cron獲取下次執行時間

package com.cjhd.fruit.hall.activity.handler;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.springframework.scheduling.support.CronSequenceGenerator;

public class Test {

    public static void main(String[] args) throws Exception {
        CronSequenceGenerator cronSequenceGenerator = new CronSequenceGenerator("0 0 14,16,18 * * ?");
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        List<String> list = new ArrayList<>(20);
        Date nextTimePoint = new Date();
        for (int i = 0; i < 20; i++) {
            // 計算下次時間點的開始時間
            nextTimePoint = cronSequenceGenerator.next(nextTimePoint);
            list.add(sdf.format(nextTimePoint));
        }
        
        for (String string : list) {
            System.out.println(string);
        }
    }
}