forked from github/dataease
63 lines
1.6 KiB
Java
63 lines
1.6 KiB
Java
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package io.dataease.commons.utils;
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import org.quartz.CronExpression;
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import org.quartz.CronScheduleBuilder;
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import org.quartz.CronTrigger;
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import org.quartz.TriggerBuilder;
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import java.util.Date;
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/**
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* @author song.tianyang
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* @Date 2020/12/17 4:06 下午
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* @Description CRON解析类
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*/
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public class CronUtils {
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/**
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* 解析表达式，获取CronTrigger
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* @param cron
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* @return
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*/
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public static CronTrigger getCronTrigger(String cron) {
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if (!CronExpression.isValidExpression(cron)) {
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throw new RuntimeException("cron :" + cron + "表达式解析错误");
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}
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return TriggerBuilder.newTrigger().withIdentity("Caclulate Date").withSchedule(CronScheduleBuilder.cronSchedule(cron)).build();
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}
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/**
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* 获取以指定时间为开始时间的下一次执行时间
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* @param cron
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* @param start
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* @return
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*/
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public static Date getNextTriggerTime(String cron, Date start) {
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if (start == null) {
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return getNextTriggerTime(cron);
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}else{
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CronTrigger trigger = getCronTrigger(cron);
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return trigger.getFireTimeAfter(start);
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}
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}
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/**
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* 获取以当前日期为准的下一次执行时间
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* @param cron
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* @return
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*/
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public static Date getNextTriggerTime(String cron) {
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Date date = null;
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try{
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CronTrigger trigger = getCronTrigger(cron);
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Date startDate = trigger.getStartTime();
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date = trigger.getFireTimeAfter(startDate);
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}catch (Exception e){
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}
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return date;
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}
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}
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