在html的input标签type=file类型时，accept属性可以过滤文件类型。以下是常见文件的MIME对照表

{“.3gp”,”video/3gpp”},
 {“.apk”,”application/vnd.android.package-archive”},
 {“.asf”,”video/x-ms-asf”},
 {“.avi”,”video/x-msvideo”},
 {“.bin”,”application/octet-stream”},
 {“.bmp”,”image/bmp”},
 {“.c”,”text/plain”},
 {“.class”,”application/octet-stream”},
 {“.conf”,”text/plain”},
 {“.cpp”,”text/plain”},
 {“.doc”,”application/msword”},
 {“.docx”,”application/vnd.openxmlformats-officedocument.wordprocessingml.document”},
 {“.xls”,”application/vnd.ms-excel”},
 {“.xlsx”,”application/vnd.openxmlformats-officedocument.spreadsheetml.sheet”},
 {“.exe”,”application/octet-stream”},
 {“.gif”,”image/gif”},
 {“.gtar”,”application/x-gtar”},
 {“.gz”,”application/x-gzip”},
 {“.h”,”text/plain”},
 {“.htm”,”text/html”},
 {“.html”,”text/html”},
 {“.jar”,”application/java-archive”},
 {“.java”,”text/plain”},
 {“.jpeg”,”image/jpeg”},
 {“.jpg”,”image/jpeg”},
 {“.js”,”application/x-javascript”},
 {“.log”,”text/plain”},
 {“.m3u”,”audio/x-mpegurl”},
 {“.m4a”,”audio/mp4a-latm”},
 {“.m4b”,”audio/mp4a-latm”},
 {“.m4p”,”audio/mp4a-latm”},
 {“.m4u”,”video/vnd.mpegurl”},
 {“.m4v”,”video/x-m4v”},
 {“.mov”,”video/quicktime”},
 {“.mp2″,”audio/x-mpeg”},
 {“.mp3″,”audio/x-mpeg”},
 {“.mp4″,”video/mp4”},
 {“.mpc”,”application/vnd.mpohun.certificate”},
 {“.mpe”,”video/mpeg”},
 {“.mpeg”,”video/mpeg”},
 {“.mpg”,”video/mpeg”},
 {“.mpg4″,”video/mp4”},
 {“.mpga”,”audio/mpeg”},
 {“.msg”,”application/vnd.ms-outlook”},
 {“.ogg”,”audio/ogg”},
 {“.pdf”,”application/pdf”},
 {“.png”,”image/png”},
 {“.pps”,”application/vnd.ms-powerpoint”},
 {“.ppt”,”application/vnd.ms-powerpoint”},
 {“.pptx”,”application/vnd.openxmlformats-officedocument.presentationml.presentation”},
 {“.prop”,”text/plain”},
 {“.rc”,”text/plain”},
 {“.rmvb”,”audio/x-pn-realaudio”},
 {“.rtf”,”application/rtf”},
 {“.sh”,”text/plain”},
 {“.tar”,”application/x-tar”},
 {“.tgz”,”application/x-compressed”},
 {“.txt”,”text/plain”},
 {“.wav”,”audio/x-wav”},
 {“.wma”,”audio/x-ms-wma”},
 {“.wmv”,”audio/x-ms-wmv”},
 {“.wps”,”application/vnd.ms-works”},
 {“.xml”,”text/plain”},
 {“.z”,”application/x-compress”},
 {“.zip”,”application/x-zip-compressed”},
 {“”,”/“}