org.apache.tika.Tika.detect()方法的使用及代码示例

x33g5p2x  于2022-01-29 转载在 其他  
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本文整理了Java中org.apache.tika.Tika.detect()方法的一些代码示例，展示了Tika.detect()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Tika.detect()方法的具体详情如下：
包路径：org.apache.tika.Tika
类名称：Tika
方法名：detect

Tika.detect介绍

[英]Detects the media type of the given file. The type detection is based on the document content and a potential known file extension.

Use the #detect(String) method when you want to detect the type of the document without actually accessing the file.
[中]检测给定文件的媒体类型。类型检测基于文档内容和潜在的已知文件扩展名。
如果希望在不实际访问文件的情况下检测文档类型，请使用#detect（String）方法。

代码示例

代码示例来源：origin: stackoverflow.com

  1. Tika tika = new Tika();
  2. File file = ...
  3. String mimeType = tika.detect(file);

代码示例来源：origin: BroadleafCommerce/BroadleafCommerce

  1. protected void getMimeType(InputStream inputStream, String fileName, StaticAsset newAsset) {
  2.   Tika tika = new Tika();
  3.   String tikaMimeType = tika.detect(fileName);
  4.   if (tikaMimeType == null) {
  5.     try {
  6.       tikaMimeType = tika.detect(inputStream);
  7.     } catch (IOException e) {
  8.       //if tika can't resolve, don't throw exception
  9.     }
  10.   }
  11.   if (tikaMimeType != null) {
  12.     newAsset.setMimeType(tikaMimeType);
  13.   }
  14. }

代码示例来源：origin: apache/tika

  1. /**
  2.  * Detects the media type of a document with the given file name.
  3.  * The type detection is based on known file name extensions.
  4.  * <p>
  5.  * The given name can also be a URL or a full file path. In such cases
  6.  * only the file name part of the string is used for type detection. 
  7.  *
  8.  * @param name the file name of the document
  9.  * @return detected media type
  10.  */
  11. public String detect(String name) {
  12.   try {
  13.     return detect((InputStream) null, name);
  14.   } catch (IOException e) {
  15.     throw new IllegalStateException("Unexpected IOException", e);
  16.   }
  17. }

代码示例来源：origin: apache/tika

  1. @Override
  2. public String probeContentType(Path path) throws IOException {
  3.   // Try to detect based on the file name only for efficiency
  4.   String fileNameDetect = tika.detect(path.toString());
  5.   if(!fileNameDetect.equals(MimeTypes.OCTET_STREAM)) {
  6.     return fileNameDetect;
  7.   }
  8.   
  9.   // Then check the file content if necessary
  10.   String fileContentDetect = tika.detect(path);
  11.   if(!fileContentDetect.equals(MimeTypes.OCTET_STREAM)) {
  12.     return fileContentDetect;
  13.   }
  14.   
  15.   // Specification says to return null if we could not 
  16.   // conclusively determine the file type
  17.   return null;
  18. }

代码示例来源：origin: apache/tika

  1. public static void main(String[] args) throws Exception {
  2.     Tika tika = new Tika();
  4.     for (String file : args) {
  5.       String type = tika.detect(new File(file));
  6.       System.out.println(file + ": " + type);
  7.     }
  8.   }
  9. }

代码示例来源：origin: apache/tika

  1. /**
  2.  * Detects the media type of the given document. The type detection is
  3.  * based on the content of the given document stream.
  4.  * <p>
  5.  * If the document stream supports the
  6.  * {@link InputStream#markSupported() mark feature}, then the stream is
  7.  * marked and reset to the original position before this method returns.
  8.  * Only a limited number of bytes are read from the stream.
  9.  * <p>
  10.  * The given document stream is <em>not</em> closed by this method.
  11.  *
  12.  * @param stream the document stream
  13.  * @return detected media type
  14.  * @throws IOException if the stream can not be read
  15.  */
  16. public String detect(InputStream stream) throws IOException {
  17.   return detect(stream, new Metadata());
  18. }

代码示例来源：origin: apache/tika

  1. /**
  2.  * Detects the media type of the given document. The type detection is
  3.  * based on the first few bytes of a document.
  4.  * <p>
  5.  * For best results at least a few kilobytes of the document data
  6.  * are needed. See also the other detect() methods for better
  7.  * alternatives when you have more than just the document prefix
  8.  * available for type detection.
  9.  *
  10.  * @since Apache Tika 0.9
  11.  * @param prefix first few bytes of the document
  12.  * @return detected media type
  13.  */
  14. public String detect(byte[] prefix) {
  15.   try {
  16.     try (InputStream stream = TikaInputStream.get(prefix)) {
  17.       return detect(stream);
  18.     }
  19.   } catch (IOException e) {
  20.     throw new IllegalStateException("Unexpected IOException", e);
  21.   }
  22. }

