时间工具类

import java.sql.Timestamp;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.List;

//Arbor 2022/6/9
public class DateTimeUtils {

    /**
     * TimestampToString
     * @param timestamp
     * @param pattern
     * @return
     */
    public static String TimestampToString(Timestamp timestamp,String pattern){
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern);
        Instant instant = Instant.ofEpochMilli(timestamp.getTime());
        LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
        String format = dateTimeFormatter.format(localDateTime);
        return format;
    }

    /**
     * StringToTimestamp
     * @param datatime
     * @param pattern
     * @return
     */
    public static Timestamp StringToTimestamp(String datatime,String pattern){
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern);
        LocalDateTime parse = LocalDateTime.parse(datatime, dateTimeFormatter);
        ZonedDateTime zdt = parse.atZone(ZoneId.systemDefault());
        Timestamp timestamp = new Timestamp(zdt.toInstant().toEpochMilli());
        return timestamp;
    }

    /**
     * TimestampListToStringList
     * @param timestampList
     * @param pattern
     * @return
     */
    public static List<String> TimestampListToStringList(List<Timestamp> timestampList,String pattern){
        List<String> datatimeList = new ArrayList<>();
        for (Timestamp timestamp:timestampList) {
            String datatime = TimestampToString(timestamp, pattern);
            datatimeList.add(datatime);
        }
        return datatimeList;
    }


    /**
     * StringListToTimestampList
     * @param datatimeList
     * @param pattern
     * @return
     */
    public static List<Timestamp> StringListToTimestampList(List<String> datatimeList,String pattern){
        List<Timestamp> TimestampList = new ArrayList<>();
        for (String datatime:datatimeList) {
            Timestamp timestamp = StringToTimestamp(datatime, pattern);
            TimestampList.add(timestamp);
        }
        return TimestampList;
    }
}