public class CreateCheckCode {

    /**

     * 生成随机汉字

     * @return

     */

    public static char getRandomChar() {

        String str = "";

        int hightPos;

        int lowPos;

        Random random = new Random();

        hightPos = (176 + Math.abs(random.nextInt(39)));

        lowPos = (161 + Math.abs(random.nextInt(93)));

        byte[] b = new byte[2];

        b[0] = (Integer.valueOf(hightPos)).byteValue();

        b[1] = (Integer.valueOf(lowPos)).byteValue();

        try {

            str = new String(b, "GB2312");

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

        }

        return str.charAt(0);

    }

    public static void main(String[] args) {

        char[] words = new char[4];

        for (int i = 0; i<words.length; i++) {

            words[i] = getRandomChar();

        }

        System.out.println(words);

    }

}