NOT NULL

import java.math.BigDecimal;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;import java.util.Objects;import java.util.regex.Matcher;import java.uti

@Slf4jpublic class CronUtils { private static final SimpleDateFormat sdfCron = new SimpleDateFormat("0 mm HH * * ?"); private static final SimpleDateFormat sdfString = new SimpleDateFormat("HH:mm"); /** * 功能描述：日期转换cron表达式 * @param