如何将化学ContentStream对象转换为字节数组(byte[])？

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public byte[] convertContentStreamToByteArray(ContentStream contentStream) throws IOException {
    InputStream inputStream = contentStream.getStream();
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    byte[] buffer = new byte[4096];
    int bytesRead;
    
    try {
        while ((bytesRead = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }
        return outputStream.toByteArray();
    } finally {
        inputStream.close();
        outputStream.close();
    }
}