646F63747970","文件描述":"AOLHTMLmailfile"},
{"扩展名":"dcx","文件头标识（HEX）":"3ADE68B1","文件描述":"DCXGraphicFile"},
{"扩展名":"DDB","文件头标识（HEX）":"000100","文件描述":""},
{"扩展名":"dib","文件头标识（HEX）":"424D","文件描述":"device-independentbitmapimage"},
{"扩展名":"DLL","文件头标识（HEX）":"4D5A90","文件描述":""},
{"扩展名":"DMP","文件头标识（HEX）":"4D444D5093A7","文件描述":"Windowsminidumpfile"},
{"扩展名":"DMS","文件头标识（HEX）":"444D5321","文件描述":"AmigaDiskMashercompressedarchive"},
{"扩展名":"doc","文件头标识（HEX）":"0D444F43","文件描述":"DeskMateDocumentfile"},
{"扩展名":"doc","文件头标识（HEX）":"1234567890FF","文件描述":"MSWord6.0"},
{"扩展名":"doc","文件头标识（HEX）":"31BE000000AB0000","文件描述":"MSWordforDOS6.0"},
{"扩展名":"doc","文件头标识（HEX）":"7FFE340A","文件描述":"MSWord"},
{"扩展名":"dot;ppt;xla;ppa;pps;pot;msi;sdw;db","文件头标识（HEX）":"D0CF11E0","文件描述":"MSOffice/OLE2"},
{"扩展名":"doc;dot;xls;xlt;xla;ppt;apr;ppa;pps;pot;msi;sdw;db","文件头标识（HEX）":"D0CF11E0A1B11AE1","文件描述":"MSCompoundDocumentv1orLotusApproachAPRfile"},
{"扩展名":"DPL","文件头标识（HEX）":"4D5A50","文件描述":""},
{"扩展名":"DRV","文件头标识（HEX）":"4D5A16","文件描述":""},
{"扩展名":"drw","文件头标识（HEX）":7,"文件描述":"Acommonsignatureandfileextensionformanydrawingprograms."},
{"扩展名":"drw","文件头标识（HEX）":"01FF02040302","文件描述":"Micrografxvectorgraphicfile"},
{"扩展名":"ds4","文件头标识（HEX）":"4D47582069747064","文件描述":"MicrografixDesigner4"},
{"扩展名":"DSN","文件头标识（HEX）":"4D56","文件描述":"CDStomperProlabelfile"},
{"扩展名":"dsp","文件头标识（HEX）":"23204D6963726F736F667420446576656C6F7065722053747564696F","文件描述":"MicrosoftDeveloperStudioprojectfile"},
{"扩展名":"dss","文件头标识（HEX）":"02647373","文件描述":"DigitalSpeechStandard(Olympus,Grundig,&Phillips)"},
{"扩展名":"dtd","文件头标识（HEX）":"0764743264647464","文件描述":"DesignTools2DDesignfile"},
{"扩展名":"dtd","文件头标识（HEX）":"3C21454E54495459","文件描述":"XMLDTD"},
{"扩展名":"DVR","文件头标识（HEX）":"445644","文件描述":"DVR-Studiostreamfile"},
{"扩展名":"dwg","文件头标识（HEX）":"414331","文件描述":""},
{"扩展名":"","文件头标识（HEX）":"41433130","文件描述":"GenericAutoCADdrawing"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"NOTESonAutoCADfileheaders:The0x41-43-31-30(AC10)isagenericheader,occupyingthefirstfourbytesinthefile.Thenexttwobytesgivefurtherindicationabouttheversionorsubtype:"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x30-32(02)—AutoCADR2.5"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x30-33(03)—AutoCADR2.6"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x30-34(04)—AutoCADR9"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x30-36(06)—AutoCADR10"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x30-39(09)—AutoCADR11/R12"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x31-30(10)—AutoCADR13(subtype10)"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x31-31(11)—AutoCADR13(subtype11)"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x31-32(12)—AutoCADR13(subtype12)"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x31-33(13)—AutoCADR14(subtype13)"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x31-34(14)—AutoCADR14(subtype14)"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x31-35(15)—AutoCADR2000"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x31-38(18)—AutoCADR2004"},
