HTMLEscape JavaScriptEscape

/**
     * Returns a string that is equivalent to the input string, but with
     * special characters converted to HTML escape sequences.
     *
     * @param input the string to escape (<code>null</code> not permitted).
     *
     * @return A string with characters escaped.
     *
     * @since 1.0.9
     */
    public static String htmlEscape(String input) {
        if (input == null) {
            throw new IllegalArgumentException("Null 'input' argument.");
        }
        StringBuffer result = new StringBuffer();
        int length = input.length();
        for (int i = 0; i < length; i++) {
            char c = input.charAt(i);
            if (c == '&') {
                result.append("&amp;");
            }
            else if (c == '\"') {
                result.append("&quot;");
            }
            else if (c == '<') {
                result.append("&lt;");
            }
            else if (c == '>') {
                result.append("&gt;");
            }
            else if (c == '\'') {
                result.append("&#39;");
            }
            else if (c == '\\') {
                result.append("&#092;");
            }
            else {
                result.append(c);
            }
        }
        return result.toString();
    }

    /**
     * Returns a string that is equivalent to the input string, but with
     * special characters converted to JavaScript escape sequences.
     *
     * @param input the string to escape (<code>null</code> not permitted).
     *
     * @return A string with characters escaped.
     *
     * @since 1.0.13
     */
    public static String javascriptEscape(String input) {
        if (input == null) {
            throw new IllegalArgumentException("Null 'input' argument.");
        }
        StringBuffer result = new StringBuffer();
        int length = input.length();
        for (int i = 0; i < length; i++) {
            char c = input.charAt(i);
            if (c == '\"') {
                result.append("\\\"");
            }
            else if (c == '\'') {
                result.append("\\'");
            }
            else if (c == '\\') {
                result.append("\\\\");
            }
            else {
                result.append(c);
            }
        }
        return result.toString();
    }
}