判断java文件类型TikaToolKit的实例
引入依赖
<dependency> <groupId>org.apache.tika</groupId> <artifactId>tika-core</artifactId> <version>1.20</version> </dependency>
或
compile 'org.apache.tika:tika-core:1.20'
工具类
import lombok.AllArgsConstructor; import lombok.Getter; import lombok.extern.slf4j.Slf4j; import org.apache.tika.metadata.HttpHeaders; import org.apache.tika.metadata.Metadata; import org.apache.tika.metadata.TikaMetadataKeys; import org.apache.tika.parser.AutoDetectParser; import org.apache.tika.parser.ParseContext; import org.xml.sax.helpers.DefaultHandler; import java.io.File; import java.io.FileInputStream; import java.io.InputStream; import java.util.HashMap; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * tika * * @author zhy */ @Slf4j public class TikaToolUtil { /** * 获取类型 * * @param file 文件 * @return String */ public static String getMimeType(File file) { if (file.isDirectory()) { return "the target is a directory"; } AutoDetectParser parser = new AutoDetectParser(); parser.setParsers(new HashMap<>()); Metadata metadata = new Metadata(); metadata.add(TikaMetadataKeys.RESOURCE_NAME_KEY, file.getName()); try (InputStream stream = new FileInputStream(file)) { parser.parse(stream, new DefaultHandler(), metadata, new ParseContext()); } catch (Exception e) { log.error(e.getMessage()); } return metadata.get(HttpHeaders.CONTENT_TYPE); } /** * 判断是否是图片 * * @param file 文件 * @return boolean */ public static boolean isImage(File file) { String type = getMimeType(file); System.out.println(type); Pattern p = Pattern.compile(Type.IMAGE.name); Matcher m = p.matcher(type); return m.matches(); } /** * 判断是否是zip * * @param file 文件 * @return boolean */ public static boolean isZip(File file) { String type = getMimeType(file); System.out.println(type); Pattern p = Pattern.compile(Type.ZIP.name); Matcher m = p.matcher(type); return m.matches(); } /** * 判断是否是dicom * * @param file 文件 * @return boolean */ public static boolean isDicom(File file) { String type = getMimeType(file); Pattern p = Pattern.compile(Type.DCM.name); Matcher m = p.matcher(type); return m.matches(); } /** * 类型枚举 */ @Getter @AllArgsConstructor public enum Type { /** * dcm */ DCM("application/dicom"), /** * zip */ ZIP("application/zip"), /** * 图片 */ IMAGE("image/.*"), /** * 视频 */ VIDEO("video/*"); private String name; } public static void main(String[] args) { boolean image = isImage(new File("C:\\Users\\zhy\\Desktop\\dcm\\123.dcm")); System.out.println("zhy:" + image); } }
补充知识:java根据文件流判断文件类型(后缀名)
我就废话不多说了,大家还是直接看代码吧~
import java.io.FileInputStream; public class FileType{ public static String bytesToHexString(byte[] src) { StringBuilder stringBuilder = new StringBuilder(); if (src == null || src.length <= 0) { return null; } for (int i = 0; i < src.length; i++) { int v = src[i] & 0xFF; String hv = Integer.toHexString(v); if (hv.length() < 2) { stringBuilder.append(0); } stringBuilder.append(hv); } return stringBuilder.toString(); } /** * @param args */ public static void main(String[] args) throws Exception { FileInputStream is = new FileInputStream("F:\\相册\\微信图片\\03.jpg"); byte[] b = new byte[3]; is.read(b, 0, b.length); String xxx = bytesToHexString(b); xxx = xxx.toUpperCase(); System.out.println("头文件是:" + xxx); String ooo = TypeDict.checkType(xxx); System.out.println("后缀名是:" + ooo); } }
public class TypeDict { /** 常用文件的文件头如下:(以前六位为准) JPEG (jpg),文件头:FFD8FF PNG (png),文件头:89504E47 GIF (gif),文件头:47494638 TIFF (tif),文件头:49492A00 Windows Bitmap (bmp),文件头:424D CAD (dwg),文件头:41433130 Adobe Photoshop (psd),文件头:38425053 Rich Text Format (rtf),文件头:7B5C727466 XML (xml),文件头:3C3F786D6C HTML (html),文件头:68746D6C3E Email [thorough only] (eml),文件头:44656C69766572792D646174653A Outlook Express (dbx),文件头:CFAD12FEC5FD746F Outlook (pst),文件头:2142444E MS Word/Excel (xls.or.doc),文件头:D0CF11E0 MS Access (mdb),文件头:5374616E64617264204A WordPerfect (wpd),文件头:FF575043 Postscript (eps.or.ps),文件头:252150532D41646F6265 Adobe Acrobat (pdf),文件头:255044462D312E Quicken (qdf),文件头:AC9EBD8F Windows Password (pwl),文件头:E3828596 ZIP Archive (zip),文件头:504B0304 RAR Archive (rar),文件头:52617221 Wave (wav),文件头:57415645 AVI (avi),文件头:41564920 Real Audio (ram),文件头:2E7261FD Real Media (rm),文件头:2E524D46 MPEG (mpg),文件头:000001BA MPEG (mpg),文件头:000001B3 Quicktime (mov),文件头:6D6F6F76 Windows Media (asf),文件头:3026B2758E66CF11 MIDI (mid),文件头:4D546864 */ public static String checkType(String xxxx) { switch (xxxx) { case "FFD8FF": return "jpg"; case "89504E": return "png"; case "474946": return "jif"; default: return "0000"; } } }
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