{"扩展名":"","文件头标识（HEX）":"","文件描述":"0x32-31(21)—AutoCADR2007"},
{"扩展名":"Enn(wherennarenumbers)","文件头标识（HEX）":"455646","文件描述":"EnCaseevidencefile"},
{"扩展名":"ECO","文件头标识（HEX）":"2A5052","文件描述":""},
{"扩展名":"elf","文件头标识（HEX）":"7F454C4601010100","文件描述":"ELFExecutable"},
{"扩展名":"emf","文件头标识（HEX）":"0100000058000000","文件描述":"Extended(Enhanced)WindowsMetafileFormat,printerspoolfile"},
{"扩展名":"eml","文件头标识（HEX）":"44656C69766572792D646174653A","文件描述":"Email"},
{"扩展名":"EML","文件头标识（HEX）":"46726F6D202020","文件描述":"Acommmonfileextensionfore-mailfiles.SignaturesshownhereareforNetscape,Eudora,andagenericsignature,respectively.EMLisalsousedbyOutlookExpressandQuickMail."},
{"扩展名":"EML","文件头标识（HEX）":"46726F6D203F3F3F","文件描述":"Acommmonfileextensionfore-mailfiles.SignaturesshownhereareforNetscape,Eudora,andagenericsignature,respectively.EMLisalsousedbyOutlookExpressandQuickMail."},
{"扩展名":"EML","文件头标识（HEX）":"46726F6D3A20","文件描述":"Acommmonfileextensionfore-mailfiles.SignaturesshownhereareforNetscape,Eudora,andagenericsignature,respectively.EMLisalsousedbyOutlookExpressandQuickMail."},
{"扩展名":"EML","文件头标识（HEX）":"526563","文件描述":""},
{"扩展名":"enc","文件头标识（HEX）":"005C41B1FF","文件描述":"MujahideenSecrets2encryptedfile"},
{
"扩展名": "enl",
"文件头标识（HEX）": "[32byteoffset] 40 40 40 20 00 00 40 40 40 40",
"文件描述": "EndNote Library File"
},
{"扩展名":"eps","文件头标识（HEX）":"25215053","文件描述":"AdobeEPSFile"},
{"扩展名":"eps","文件头标识（HEX）":"252150532D41646F6265","文件描述":"Postscript"},
{"扩展名":"eps","文件头标识（HEX）":"252150532D41646F62652D332E3020455053462D332030","文件描述":"AdobeencapsulatedPostScriptfile(Ifthissignatureisnotattheimmediatebeginningofthefile,itwilloccurearlyinthefile,commonlyatbyteoffset30)"},
{"扩展名":"EPS","文件头标识（HEX）":"C5D0D3","文件描述":""},
{"扩展名":"eth","文件头标识（HEX）":"1A350100","文件描述":"GNNettestWinPharoahcapturefile"},
{"扩展名":"evt","文件头标识（HEX）":"300000004C664C65","文件描述":"WindowsEventViewerfile"},
{"扩展名":"evt","文件头标识（HEX）":"03000000C466C456","文件描述":""},
{"扩展名":"EVTX","文件头标识（HEX）":"456C6646696C6500","文件描述":"WindowsVistaeventlogfile"},
{"扩展名":"exe;dll;drv;vxd;sys;ocx;vbx","文件头标识（HEX）":"4D5A","文件描述":"Win32Executable"},
{"扩展名":"exe;dll;drv;vxd;sys;ocx;vbx","文件头标识（HEX）":"4D5A","文件描述":"Win16Executable"},
{"扩展名":"exe;com;386;ax;acm;sys;dll;drv;flt;fon;ocx;scr;lrc;vxd;cpl;x32","文件头标识（HEX）":"4D5A","文件描述":"ExecutableFile"},
{"扩展名":"EXE,DLL,OCX,OLB,IMM,IME","文件头标识（HEX）":"4D5A90","文件描述":""},
{"扩展名":"fli","文件头标识（HEX）":"0011AF","文件描述":"FLICAnimationfile"},
{"扩展名":"flt","文件头标识（HEX）":"000101","文件描述":"OpenFlight3Dfile"},
{"扩展名":"FLT","文件头标识（HEX）":"4D5A900003000000","文件描述":"Auditiongraphicfilterfile(Adobe)"},
{"扩展名":"FLV","文件头标识（HEX）":"464C5601","文件描述":"Flashvideofile"},
