当html输入标签type=文件类型时，accept属性可以过滤文件类型。下面是常见文件的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”,”图片/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-compressed"},{".zip","application/x-zip-compressed"},{"","/"}以上的梳理，方便以后使用
