上传MP3文件后，后台读取MP3信息。需要使用的引入一个jar ：   Jaudiotagger-2.2.6-SNAPSHOT.jar  下载地址

package com.hnzh.bnk.utils;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import org.jaudiotagger.audio.AudioFileIO;

import org.jaudiotagger.audio.exceptions.CannotReadException;

import org.jaudiotagger.audio.exceptions.InvalidAudioFrameException;

import org.jaudiotagger.audio.exceptions.ReadOnlyFileException;

import org.jaudiotagger.audio.mp3.MP3File;

import org.jaudiotagger.tag.TagException;

import org.jaudiotagger.tag.id3.AbstractID3v2Frame;

import org.jaudiotagger.tag.id3.AbstractID3v2Tag;

import org.jaudiotagger.tag.id3.framebody.FrameBodyAPIC;

import com.hnzh.bnk.admin.service.entity.model.Music;

import com.jfinal.kit.PathKit;

import com.jfinal.log.Log;

import io.jboot.utils.StrUtils;

/**

* MP3工具类

* @author zhaoqx

*

*/

public class MP3Utils {

protected static final Log logger = Log.getLog(MP3Utils.class);

/**

* 解析MP3获取歌名，歌手，专辑

* @param music 音乐Bean

* @return

*/

public static Music getSongInfo(Music music) {

try {

MP3File mp3File = (MP3File) AudioFileIO.read(new File(PathKit.getWebRootPath() + music.getMusicUrl()));

AbstractID3v2Tag tag = mp3File.getID3v2Tag();

String songName = "";

String singer = "";

String author = "";

//MP3AudioHeader audioHeader = (MP3AudioHeader) mp3File.getAudioHeader();

if(mp3File.getID3v2Tag() != null && mp3File.getID3v2Tag().frameMap != null){

if(tag.frameMap.get("TIT2") != null){

songName = tag.frameMap.get("TIT2").toString();//歌名

if(!StrUtils.isNotBlank(songName)){

songName = "未知歌曲";

}

music.setTitle(reg(songName));

}

if(tag.frameMap.get("TPE1") != null){

singer = mp3File.getID3v2Tag().frameMap.get("TPE1").toString();//歌手

if(!StrUtils.isNotBlank(singer)){

singer = "未知歌手";

}

music.setSinger(reg(singer));

}

if(tag.frameMap.get("TALB") != null){

author = mp3File.getID3v2Tag().frameMap.get("TALB").toString();//专辑

music.setAlbum(reg(author));

}

}

//int duration = audioHeader.getTrackLength();//时长

} catch (Exception e) {

logger.error("MP3Utils:读取MP3信息失败！");

}

return music;

}

//去除不必要的字符串

public static String reg(String input) {

return input.substring(input.indexOf('"') + 1, input.lastIndexOf('"'));

}

/**

* 获取MP3封面图片

* @param mp3File

* @return

* @throws InvalidAudioFrameException

* @throws ReadOnlyFileException

* @throws TagException

* @throws IOException

* @throws CannotReadException

*/

public static byte[] getMP3Image(Music music) {

byte[] imageData = null;

MP3File mp3File;

try {

mp3File = (MP3File) AudioFileIO.read(new File(PathKit.getWebRootPath() + music.getMusicUrl()));

AbstractID3v2Tag tag = mp3File.getID3v2Tag();

AbstractID3v2Frame frame = (AbstractID3v2Frame) tag.getFrame("APIC");

FrameBodyAPIC body = (FrameBodyAPIC) frame.getBody();

imageData = body.getImageData();

} catch (Exception e) {

logger.error("MP3Utils:读取MP3封面失败！");

return null;

}

return imageData;

}

/**

* 获取mp3图片并将其保存至指定路径下

* 如果没有读取到图片 ，则返回"/static/music/images/defulate.jpg"

* @param music mp3文件对象

* @param mp3ImageSavePath mp3图片保存位置(默认mp3ImageSavePath +"\" mp3File文件名 +".jpg" )

* @param cover 是否覆盖已有图片

* @return 生成图片路径

*/

public static String saveMP3Image(Music music, String mp3ImageSavePath, boolean cover) {

//生成mp3图片路径

//PathKit.getWebRootPath() + music.getMusicUrl() 路径前缀，修改成自己的url前缀

File file = new File(PathKit.getWebRootPath() + music.getMusicUrl());

String mp3FileLabel = file.getName();

String mp3ImageFullPath = mp3ImageSavePath + ("\\" + mp3FileLabel + ".jpg");

//若为非覆盖模式，图片存在则直接返回(不再创建)

if( !cover ) {

File tempFile = new File(mp3ImageFullPath) ;

if(tempFile.exists()) {

return mp3ImageFullPath;

}

}

//生成mp3存放目录

File saveDirectory = new File(mp3ImageSavePath);

saveDirectory.mkdirs();

//获取mp3图片

byte imageData[];

imageData = getMP3Image(music);

if(imageData == null){

logger.error("MP3Utils:读取MP3封面失败！");

//获取失败，返回默认图片路径

return "/static/music/images/defulate.jpg";

}

//若图片不存在，则直接返回null

if (null == imageData || imageData.length == 0) {

return null;

}

//保存mp3图片文件

FileOutputStream fos = null;

try {

fos = new FileOutputStream(mp3ImageFullPath);

fos.write(imageData);

fos.close();

} catch(Exception e) {

logger.error("MP3Utils:保存读取mp3图片文件失败！");

}

return mp3ImageFullPath.substring(PathKit.getWebRootPath().length(), mp3ImageFullPath.length());

}

}