private static final char[] CHAR_32 = new char[] {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N',

        'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '2', '3', '4', '5', '6', '7', '8', '9'};

    /**

     * 获取随机字符串

     *

     * @param size

     *            长度

     * @return String 随机字符串

     */

    public static String getRandom(int size)

    {

        StringBuilder s = new StringBuilder();

        Random random = new SecureRandom();

        for (int i = 0; i < size; i++)

        {

            s.append(CHAR_32[random.nextInt(CHAR_32.length)]);

        }

        return s.toString();

    }