ChatGPT：用java写G711a转AAC的代码

// Import necessary libraries
import java.io.File;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.sound.sampled.spi.FormatConversionProvider;
public class G711aToAAC {
    public static void main(String[] args) {
        // Get the input file
        File inputFile = new File("input.g711a");
        // Get the output file
        File outputFile = new File("output.aac");
        try {
            // Get the audio input stream from the input file
            AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(inputFile);
            // Get the audio format of the input file
            AudioFormat sourceFormat = audioInputStream.getFormat();
            // Set the target audio format
            AudioFormat targetFormat = new AudioFormat(AudioFormat.Encoding.AAC, sourceFormat.getSampleRate(), sourceFormat.getSampleSizeInBits(), sourceFormat.getChannels(), sourceFormat.getFrameSize(), sourceFormat.getFrameRate(), false);
            // Get the format conversion provider
            FormatConversionProvider formatConversionProvider = AudioSystem.getFormatConversionProviders()[0];
            // Convert the audio input stream to the target format
            AudioInputStream convertedAudioInputStream = formatConversionProvider.getAudioInputStream(targetFormat, audioInputStream);
            // Write the converted audio input stream to the output file
            AudioSystem.write(convertedAudioInputStream, AudioFileFormat.Type.AAC, outputFile);
        } catch (UnsupportedAudioFileException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}