/**
* Escape quotes, \, /, \r, \n, \b, \f, \t and other control characters (U+0000 through U+001F).
*
* @param s
* @return
*/
public static String escape(String s) {
if (s == null) return null;
StringBuffer sb = new StringBuffer();
escape(s, sb);
return sb.toString();
}