代码示例来源：origin: apache/tika

  1. public static String customMimeInfo() throws Exception {
  2.   String path = "file:///path/to/prescription-type.xml";
  3.   MimeTypes typeDatabase = MimeTypesFactory.create(new URL(path));
  4.   Tika tika = new Tika(typeDatabase);
  5.   String type = tika.detect("/path/to/prescription.xpd");
  6.   return type;
  7. }

代码示例来源：origin: apache/tika

  1. public static String detectWithCustomConfig(String name) throws Exception {
  2.   String config = "/org/apache/tika/mime/tika-mimetypes.xml";
  3.   Tika tika = new Tika(MimeTypesFactory.create(config));
  4.   return tika.detect(name);
  5. }

代码示例来源：origin: apache/tika

  1. /**
  2.  * Find the Mime Content Type of a document stored in the given file.
  3.  * Returns application/octet-stream if no better match is found.
  4.  *
  5.  * @deprecated Use {@link Tika#detect(File)} instead
  6.  * @param file file to analyze
  7.  * @return the Mime Content Type of the specified document
  8.  * @throws MimeTypeException if the type can't be detected
  9.  * @throws IOException if the file can't be read
  10.  */
  11. public MimeType getMimeType(File file)
  12.     throws MimeTypeException, IOException {
  13.   return forName(new Tika(this).detect(file));
  14. }

代码示例来源：origin: apache/tika

  1. /**
  2.  * Detects the media type of the file at the given path. The type
  3.  * detection is based on the document content and a potential known
  4.  * file extension.
  5.  * <p>
  6.  * Use the {@link #detect(String)} method when you want to detect the
  7.  * type of the document without actually accessing the file.
  8.  *
  9.  * @param path the path of the file
  10.  * @return detected media type
  11.  * @throws IOException if the file can not be read
  12.  */
  13. public String detect(Path path) throws IOException {
  14.   Metadata metadata = new Metadata();
  15.   try (InputStream stream = TikaInputStream.get(path, metadata)) {
  16.     return detect(stream, metadata);
  17.   }
  18. }

代码示例来源：origin: apache/tika

  1. /**
  2.  * Detects the media type of the resource at the given URL. The type
  3.  * detection is based on the document content and a potential known
  4.  * file extension included in the URL.
  5.  * <p>
  6.  * Use the {@link #detect(String)} method when you want to detect the
  7.  * type of the document without actually accessing the URL.
  8.  *
  9.  * @param url the URL of the resource
  10.  * @return detected media type
  11.  * @throws IOException if the resource can not be read
  12.  */
  13. public String detect(URL url) throws IOException {
  14.   Metadata metadata = new Metadata();
  15.   try (InputStream stream = TikaInputStream.get(url, metadata)) {
  16.     return detect(stream, metadata);
  17.   }
  18. }

代码示例来源：origin: apache/tika

  1. /**
  2.  * Detects the media type of the given file. The type detection is
  3.  * based on the document content and a potential known file extension.
  4.  * <p>
  5.  * Use the {@link #detect(String)} method when you want to detect the
  6.  * type of the document without actually accessing the file.
  7.  *
  8.  * @param file the file
  9.  * @return detected media type
  10.  * @throws IOException if the file can not be read
  11.  * @see #detect(Path)
  12.  */
  13. public String detect(File file) throws IOException {
  14.   Metadata metadata = new Metadata();
  15.   try (@SuppressWarnings("deprecation")
  16.   InputStream stream = TikaInputStream.get(file, metadata)) {
  17.     return detect(stream, metadata);
  18.   }
  19. }

代码示例来源：origin: apache/tika

  1. private static void benchmark(File file) throws Exception {
  2.   if (file.isHidden()) {
  3.     // ignore
  4.   } else if (file.isFile()) {
  5.     try (InputStream input = new FileInputStream(file)) {
  6.       byte[] content = IOUtils.toByteArray(input);
  7.       String type =
  8.           tika.detect(new ByteArrayInputStream(content));
  9.       long start = System.currentTimeMillis();
  10.       for (int i = 0; i < 1000; i++) {
  11.         tika.detect(new ByteArrayInputStream(content));
  12.       }
  13.       System.out.printf(
  14.           Locale.ROOT,
  15.           "%6dns per Tika.detect(%s) = %s%n",
  16.           System.currentTimeMillis() - start, file, type);
  17.     }
  18.   } else if (file.isDirectory()) {
  19.     for (File child : file.listFiles()) {
  20.       benchmark(child);
  21.     }
  22.   }
  23. }

