Struts2 文件上传 之 文件类型 allowedTypes

        '.a'      : 'application/octet-stream',
        '.ai'     : 'application/postscript',
        '.aif'    : 'audio/x-aiff',
        '.aifc'   : 'audio/x-aiff',
        '.aiff'   : 'audio/x-aiff',
        '.au'     : 'audio/basic',
        '.avi'    : 'video/x-msvideo',
        '.bat'    : 'text/plain',
        '.bcpio' : 'application/x-bcpio',
        '.bin'    : 'application/octet-stream',
        '.bmp'    : 'image/x-ms-bmp',
        '.c'      : 'text/plain',
        # Duplicates :(
        '.cdf'    : 'application/x-cdf',
        '.cdf'    : 'application/x-netcdf',
        '.cpio'   : 'application/x-cpio',
        '.csh'    : 'application/x-csh',
        '.css'    : 'text/css',
        '.dll'    : 'application/octet-stream',
        '.doc'    : 'application/msword',
        '.dot'    : 'application/msword',
        '.dvi'    : 'application/x-dvi',
        '.eml'    : 'message/rfc822',
        '.eps'    : 'application/postscript',
        '.etx'    : 'text/x-setext',
        '.exe'    : 'application/octet-stream',
        '.gif'    : 'image/gif',
        '.gtar'   : 'application/x-gtar',
        '.h'      : 'text/plain',
        '.hdf'    : 'application/x-hdf',
        '.htm'    : 'text/html',
        '.html'   : 'text/html',
        '.ief'    : 'image/ief',
        '.jpe'    : 'image/jpeg',
        '.jpeg'   : 'image/jpeg',
        '.jpg'    : 'image/jpeg',
        '.js'     : 'application/x-javascript',
        '.ksh'    : 'text/plain',
        '.latex' : 'application/x-latex',
        '.m1v'    : 'video/mpeg',
        '.man'    : 'application/x-troff-man',
        '.me'     : 'application/x-troff-me',
        '.mht'    : 'message/rfc822',
        '.mhtml' : 'message/rfc822',
        '.mif'    : 'application/x-mif',
        '.mov'    : 'video/quicktime',
        '.movie' : 'video/x-sgi-movie',
        '.mp2'    : 'audio/mpeg',
        '.mp3'    : 'audio/mpeg',
        '.mpa'    : 'video/mpeg',
        '.mpe'    : 'video/mpeg',
        '.mpeg'   : 'video/mpeg',
        '.mpg'    : 'video/mpeg',
        '.ms'     : 'application/x-troff-ms',
        '.nc'     : 'application/x-netcdf',
        '.nws'    : 'message/rfc822',
        '.o'      : 'application/octet-stream',
        '.obj'    : 'application/octet-stream',
        '.oda'    : 'application/oda',
        '.p12'    : 'application/x-pkcs12',
        '.p7c'    : 'application/pkcs7-mime',
        '.pbm'    : 'image/x-portable-bitmap',
        '.pdf'    : 'application/pdf',
        '.pfx'    : 'application/x-pkcs12',
        '.pgm'    : 'image/x-portable-graymap',
        '.pl'     : 'text/plain',
        '.png'    : 'image/png',
        '.pnm'    : 'image/x-portable-anymap',
        '.pot'    : 'application/vnd.ms-powerpoint',
        '.ppa'    : 'application/vnd.ms-powerpoint',
        '.ppm'    : 'image/x-portable-pixmap',
        '.pps'    : 'application/vnd.ms-powerpoint',
        '.ppt'    : 'application/vnd.ms-powerpoint',
        '.ps'     : 'application/postscript',
        '.pwz'    : 'application/vnd.ms-powerpoint',
        '.py'     : 'text/x-python',
        '.pyc'    : 'application/x-python-code',
        '.pyo'    : 'application/x-python-code',
        '.qt'     : 'video/quicktime',
        '.ra'     : 'audio/x-pn-realaudio',
        '.ram'    : 'application/x-pn-realaudio',
        '.ras'    : 'image/x-cmu-raster',
        '.rdf'    : 'application/xml',
        '.rgb'    : 'image/x-rgb',
        '.roff'   : 'application/x-troff',
        '.rtx'    : 'text/richtext',
        '.sgm'    : 'text/x-sgml',
        '.sgml'   : 'text/x-sgml',
        '.sh'     : 'application/x-sh',
        '.shar'   : 'application/x-shar',
        '.snd'    : 'audio/basic',
        '.so'     : 'application/octet-stream',
        '.src'    : 'application/x-wais-source',
        '.sv4cpio': 'application/x-sv4cpio',
        '.sv4crc' : 'application/x-sv4crc',
        '.swf'    : 'application/x-shockwave-flash',
        '.t'      : 'application/x-troff',
        '.tar'    : 'application/x-tar',
        '.tcl'    : 'application/x-tcl',

        '.tex'    : 'application/x-tex',
        '.texi'   : 'application/x-texinfo',
        '.texinfo': 'application/x-texinfo',
        '.tif'    : 'image/tiff',
        '.tiff'   : 'image/tiff',
        '.tr'     : 'application/x-troff',
        '.tsv'    : 'text/tab-separated-values',
        '.txt'    : 'text/plain',
        '.ustar' : 'application/x-ustar',
        '.vcf'    : 'text/x-vcard',
        '.wav'    : 'audio/x-wav',
        '.wiz'    : 'application/msword',
        '.wsdl'   : 'application/xml',
        '.xbm'    : 'image/x-xbitmap',
        '.xlb'    : 'application/vnd.ms-excel',
        # Duplicates :(
        '.xls'    : 'application/excel',
        '.xls'    : 'application/vnd.ms-excel',
        '.xml'    : 'text/xml',
        '.xpdl'   : 'application/xml',
        '.xpm'    : 'image/x-xpixmap',
        '.xsl'    : 'application/xml',
        '.xwd'    : 'image/x-xwindowdump',
        '.zip'    : 'application/zip',

firefox 和 ie 的文件类型区别

firefox image/jpeg image/bmp image/gif image/png 

ie 6 image/pjpeg image/bmp image/gif image/x-png 

ie 7 image/pjpeg image/bmp image/gif image/x-png 

ie 8 image/pjpeg image/bmp image/gif image/x-png