package com.xly.util;

import org.apache.commons.lang3.StringUtils;

public class InputPreprocessor {

    public static String preprocessWithCommons(String userInput) {
        if (StringUtils.isBlank(userInput)) {
            return "";
        }
        // normalizeSpace() 已经做了去除首尾空格和合并中间空格
        return StringUtils.normalizeSpace(userInput).toLowerCase();
    }
}