2进制byte转16进制string

public static String byte2HexString(byte[] bytes)
    {
		String hs="";
        String stmp="";
        for (int n=0;n<bytes.length;n++) {
            stmp=(Integer.toHexString(bytes[n] & 0XFF));
            if (stmp.length()==1)
            {
            	hs=hs+"0"+stmp;
            }
            else
            {
            	hs=hs+stmp;
            }
        }
        return hs.toUpperCase();
    }