VSD格式 vsd是啥文件

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Mime Type（Content-Type）
MIME Type介绍 Content-Type 各种定义
多用途互联网邮件扩展（MIME ， Multipurpose Internet Mail Extensions）是一个互联网标准，它扩展了电子邮件标准，使其能够支持非ASCII字符、二进制格式附件等多种格式的邮件消息。在万维网中使用的HTTP协议中也使用了MIME的框架，标准被扩展为互联网媒体类型。通常来说，浏览器通过MIME Type区分不同的媒体资源。目前版本：1.0 。
MIME Type是经由IETF组织协商，以RFC形式作为建议标准发布在网上，通常只有一些在互联网上获得广泛应用的格式才会获得一个 MIME Type ，如果是某个客户端自己定义的格式，一般只能以application/x- 开头。处理本地的文件，在没有人告诉浏览器某个文件的MIME Type的情况下，浏览器也会做一些默认的处理，这可能和在操作系统中给文件配置的MIME Type有关。
在HTTP中， MIME Type类型被定义在Content-Type header中，每个MIME类型由3部分组成：Content-Type: [type]/[subtype] ，前者是数据大类别，后者定义具体的种类。
通过文件扩展名获取ContentType

import lombok.Getter;import org.apache.commons.lang3.StringUtils;/** * 通过文件扩展名获取ContentType [email protected] enum MimeTypeEnum {AAC("acc", "AAC音频", "audio/aac"),ABW("abw", "AbiWord文件", "application/x-abiword"),ARC("arc", "存档文件", "application/x-freearc"),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文件", "application/msword"),DOCX("docx", "Microsoft Word（OpenXML）", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"),EOT("eot", "MS Embedded OpenType字体", "application/vnd.ms-fontobject"),EPUB("epub", "电子出版物（EPUB）", "application/epub+zip"),GZ("gz", "GZip压缩档案", "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", "application/java-archive"),JPEG("jpeg", "JPEG图像", "image/jpeg"),JPG("jpg", "JPEG图像", "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"),MPEG("mpeg", "MPEG视频", "video/mpeg"),MPKG("mpkg", "苹果安装程序包", "application/vnd.apple.installer+xml"),ODP("odp", "OpenDocument演示文稿文档", "application/vnd.oasis.opendocument.presentation"),ODS("ods", "OpenDocument电子表格文档", "application/vnd.oasis.opendocument.spreadsheet"),ODT("odt", "OpenDocument文字文件", "application/vnd.oasis.opendocument.text"),OGA("oga", "OGG音讯", "audio/ogg"),OGV("ogv", "OGG视频", "video/ogg"),OGX("ogx", "OGG", "application/ogg"),OPUS("opus", "OPUS音频", "audio/opus"),OTF("otf", "otf字体", "font/otf"),PNG("png", "便携式网络图形", "image/png"),PDF("pdf", "Adobe 可移植文档格式（PDF）", "application/pdf"),PHP("php", "php", "application/x-httpd-php"),PPT("ppt", "Microsoft PowerPoint", "application/vnd.ms-powerpoint"),PPTX("pptx", "Microsoft PowerPoint（OpenXML）", "application/vnd.openxmlformats-officedocument.presentationml.presentation"),RAR("rar", "RAR档案", "application/vnd.rar"),RTF("rtf", "富文本格式", "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", "application/zip"),MIME_3GP("3gp", "3GPP audio/video container", "video/3gpp"),MIME_3GP_WITHOUT_VIDEO("3gp", "3GPP audio/video container doesn't contain video", "audio/3gpp2"),MIME_3G2("3g2", "3GPP2 audio/video container", "video/3gpp2"),MIME_3G2_WITHOUT_VIDEO("3g2", "3GPP2 audio/video containerdoesn't contain video", "audio/3gpp2"),MIME_7Z("7z", "7-zip存档", "application/x-7z-compressed");//扩展名private final String extension;//说明private final String explain;//contentType/mime类型private final String mimeType;/*** @param extension 上传的文件扩展名* @param explain类型说明* @param mimeTypeMime对应的类型*/MimeTypeEnum(String extension, String explain, String mimeType) {this.extension = extension;this.explain = explain;this.mimeType = mimeType;}/*** 通过扩展名获取枚举类型** @param extension 扩展名* @return 枚举类*/public static MimeTypeEnum getByExtension(String extension) {if (StringUtils.isEmpty(extension)) {return null;}for (MimeTypeEnum typesEnum : MimeTypeEnum.values()) {if (extension.equals(typesEnum.getExtension())) {return typesEnum;}}return null;}/*** Content-Type常用对照* 根据后缀获取Mime** @param fileType 扩展名* @return mime类型*/public static String getContentType(String fileType) {MimeTypeEnum mimeTypeEnum = MimeTypeEnum.getByExtension(fileType);if (mimeTypeEnum != null) {return mimeTypeEnum.getMimeType();}return "application/octet-stream";}}

根据文件获取MimeType的几种方式

<!-- hutool-all --><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.6.5</version></dependency><!-- commons.lang3--><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>3.7</version></dependency><!-- fastjson --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.79</version></dependency><dependency><groupId>net.sf.jmimemagic</groupId><artifactId>jmimemagic</artifactId><version>0.1.4</version></dependency>

【VSD格式 vsd是啥文件】

import cn.hutool.core.io.FileUtil;import net.sf.jmimemagic.*;import javax.activation.MimetypesFileTypeMap;import java.io.File;import java.io.IOException;import java.net.FileNameMap;import java.net.URLConnection;import java.nio.file.Files;public class MimeTypeDemo {public static void main(String[] args) {File file = FileUtil.file("d:/001.jpg");// 第一种方式String mimeType1 = "";try {Magic parser = new Magic();MagicMatch match = parser.getMagicMatch(file, false);mimeType1 = match.getMimeType();} catch (MagicParseException e) {e.printStackTrace();} catch (MagicMatchNotFoundException e) {e.printStackTrace();} catch (MagicException e) {e.printStackTrace();}System.out.println("第一种方式: " + mimeType1);// 第二种方式String mimeType2 = new MimetypesFileTypeMap().getContentType(file);System.out.println("第二种方式: " + mimeType2);// 第三种方式String mimeType3 = "";try {mimeType3 = Files.probeContentType(file.toPath());} catch (IOException e) {e.printStackTrace();}System.out.println("第三种方式: " + mimeType3);//第四种方式FileNameMap fileNameMap = URLConnection.getFileNameMap();String mimeType4 = fileNameMap.getContentTypeFor(file.getParent());System.out.println("第四种方式: " + mimeType4);// 通过文件扩展名获取ContentTypeMimeTypeEnum mimeTypeEnum = MimeTypeEnum.getByExtension("jpg");System.out.println(mimeTypeEnum.getExplain()+ " , "+mimeTypeEnum.getMimeType()+ " , "+mimeTypeEnum.getExtension());}}