File type detect

 Библиотека для определения типа файла Apache tika

<dependency>
    <groupId>org.apache.tika</groupId>
    <artifactId>tika-core</artifactId>
    <version>1.25</version>
</dependency>
<dependency>
    <groupId>org.apache.tika</groupId>
    <artifactId>tika-parsers</artifactId>
    <version>1.25</version>
</dependency>

Detector detector = TikaConfig.getDefaultConfig().getDetector();

MediaType mimetype = detector.detect(TikaInputStream.get(resource.getInputStream()), new Metadata());

zipEntry fileName encoding problem.
private String convertToText(byte[] name) {
    Charset detectedCharset = IBM_866;
    try {
        detectedCharset = new UniversalEncodingDetector().detect(new ByteArrayInputStream(name), new Metadata());
    } catch (IOException e) {
        log.error("Error on charset detecting");
    }

    if (detectedCharset.equals(UTF_8)) {
        return new String(name, UTF_8);
    } else {
        return new String(name, IBM_866);
    }
}