private static String decodeUnicode(String input) {

        if (null == input)

            return input;

        int len = input.length();

        StringBuilder output = new StringBuilder(len);

        for (int x = 0; x < len; x++) {

            char ch = input.charAt(x);

            if (ch != '\\') {

                output.append(ch);

            } else {

                x++;

                if (x != len) {

                    ch = input.charAt(x);

                    if (ch == 'u') {

                        if (x + 5 > len) {

                            output.append(input.substring(x - 1));

                            x += 4;

                        } else {

                            String val = input.substring(x + 1, x + 5);

                            try {

                                output.append((char) Integer.parseInt(val, 16));

                            } catch (NumberFormatException e) {

                                output.append(input.substring(x - 1, x + 5));

                            }

                            x += 4;

                        }

                    } else

                        output.append(ch);

                }

            }

        }

        return output.toString();

    }

    private static String encodeUnicode(String input) {

        if (null == input)

            return input;

        int len = input.length();

        StringBuilder output = new StringBuilder(len * 2);

        for (int x = 0; x < len; x++) {

            char ch = input.charAt(x);

            if ((ch < ' ') || (ch > '~')) {

                output.append("\\u");

                String hex = Integer.toHexString(ch);

                for (int i = 0; i < 4 - hex.length(); i++) {

                    output.append('0');

                }

                output.append(hex);

            } else {

                output.append(ch);

            }

        }

        return output.toString();

    }