讀取Java I / O mp3文件

Question

我想閱讀mp3文件的詳細信息，例如持續時間，比特率，藝術家等。我可以通過閱讀以下某些行來找到一些信息：

File f=fc.getSelectedFile();
FileInputStream inp=null; 
  byte[] buffer=new byte[128];    
     inp= new FileInputStream(f)
     inp.skip(f.length()-128);
     inp.read(buffer);      

    }
    String str=new String(buffer);       
    tf.setText(str);   

我希望所有細節都清晰易讀。 我該如何實現？

Answer 1

使用MP3SPI獲取持續時間：

private static void getDurationWithMp3Spi(File file) throws UnsupportedAudioFileException, IOException {

AudioFileFormat fileFormat = AudioSystem.getAudioFileFormat(file);
if (fileFormat instanceof TAudioFileFormat) {
    Map<?, ?> properties = ((TAudioFileFormat) fileFormat).properties();
    String key = "duration";
    Long microseconds = (Long) properties.get(key);
    int mili = (int) (microseconds / 1000);
    int sec = (mili / 1000) % 60;
    int min = (mili / 1000) / 60;
    System.out.println("time = " + min + ":" + sec);
} else {
    throw new UnsupportedAudioFileException();
}

}

Answer 2

您可以使用apache tika Java API從MP3解析元數據，例如標題，專輯，流派，duraion，作曲家，藝術家等。所需的jar為tika-parsers-1.4，tika-core-1.4。

示例程序：

package com.parse.mp3;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.Parser;
import org.apache.tika.parser.mp3.Mp3Parser;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class AudioParser {

/**
 * @param args
 */
public static void main(String[] args) {
    String fileLocation = "G:/asas/album/song.mp3";

    try {

    InputStream input = new FileInputStream(new File(fileLocation));
    ContentHandler handler = new DefaultHandler();
    Metadata metadata = new Metadata();
    Parser parser = new Mp3Parser();
    ParseContext parseCtx = new ParseContext();
    parser.parse(input, handler, metadata, parseCtx);
    input.close();

    // List all metadata
    String[] metadataNames = metadata.names();

    for(String name : metadataNames){
    System.out.println(name + ": " + metadata.get(name));
    }

    // Retrieve the necessary info from metadata
    // Names - title, xmpDM:artist etc. - mentioned below may differ based
    System.out.println("----------------------------------------------");
    System.out.println("Title: " + metadata.get("title"));
    System.out.println("Artists: " + metadata.get("xmpDM:artist"));
    System.out.println("Composer : "+metadata.get("xmpDM:composer"));
    System.out.println("Genre : "+metadata.get("xmpDM:genre"));
    System.out.println("Album : "+metadata.get("xmpDM:album"));

    } catch (FileNotFoundException e) {
    e.printStackTrace();
    } catch (IOException e) {
    e.printStackTrace();
    } catch (SAXException e) {
    e.printStackTrace();
    } catch (TikaException e) {
    e.printStackTrace();
    }
    }
}