java复制一个同样的InputStream出来

    public static InputStream[] copy(InputStream inputStream) throws IOException {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ByteArrayOutputStream outputStream2 = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int length;
        while ((length = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, length);
            outputStream2.write(buffer, 0, length);
        }
        outputStream.flush();
        return new InputStream[]{new ByteArrayInputStream(outputStream.toByteArray()),new ByteArrayInputStream(outputStream2.toByteArray())};
    }

InputStream[] copiedInputStream = copy(inputStream);