{"扩展名":"fm","文件头标识（HEX）":"3C4D616B657246696C6520","文件描述":"AdobeFrameMakerfile"},
{"扩展名":"fm3","文件头标识（HEX）":"00001A0007800100","文件描述":"Lotus123v3FMTfile"},
{"扩展名":"fmt","文件头标识（HEX）":"20006800200","文件描述":"Lotus123v4FMTfile"},
{"扩展名":"FNT","文件头标识（HEX）":"434841","文件描述":""},
{"扩展名":"FON","文件头标识（HEX）":"4D5A","文件描述":"Fontfile"},
{"扩展名":"GBC","文件头标识（HEX）":"87F53E","文件描述":""},
{"扩展名":"gid","文件头标识（HEX）":"3F5F0300","文件描述":"WindowsHelpIndexFile"},
{"扩展名":"GID","文件头标识（HEX）":"4C4E0200","文件描述":"WindowsHelpindexfile"},
{"扩展名":"GIF","文件头标识（HEX）":"47494638","文件描述":""},
{"扩展名":"gif","文件头标识（HEX）":"474946383761","文件描述":"Graphicsinterchangeformatfile(GIF87A)"},
{"扩展名":"gif","文件头标识（HEX）":"474946383961","文件描述":"Graphicsinterchangeformatfile(GIF89A)"},
{"扩展名":"GTD","文件头标识（HEX）":"7B5072","文件描述":""},
{"扩展名":"GX2","文件头标识（HEX）":"475832","文件描述":"ShowPartnergraphicsfile(notconfirmed)"},
{"扩展名":"gz;tar;tgz","文件头标识（HEX）":"1F8B","文件描述":"GzipArchiveFile"},
{"扩展名":"gz;tgz","文件头标识（HEX）":"1F8B08","文件描述":"GZCompressedFile"},
{"扩展名":"hap","文件头标识（HEX）":"91334846","文件描述":"HAPArchiveFile"},
{"扩展名":"HDMP","文件头标识（HEX）":"4D444D5093A7","文件描述":"Windowsheapdumpfile"},
{"扩展名":"hdr","文件头标识（HEX）":"233F52414449414E43450A","文件描述":"adianceHighDynamicRangeimagefile"},
{"扩展名":"HLP","文件头标识（HEX）":"3F5F03","文件描述":""},
{"扩展名":"hlp","文件头标识（HEX）":"3F5F0300","文件描述":"WindowsHelpfile"},
{"扩展名":"HLP","文件头标识（HEX）":"4C4E0200","文件描述":"WindowsHelpfile"},
{
"扩展名": "hlp",
"文件头标识（HEX）": "[7byteoffset] 00 00 FF FF FF FF",
"文件描述": "Windows Help file"
},
{"扩展名":"hqx","文件头标识（HEX）":"28546869732066696C65","文件描述":"MacintoshBinHex4CompressedArchive"},
{"扩展名":"hqx","文件头标识（HEX）":"28546869732066696C65206D75737420626520636F6E76657274656420776974682042696E48657820","文件描述":"MacintoshBinHex4CompressedArchive"},
{"扩展名":"HTM","文件头标识（HEX）":"3C2144","文件描述":""},
{"扩展名":"htm;html","文件头标识（HEX）":"3C21444F4354","文件描述":"HyperTextMarkupLanguage3"},
{"扩展名":"htm;html","文件头标识（HEX）":"3C48544D4C3E","文件描述":"HyperTextMarkupLanguage2"},
{"扩展名":"htm;html","文件头标识（HEX）":"3C68746D6C3E","文件描述":"HyperTextMarkupLanguage1"},
{"扩展名":"html","文件头标识（HEX）":"68746D6C3E","文件描述":"HTML"},
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{"扩展名":"IFF","文件头标识（HEX）":"464F524D","文件描述":""},
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{"扩展名":"ISO","文件头标识（HEX）":"4344303031","文件描述":"ISO-9660CDDiscImage(Thissignatureusuallyoccursatbyte8001,8801,or9001.)"},
{"扩展名":"ivr","文件头标识（HEX）":"2E524543","文件描述":"RealPlayervideofile(V11andlater)"},
{"扩展名":"JAR","文件头标识（HEX）":"4A4152435300","文件描述":"JARCScompressedarchive"},
{"扩展名":"jar","文件头标识（HEX）":"5F27A889","文件描述":"JARArchiveFile"},
{"扩展名":"jpg;jpeg","文件头标识（HEX）":"FFD8FF","文件描述":""},
{"扩展名":"jpg;jpe;jpeg","文件头标识（HEX）":"FFD8FFE000","文件描述":"JPGGraphicFile"},
{"扩展名":"jpg;jpe;jpeg","文件头标识（HEX）":"FFD8FFFE00","文件描述":"JPGGraphicFile"},
{"扩展名":"KGB","文件头标识（HEX）":"4B47425F61726368202D","文件描述":"KGBarchive"},
