解析MP3的时长，大小，上传路径

添加依赖：

<dependency>
    <groupId>org</groupId>
    <artifactId>jaudiotagger</artifactId>
    <version>2.0.3</version>
</dependency>

/**
* @desc   : 上传音乐
* @author : 毛会懂
* @create: 2020/3/10 16:37:00
**/
@RequestMapping("/upload")
public ApiResult<?> uploadMusic(@RequestParam("file") MultipartFile file){
    ApiResult<?> ret = null;

    File localFile = null;
    try {
        String fileName = file.getOriginalFilename();
        localFile = File.createTempFile(UUID.randomUUID().toString(), ".mp3");
        file.transferTo(localFile);
        //解析音乐，取长度和大小，存储路径
        Map<String,Object> map = new HashMap<>();
        String fileUrl = fileUploadBusiness.uploadPicFile(fileName, localFile);
        map.put("size",String.format("%.1f", file.getSize() / 1024.0));
        map.put("path",fileUrl);
       localFile.setReadable(Boolean.TRUE);
        try {
            MP3File f = (MP3File) AudioFileIO.read(localFile);
            MP3AudioHeader audioHeader = (MP3AudioHeader)f.getAudioHeader();
            map.put("timeLength",audioHeader.getTrackLength());;
        } catch(Exception e) {
            log.error("解析mp3错误",e);
        }

        ret = ApiResult.success(map);
    } catch (Exception e) {
        log.error("", e);
        ret = ApiResult.fail("文件上传失败！");
    } finally {
        FileUtils.deleteQuietly(localFile);
    }
    return ret;
}