代码示例来源：origin: apache/tika

  1. public static String customCompositeDetector() throws Exception {
  2.   String path = "file:///path/to/prescription-type.xml";
  3.   MimeTypes typeDatabase = MimeTypesFactory.create(new URL(path));
  4.   Tika tika = new Tika(new CompositeDetector(typeDatabase,
  5.       new EncryptedPrescriptionDetector()));
  6.   String type = tika.detect("/path/to/tmp/prescription.xpd");
  7.   return type;
  8. }

代码示例来源：origin: apache/tika

  1. public static String detectWithCustomDetector(String name) throws Exception {
  2.     String config = "/org/apache/tika/mime/tika-mimetypes.xml";
  3.     Detector detector = MimeTypesFactory.create(config);
  5.     Detector custom = new Detector() {
  6.       private static final long serialVersionUID = -5420638839201540749L;
  8.       public MediaType detect(InputStream input, Metadata metadata) {
  9.         String type = metadata.get("my-custom-type-override");
  10.         if (type != null) {
  11.           return MediaType.parse(type);
  12.         } else {
  13.           return MediaType.OCTET_STREAM;
  14.         }
  15.       }
  16.     };
  18.     Tika tika = new Tika(new CompositeDetector(custom, detector));
  19.     return tika.detect(name);
  20.   }
  21. }

代码示例来源：origin: apache/tika

  1. @Test
  2. public void testByteOrderMark() throws Exception {
  3.   assertEquals(MediaType.TEXT_PLAIN.toString(), tika.detect(
  4.       new ByteArrayInputStream("\ufefftest".getBytes(UTF_16LE)),
  5.       new Metadata()));
  6.   assertEquals(MediaType.TEXT_PLAIN.toString(), tika.detect(
  7.       new ByteArrayInputStream("\ufefftest".getBytes(UTF_16BE)),
  8.       new Metadata()));
  9.   assertEquals(MediaType.TEXT_PLAIN.toString(), tika.detect(
  10.       new ByteArrayInputStream("\ufefftest".getBytes(UTF_8)),
  11.       new Metadata()));
  12. }

代码示例来源：origin: apache/tika

  1. private void testStream(String expected, String urlOrFileName,
  2.     InputStream in) throws IOException {
  3.   assertNotNull("Test stream: [" + urlOrFileName + "] is null!", in);
  4.   if (!in.markSupported()) {
  5.     in = new java.io.BufferedInputStream(in);
  6.   }
  7.   try {
  8.     Metadata metadata = new Metadata();
  9.     // String mime = this.proDetector.detect(in, metadata).toString();
  10.     String mime = tika.detect(in, metadata).toString();
  11.     assertEquals(
  12.         urlOrFileName + " is not properly detected: detected.",
  13.         expected, mime);
  14.     // Add resource name and test again
  15.     metadata.set(TikaCoreProperties.RESOURCE_NAME_KEY, urlOrFileName);
  16.     // mime = this.proDetector.detect(in, metadata).toString();
  17.     mime = tika.detect(in, metadata).toString();
  18.     assertEquals(urlOrFileName
  19.         + " is not properly detected after adding resource name.",
  20.         expected, mime);
  21.   } finally {
  22.     in.close();
  23.   }
  24. }

代码示例来源：origin: apache/tika

  1. /**
  2.  * Test for things like javascript files whose content is enclosed in XML
  3.  * comment delimiters, but that aren't actually XML.
  4.  * 
  5.  * @see <a
  6.  *      href="https://issues.apache.org/jira/browse/TIKA-426">TIKA-426</a>
  7.  */
  8. @Test
  9. public void testNotXML() throws IOException {
  10.   assertEquals(MediaType.TEXT_PLAIN.toString(), tika.detect(
  11.       new ByteArrayInputStream("<!-- test -->".getBytes(UTF_8)),
  12.       new Metadata()));
  13. }

代码示例来源：origin: apache/tika

  1. /**
  2.  * Test for type detection of empty documents.
  3.  * 
  4.  * @see <a
  5.  *      href="https://issues.apache.org/jira/browse/TIKA-483">TIKA-483</a>
  6.  */
  7. @Test
  8. public void testEmptyDocument() throws IOException {
  9.   assertEquals(MediaType.OCTET_STREAM.toString(), tika.detect(
  10.       new ByteArrayInputStream(new byte[0]), new Metadata()));
  11.   Metadata namehint = new Metadata();
  12.   namehint.set(TikaCoreProperties.RESOURCE_NAME_KEY, "test.txt");
  13.   assertEquals(MediaType.TEXT_PLAIN.toString(),
  14.       tika.detect(new ByteArrayInputStream(new byte[0]), namehint));
  15.   Metadata typehint = new Metadata();
  16.   typehint.set(Metadata.CONTENT_TYPE, "text/plain");
  17.   assertEquals(MediaType.TEXT_PLAIN.toString(),
  18.       tika.detect(new ByteArrayInputStream(new byte[0]), typehint));
  19. }

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