{"扩展名":"KOZ","文件头标识（HEX）":"49443303000000","文件描述":"SprintMusicStoreaudiofile(formobiledevices)"},
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{"扩展名":"lha","文件头标识（HEX）":"2D6C68352D","文件描述":"LHACompressed"},
{
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{"扩展名":"lib","文件头标识（HEX）":"213C617263683E0A","文件描述":"Unixarchiver(ar)filesandMicrosoftProgramLibraryCommonObjectFileFormat(COFF)"},
{"扩展名":"LIB","文件头标识（HEX）":"2A2420","文件描述":""},
{"扩展名":"LIT","文件头标识（HEX）":"49544F4C49544C53","文件描述":"MicrosoftReadereBookfile"},
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{"扩展名":"lnk","文件头标识（HEX）":"4C000000","文件描述":"WindowsShortcut(LinkFile)"},
{"扩展名":"lnk","文件头标识（HEX）":"4C000000011402","文件描述":"WindowsLinkFile"},
{"扩展名":"LNK","文件头标识（HEX）":"4C00000001140200","文件描述":"Windowsshortcutfile"},
{"扩展名":"log","文件头标识（HEX）":"2A2A2A2020496E7374616C6C6174696F6E205374617274656420","文件描述":"SymantecWiseInstallerlogfile"},
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{"扩展名":"lwp","文件头标识（HEX）":"576F726450726F","文件描述":"LotusWordProv9"},
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{"扩展名":"manifest","文件头标识（HEX）":"3C3F786D6C2076657273696F6E3D","文件描述":"WindowsVisualStylesheetXMLfile"},
{"扩展名":"MAR","文件头标识（HEX）":"4D41523100","文件描述":"Mozillaarchive"},
{"扩展名":"MAR","文件头标识（HEX）":"4D415243","文件描述":"Microsoft/MSNMARCarchive"},
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{"扩展名":"max","文件头标识（HEX）":"D0CF11","文件描述":""},
{"扩展名":"mdb","文件头标识（HEX）":"000100005374616E64617264204A6574204442","文件描述":"MicrosoftAccessfile"},
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{"扩展名":"mdf","文件头标识（HEX）":"010F0000","文件描述":"MicrosoftSQLServer2000database"},
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{"扩展名":"MDS","文件头标识（HEX）":"4D4544","文件描述":""},
{"扩展名":"MID;MIDI","文件头标识（HEX）":"4D546864","文件描述":"MusicalInstrumentDigitalInterface(MIDI)soundfile"},
{"扩展名":"mkv","文件头标识（HEX）":"1A45DFA3934282886D6174726F736B61","文件描述":"Matroskastreamfile"},
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{"扩展名":"MMF","文件头标识（HEX）":"4D4D4D440000","文件描述":"YamahaCorp.SyntheticmusicMobileApplicationFormat(SMAF)formultimediafilesthatcanbeplayedonhand-helddevices."},
{"扩展名":"mny","文件头标识（HEX）":"000100004D534953414D204461746162617365","文件描述":"MicrosoftMoneyfile"},
{"扩展名":"MOV","文件头标识（HEX）":"00000F","文件描述":""},
{"扩展名":"MOV","文件头标识（HEX）":"000077","文件描述":""},
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{"扩展名":"mov","文件头标识（HEX）":"6D646174","文件描述":"QuickTimeMovie"},
{"扩展名":"mp","文件头标识（HEX）":"0CED","文件描述":"MonochromePictureTIFFbitmapfile(unconfirmed)"},
{"扩展名":"MP3","文件头标识（HEX）":"494433","文件描述":"MPEG-1AudioLayer3(MP3)audiofile"},
{"扩展名":"MP3","文件头标识（HEX）":"FFFB50","文件描述":""},
{"扩展名":"mp4","文件头标识（HEX）":"000000186674797033677035","文件描述":"MPEG-4videofiles"},
{"扩展名":"MPA","文件头标识（HEX）":"000001","文件描述":""},
{"扩展名":"mpg;mpeg","文件头标识（HEX）":"000001B3","文件描述":"MPEGMovie"},
