使用apache.tika判断文件类型

判断文件类型一般可采用两种方式

1. maven依赖

<!-- https://mvnrepository.com/artifact/org.apache.tika/tika-core -->
<dependency>
<groupId>org.apache.tika</groupId>
<artifactId>tika-core</artifactId>
<version>1.9</version>
</dependency>

2. 具体实现

private static String getMimeType(File file) {
if (file.isDirectory()) {
return "the target is a directory";
}

AutoDetectParser parser = new AutoDetectParser();
parser.setParsers(new HashMap<MediaType, Parser>());

Metadata metadata = new Metadata();
metadata.add(TikaMetadataKeys.RESOURCE_NAME_KEY, file.getName());

InputStream stream;
try {
stream = new FileInputStream(file);
parser.parse(stream, new DefaultHandler(), metadata, new ParseContext());
stream.close();
} catch (TikaException | SAXException | IOException e) {
e.printStackTrace();
}

return metadata.get(HttpHeaders.CONTENT_TYPE);
}

3. 常见文件类型