设置mimeType可以方便应用程序正确识别文件类型，常见的mimeType匹配规则见下表
| 文件后缀 | mimeType |
|---|---|
| .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 |
| 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 |
