需求
创建一个ContentType枚举，在文件上传下载功能中判断类型、设置Headers等
实现
public enum ContentTypeEnum {
AAC("acc","AAC音频","audio/aac"),
ABW("abw","AbiWord文件","application/x-abiword"),
ARC("arc","存档文档","application/x-freearc"),
AVIF("avif","AVIF图像","image/avif"),
AVI("avi","AVI:音频视频交错格式","video/x-msvideo"),
AZW("azw","亚马逊Kindle电子书格式","application/vnd.amazon.ebook"),
BIN("bin","任何类型的二进制数据","application/octet-stream"),
BMP("bmp","Windows OS/2位图图形","image/bmp"),
BZ("bz","BZip 存档","application/x-bzip"),
BZ2("bz2","BZip2 存档","application/x-bzip2"),
CSH("csh","C-Shell脚本","application/x-csh"),
CSS("css","级联样式表（CSS）","text/css"),
CSV("csv","逗号分隔值（CSV）","text/csv"),
DOC("doc","微软Word","application/msword"),
DOCX("docx","微软Word（OpenXML）","application/vnd.openxmlformats-officedocument.wordprocessingml.document"),
EOT("eot","MS 嵌入式 OpenType字体","application/vnd.ms-fontobject"),
EPUB("epub","电子出版物（EPUB）","application/epub+zip"),
GZ("gz","GZip 压缩存档","application/gzip"),
GIF("gif","图形交换格式（GIF）","image/gif"),
HTM("htm","超文本标记语言（HTML）","text/html"),
HTML("html","超文本标记语言（HTML）","text/html"),
ICO("ico","图标格式","image/vnd.microsoft.icon"),
ICS("ics","iCalendar格式","text/calendar"),
JAR("jar","Java存档（JAR）","application/java-archive"),
JPEG("jpeg","JPEG 图片","image/jpeg"),
JPG("jpg","JPEG 图片","image/jpeg"),
JS("js","JavaScript","text/javascript"),
JSON("json","JSON格式","application/json"),
JSONLD("jsonld","JSON-LD格式","application/ld+json"),
MID("mid","乐器数字接口（MIDI）","audio/midi"),
MIDI("midi","乐器数字接口（MIDI）","audio/midi"),
MJS("mjs","JavaScript模块","text/javascript"),
MP3("mp3","MP3音频","audio/mpeg"),
MP4("mp4","MP4视频","audio/mp4"),
MPEG("mpeg","MPEG视频","video/mpeg"),
MPKG("mpkg","苹果安装包","application/vnd.apple.installer+xml"),
ODP("odp","OpenDocument 演示文稿","application/vnd.oasis.opendocument.presentation"),
ODS("ods","OpenDocument 电子表格","application/vnd.oasis.opendocument.spreadsheet"),
ODT("odt","OpenDocument 文字文档","application/vnd.oasis.opendocument.text"),
OGA("oga","OGG音频","audio/ogg"),
OGV("ogv","OGG视频","video/ogg"),
OGX("ogx","OGG","application/ogg"),
OPUS("opus","OPUS音频","audio/opus"),
OTF("otf","OpenType字体","font/otf"),
PNG("png","便携式网络图形","image/png"),
PDF("pdf","Adobe便携式文档格式（PDF）","application/pdf"),
PHP("php","超文本预处理器","application/x-httpd-php"),
PPT("ppt","微软 PowerPoint","application/vnd.ms-powerpoint"),
PPTX("pptx","微软 PowerPoint（OpenXML）","application/vnd.openxmlformats-officedocument.presentationml.presentation"),
RAR("rar","RAR压缩包","application/vnd.rar"),
RTF("rtf","富文本格式（RTF）","application/rtf"),
SH("sh","Bourne Shell脚本","application/x-sh"),
SVG("svg","可缩放矢量图形（SVG）","image/svg+xml"),
SWF("swf","小型Web格式（SWF）或Adobe Flash文档","application/x-shockwave-flash"),
TAR("tar","磁带存档（TAR）","application/x-tar"),
TIF("tif","标记图像文件格式（TIFF）","image/tiff"),
TIFF("tiff","标记图像文件格式（TIFF）","image/tiff"),
TS("ts","MPEG传输流","video/mp2t"),
TTF("ttf","ttf标准字体","font/ttf"),
TXT("txt","文本（通常为ASCII或ISO 8859 -n","text/plain"),
VSD("vsd","微软Visio","application/vnd.visio"),
WAV("wav","波形音频格式","audio/wav"),
WEBA("weba","WEBM音频","audio/webm"),
WEBM("webm","WEBM视频","video/webm"),
WEBP("webp","WEBP图像","image/webp"),
WOFF("woff","Web开放字体格式（WOFF）","font/woff"),
WOFF2("woff2","Web开放字体格式（WOFF）","font/woff2"),
XHTML("xhtml","XHTML","application/xhtml+xml"),
XLS("xls","微软 Excel","application/vnd.ms-excel"),
XLSX("xlsx","微软 Excel（OpenXML）","application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"),
XML("xml","XML","application/xml"),
XUL("xul","XUL","application/vnd.mozilla.xul+xml"),
ZIP("zip","ZIP压缩包","application/zip"),
MIME_3GP("3gp", "3GPP 音频/视频容器", "video/3gpp"),
MIME_3GP_WITHOUT_VIDEO("3gp", "3GPP 音频/视频容器 不包含视频", "audio/3gpp2"),
MIME_3G2("3g2", "3GPP2 音频/视频容器", "video/3gpp2"),
MIME_3G2_WITHOUT_VIDEO("3g2", "3GPP2 音频/视频容器 不包含视频", "audio/3gpp2"),
MIME_7Z("7z","7-zip存档","application/x-7z-compressed")
;
private final String extension;
private final String explain;
private final String contentType;
ContentTypeEnum(String extension, String explain, String contentType){
this.extension = extension;
this.explain = explain;
this.contentType = contentType;
}
public String getExtension() {
return extension;
}
public String getExplain() {
return explain;
}
public String getContentType() {
return contentType;
}
public static ContentTypeEnum findByExtension(String extension) {
if (StringUtils.isBlank(extension)) {
return null;
}
for (ContentTypeEnum contentTypeEnum : ContentTypeEnum.values()) {
if (extension.equals(contentTypeEnum.getExtension())) {
return contentTypeEnum;
}
}
return null;
}
public static ContentTypeEnum findByType(String contentType) {
if (StringUtils.isBlank(contentType)) {
return null;
}
for (ContentTypeEnum contentTypeEnum : ContentTypeEnum.values()) {
if (contentType.equals(contentTypeEnum.getContentType())) {
return contentTypeEnum;
}
}
return null;
}
public static String getTypeByExt(String extension) {
ContentTypeEnum contentTypeEnum = findByExtension(extension);
if (Objects.nonNull(contentTypeEnum)) {
return contentTypeEnum.getContentType();
}
return "application/octet-stream";
}
}
数据来源
developer.mozilla.org/en-US/docs/…
