语音amr文件转换为mp3文件

本文主要是介绍语音amr文件转换为mp3文件，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1.安卓前端生成amr语音文件，经过base64加密变成加密字符串

2.把加密后的字符串解密成amr文件

生成amr文件目录
String fileUrl = System.getProperty("user.dir").replace(
                           "bin", "webapps")
                           + File.separator
                           + "wfCloudRes"
                           + File.separator
                           + "image"
                           + File.separator
                           + dateStr
                           + File.separator + "topic" + File.separator + maxId;

public static String base64ToIo(String strBase64,String fileUrl) throws IOException {
       String string = strBase64;
       String fileName = fileUrl+File.separator+"audio.amr";
        String saveDir = fileUrl;
        File dir = new File(saveDir);
        if(!dir.exists()){
            dir.mkdirs();
        }
       try {
           // 解码，然后将字节转换为文件
           byte[] bytes = new BASE64Decoder().decodeBuffer(string); // 将字符串转换为byte数组

           FileOutputStream out = new FileOutputStream(fileName);
            out.write(bytes);
            out.close();

       } catch (IOException ioe) {
           ioe.printStackTrace();
       }

       return fileName;
   }

3.amr文件转换为MP3文件

这个转化要使用第三方的jar包jave-1.0.2.jar

http://www.sauronsoftware.it/projects/jave/download.php

// mp3文件目录
                       String fileTargetUrl = System.getProperty("user.dir")
                               .replace("bin", "webapps")
                               + File.separator
                               + "wfCloudRes"
                               + File.separator
                               + "image"
                               + File.separator
                               + dateStr
                               + File.separator
                               + "topic"
                               + File.separator
                               + maxId
                               + File.separator + "audio.mp3";

public static void changeToMp3(String sourcePath, String targetPath) {
       File source = new File(sourcePath);
       File target = new File(targetPath);
       AudioAttributes audio = new AudioAttributes();
       audio.setCodec("libmp3lame");
//       audio.setBitRate(new Integer(64000));
//        audio.setChannels(new Integer(2));
//        audio.setSamplingRate(new Integer(22050));

       EncodingAttributes attrs = new EncodingAttributes();
       attrs.setFormat("mp3");
       attrs.setAudioAttributes(audio);

       try {
           Encoder encoder = new Encoder();
           encoder.encode(source, target, attrs);
       } catch (IllegalArgumentException e) {
           e.printStackTrace();
       } catch (InputFormatException e) {
           e.printStackTrace();
       } catch (EncoderException e) {
           e.printStackTrace();
       }
   }

4.删除amr文件

FileUtils.deleteFile(fileUrl, "amr");

public static boolean deleteFile(String path, String suffixType) {
       boolean flag = false;
       if (StringUtils.isEmpty(path)) {
           return flag;
       }
       File file = new File(path);// 里面输入特定目录
       File temp = null;
       File[] filelist = file.listFiles();
       for (int i = 0; i < filelist.length; i++) {
           temp = filelist[i];

           if (temp.getName().endsWith(suffixType)) {// 获得文件名，如果后缀为“”，这个你自己写，就删除文件
               temp.delete();// 删除文件
               flag = true;
           }
       }
       return flag;
   }

Base64加密和解密工具类

mport java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class Base64Utils {

   public static void main(String[] args) throws Exception {


//       String strBase64 = Base64Utils.ioToBase64("d:/bubugao.amr"); // 将 io 转换为 base64编码
//       System.out.println(">>> " + strBase64);
//       System.out.println(Base64Utils.base64ToIo(strBase64,"d:/bubugao.mp3")); // 将 base64编码转换为
                                                               // 文件流，生成一幅新图片

//       System.out.println(Base64Utils.encodeBase64File("d:/bubugao.amr"));


   }

   public static String ioToBase64(String path) throws IOException {
//       String fileName = "D:/u18.jpg"; // 源文件
       String source = path;
       String strBase64 = null;
       try {
           InputStream in = new FileInputStream(source);
           // in.available()返回文件的字节长度
           byte[] bytes = new byte[in.available()];
           // 将文件中的内容读入到数组中
           in.read(bytes);
           strBase64 = new BASE64Encoder().encode(bytes); // 将字节流数组转换为字符串
           in.close();
       } catch (FileNotFoundException fe) {
           fe.printStackTrace();
       } catch (IOException ioe) {
           ioe.printStackTrace();
       }
       return strBase64;
   }

   public static String base64ToIo(String strBase64,String fileUrl) throws IOException {
       String string = strBase64;
       String fileName = fileUrl+File.separator+"audio.amr";
        String saveDir = fileUrl;
        File dir = new File(saveDir);
        if(!dir.exists()){
            dir.mkdirs();
        }
       try {
           // 解码，然后将字节转换为文件
           byte[] bytes = new BASE64Decoder().decodeBuffer(string); // 将字符串转换为byte数组

           FileOutputStream out = new FileOutputStream(fileName);
            out.write(bytes);
            out.close();

       } catch (IOException ioe) {
           ioe.printStackTrace();
       }

       return fileName;
   }

}
文件转换类的代码如下：

import it.sauronsoftware.jave.AudioAttributes;
import it.sauronsoftware.jave.Encoder;
import it.sauronsoftware.jave.EncoderException;
import it.sauronsoftware.jave.EncodingAttributes;
import it.sauronsoftware.jave.InputFormatException;

import java.io.File;

public class Mp3Convert {

   public static void changeToMp3(String sourcePath, String targetPath) {
       File source = new File(sourcePath);
       File target = new File(targetPath);
       AudioAttributes audio = new AudioAttributes();
       audio.setCodec("libmp3lame");
//       audio.setBitRate(new Integer(64000));
//        audio.setChannels(new Integer(2));
//        audio.setSamplingRate(new Integer(22050));

       EncodingAttributes attrs = new EncodingAttributes();
       attrs.setFormat("mp3");
       attrs.setAudioAttributes(audio);

       try {
           Encoder encoder = new Encoder();
           encoder.encode(source, target, attrs);
       } catch (IllegalArgumentException e) {
           e.printStackTrace();
       } catch (InputFormatException e) {
           e.printStackTrace();
       } catch (EncoderException e) {
           e.printStackTrace();
       }
   }


}