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There is a newer version: 1.2.8

package top.isopen.commons.springboot.util;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 命名工具类
 *
 * @author TimeChaser
 * @version 1.0
 * @since 2023/7/7 17:48
 */
public class NameUtil {

    /**
     * 驼峰转下划线
     *
     * @param str 目标字符串
     * @return java.lang.String
     */
    public static String humpToUnderline(String str) {
        String regex = "([A-Z])";
        Matcher matcher = Pattern.compile(regex).matcher(str);
        while (matcher.find()) {
            String target = matcher.group();
            str = str.replaceAll(target, "_" + target.toLowerCase());
        }
        return str;
    }

    /**
     * 下划线转驼峰
     *
     * @param str 目标字符串
     * @return java.lang.String
     */
    public static String underlineToHump(String str) {
        String regex = "_(.)";
        Matcher matcher = Pattern.compile(regex).matcher(str);
        while (matcher.find()) {
            String target = matcher.group(1);
            str = str.replaceAll("_" + target, target.toUpperCase());
        }
        return str;
    }

}