Java Reg. Expressions for Oracle SQL data types

I'm looking to whitelist user inputs before they are entered in my Oracle database. I have a (sloppy) method called cleanString(String param, String stringToClean).

Based on the param, the string is cleaned with replaceAll() Note: there are a lot of different Strings

Example:

if(param.equals("title")){
            retVal =stringToClean.replaceAll("[^a-zA-Z-&,\\s]", "");

Instead of going through every single possibility, are there Java regexs out there that pertain to data_types in an Oracle database? I have been missing inputs here and there because the regexs are not perfect.

i.e.

a regex that matches varchar2(255byte), one that matches varchar(20 byte), numbers, dates, etc. etc.