jodd-servlet/src/main/java/jodd/servlet/ServletUtil.java
public boolean isGetParameter(final HttpServletRequest request, String name) {
		name = URLCoder.encodeQueryParam(name) + '=';
		String query = request.getQueryString();
		String[] nameValuePairs = StringUtil.splitc(query, '&');
		for (String nameValuePair : nameValuePairs) {
			if (nameValuePair.startsWith(name)) {
				return true;
			}
		}
		return false;
	}
public boolean isGetParameter(final HttpServletRequest request, String name) {
		name = URLCoder.encodeQueryParam(name) + '=';
		String query = request.getQueryString();
		String[] nameValuePairs = StringUtil.splitc(query, '&');
		for (String nameValuePair : nameValuePairs) {
			if (nameValuePair.startsWith(name)) {
				return true;
			}
		}
		return false;
	}
Checks if some parameter is in GET parameters.