Java轻松使用工具类实现获取wav时间长度

在Java中，工具类定义了一组公共方法，这篇文章将介绍Java中使用工具类来获取一个wav文件的时间长度，感兴趣的同学继续往下阅读吧

获取wav格式音频时长。

Maven依赖

      <dependency>
          <groupId>org</groupId>
          <artifactId>jaudiotagger</artifactId>
          <version>2.0.1</version>
      </dependency>

工具类

import org.jaudiotagger.audio.wav.util.WavInfoReader;

import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;

/** @Author huyi @Date 2021/9/30 14:46 @Description: 音频工具类 */
public class AudioWavUtils {

public static void getWavInfo(String filePath) throws Exception {
  File file = new File(filePath);
  WavInfoReader wavInfoReader = new WavInfoReader();
  RandomAccessFile raf = new RandomAccessFile(file, "r");
  // wav音频时长
  long duration = (long) (wavInfoReader.read(raf).getPreciseLength() * 1000);
  // wav音频采样率
  int sampleRate = toInt(read(raf, 24, 4));
  System.out.println("duration -> " + duration + ",sampleRate -> " + sampleRate);
  raf.close();
}

public static int toInt(byte[] b) {
  return ((b[3] << 24) + (b[2] << 16) + (b[1] << 8) + (b[0]));
}

public static byte[] read(RandomAccessFile rdf, int pos, int length) throws IOException {
  rdf.seek(pos);
  byte[] result = new byte[length];
  for (int i = 0; i < length; i++) {
    result[i] = rdf.readByte();
  }
  return result;
}

public static void main(String[] args) throws Exception {
  getWavInfo("E:\\csdn\\dzgz.wav");
}
}

输出结果：

Java轻松使用工具类实现获取wav时间长度