远程url文件地址转成byte

public static byte[] urlTobyte(String url) throws MalformedURLException {
    URL ur = new URL(url);
    BufferedInputStream in = null;
    ByteArrayOutputStream out = null;
    try {
        in = new BufferedInputStream(ur.openStream());
        out = new ByteArrayOutputStream(1024);
        byte[] temp = new byte[1024];
        int size = 0;
        while ((size = in.read(temp)) != -1) {
            out.write(temp, 0, size);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    byte[] content = out.toByteArray();
    return content;
}