request XSS 처리

public static String getCheckReqXSS(Map<String, String> map, String parameter, String default_value) {

String req_value = (map.get(parameter) == null ||  map.get(parameter).equals("")) ? default_value : map.get(parameter);

req_value = req_value.replaceAll("</?[a-zA-Z][0-9a-zA-Z가-\uD7A3ㄱ-ㅎ=/\"\'%;:,._()\\-# ]+>","");

req_value = req_value.replaceAll(">","");

req_value = req_value.replaceAll(">","");

return req_value;

}