public void sendFile(HttpServletRequest request, HttpServletResponse response) {
String filePath = request.getParameter(
"filePath");
OutputStream os =
null;
try {
/* 前端插件无法播放amr音频，后台进行mp3转码 */
String newPath = filePath.substring(
0, filePath.lastIndexOf(
"."));
File source =
new File(filePath);
File file =
new File(newPath +
".mp3");
AudioAttributes audio =
new AudioAttributes();
Encoder encoder =
new Encoder();
audio.setCodec(
"libmp3lame");
EncodingAttributes attrs =
new EncodingAttributes();
attrs.setFormat(
"mp3");
attrs.setAudioAttributes(audio);
try {
encoder.encode(source, file, attrs);
}
catch (IllegalArgumentException | EncoderException e) {
e.printStackTrace();
}
response.setHeader(
"Content-Disposition",
"inline;filename=" + file.getName());
response.setHeader(
"Content-Type",
"audio/mpeg");
response.setHeader(
"Content-Length", String.
valueOf(file.length()));
response.setHeader(
"Accept-Ranges",
"bytes");
response.setHeader(
"Range",
"bytes=0-" + file.length());
os = response.getOutputStream();
DataInputStream in =
new DataInputStream(
new FileInputStream(file));
int bytes;
byte[] bufferOut =
new byte[
1024];
while ((bytes = in.read(bufferOut)) != -
1) {
os.write(bufferOut,
0, bytes);
}
in.close();
os.flush();
os.close();
}
catch (IOException e) {
e.printStackTrace();
}
finally {
try {
if (os !=
null) {
os.close();
}
}
catch (IOException e) {
e.printStackTrace();
}
}
}
