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音频转码工具，主要用于将微信语音 amr 格式转换为 mp3 格式以便在 html5 的 audio 标签中进行播放 1.调用微信提供的接口获取录音的InputStream字节流
public InputStream getInputStream(String mediaId) {
InputStream is = null;
try {
String URL_DOWNLOAD_TEMP_MEDIA = "https://api.weixin.qq.com/cgi-bin/media/get?access_token=ACCESS_TOKEN&media_id=MEDIA_ID";
String url = URL_DOWNLOAD_TEMP_MEDIA.replace("ACCESS_TOKEN", "自己写代码获取accessToken").replace("MEDIA_ID", mediaId);
URL urlGet = new URL(url);
HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();
http.setRequestMethod("GET"); // 必须是get方式请求
http.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
http.setDoOutput(true);
http.setDoInput(true);
System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 连接超时30秒
System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒
http.connect();
// 获取文件转化为byte流
is = http.getInputStream();
} catch (Exception e) {
e.printStackTrace();
}
return is;
}
2.将获取到的字节流保存为amr文件
public String downloadMediaId(HttpServletRequest request, String mediaId) {
String relfilePath = null;
InputStream inputStream = getInputStream(mediaId);
FileOutputStream fileOutputStream = null;
try {
//服务器资源保存路径
String savePath = request.getSession().getServletContext().getRealPath("/") + "upload/" + DateUtil.getYear() + "/wxmedia/audio/";
savePath = savePath + "audio/";
String filename = String.valueOf(System.currentTimeMillis()) + ".amr";
relfilePath = "upload/" + DateUtil.getYear() + "/wxmedia/audio/" + filename;
File file = new File(savePath);
if (!file.exists()) {
file.mkdirs();
}
byte[] data = new byte[1024];
int len = 0;
fileOutputStream = new FileOutputStream(savePath + filename);
while ((len = inputStream.read(data)) != -1) {
// 判断结果是否有错
if (new String(data).indexOf("errmsg") > -1) {
return null;
}
fileOutputStream.write(data, 0, len);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fileOutputStream != null) {
try {
fileOutputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return relfilePath;
}
3.将保存的amr文件转成mp3文件
public void amrToMp3(String sourcePath, String targetPath) {
File source = new File(sourcePath);
File target = new File(targetPath);
AudioUtils.amrToMp3(source, target);
}
4.所需的jar包依赖
<!--amr文件转音频map文件-->
<dependency>
<groupId>com.github.dadiyang</groupId>
<artifactId>jave</artifactId>
<version>1.0.3</version>
</dependency>
音频转码工具
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