编码解码Unicode

public class Unicode {

    /**
     * character to unicode
     */
    public static String encode(char c) {
        return Integer.toHexString((int) c & 0xffff);
    }

    /**
     * unicode to character
     */
    public static char decode(String unicode) {
        return (char) Integer.parseInt(unicode, 16);
    }
}