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{"扩展名":"MSC","文件头标识（HEX）":"3C3F78","文件描述":""},
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{"扩展名":"msi","文件头标识（HEX）":"2320","文件描述":"Cerius2file"},
{"扩展名":"MSV","文件头标识（HEX）":"4D535F564F494345","文件描述":"SonyMemoryStickCompressedVoicefile"},
{"扩展名":"NES","文件头标识（HEX）":"4E4553","文件描述":""},
{"扩展名":"NLS","文件头标识（HEX）":"C22020","文件描述":""},
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{"扩展名":"nsf","文件头标识（HEX）":"1A00000300001100","文件描述":"NotesDatabase"},
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{"扩展名":"ntf","文件头标识（HEX）":"30314F52444E414E43452053555256455920202020202020","文件描述":"NationalTransferFormatMapFile"},
{"扩展名":"obj","文件头标识（HEX）":"4C01","文件描述":"MicrosoftCommonObjectFileFormat(COFF)relocatableobjectcodefileforanIntel386orlater/compatibleprocessors"},
{"扩展名":"OCX","文件头标识（HEX）":"4D5A","文件描述":"ActiveXorOLECustomControl"},
{"扩展名":"OCX","文件头标识（HEX）":"4D5A90","文件描述":""},
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{"扩展名":"org;pfc","文件头标识（HEX）":"414F4C564D313030","文件描述":"AOLpersonalfilecabinet(PFC)file"},
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{"扩展名":"PBK","文件头标识（HEX）":"5B4144","文件描述":""},
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{"扩展名":"pcx","文件头标识（HEX）":"0A050108","文件描述":"PCPaintbrush(oftenassociatedwithQuakeEnginegames)"},
{
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{"扩展名":"PDF","文件头标识（HEX）":"255044","文件描述":""},
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{"扩展名":"pdf","文件头标识（HEX）":"255044462D312E","文件描述":"AdobeAcrobat"},
{"扩展名":"PDG","文件头标识（HEX）":"484802","文件描述":""},
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{"扩展名":"pic","文件头标识（HEX）":"0100000001","文件描述":"Unknowntypepicturefile"},
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{"扩展名":"PLL","文件头标识（HEX）":"24536F","文件描述":""},
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{"扩展名":"PPC","文件头标识（HEX）":"526563","文件描述":""},
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{"扩展名":"prc","文件头标识（HEX）":"424F4F4B4D4F4249","文件描述":"Palmpilotresourcefile"},
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{"扩展名":"pst","文件头标识（HEX）":"2142444E","文件描述":"MicrosoftOutlookPersonalFolderfile"},
{"扩展名":"pwl","文件头标识（HEX）":"E3828596","文件描述":"WindowsPassword"},
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{"扩展名":"RM","文件头标识（HEX）":"2E524D","文件描述":""},
{"扩展名":"rm;rmvb","文件头标识（HEX）":"2E524D46","文件描述":"RealMediastreamingmediafile"},
{"扩展名":"rpm","文件头标识（HEX）":"EDABEEDB","文件描述":"RPMArchiveFile"},
{"扩展名":"RTD","文件头标识（HEX）":"43232B44A4434DA5486472","文件描述":"RagTimedocumentfile"},
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{"扩展名":"sit","文件头标识（HEX）":"53495421","文件描述":"Stuffitv1ArchiveFile"},
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]
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