deliver/src/main/java/com/nosum/common/util/DateUtil.java

package com.nosum.common.util;

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;

public class DateUtil {

    public static final LocalTime MAX = LocalTime.of(23,59,59);

    /**
     * 将LocalDateTime转为自定义的时间格式的字符串
     */
    public static String getDateTimeAsString(LocalDateTime localDateTime, String format) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(format);
        return localDateTime.format(formatter);
    }


    /**
     * 将long类型的timestamp转为LocalDateTime
     */
    public static LocalDateTime getDateTimeOfTimestamp(long timestamp) {
        Instant instant = Instant.ofEpochMilli(timestamp);
        ZoneId zone = ZoneId.systemDefault();
        return LocalDateTime.ofInstant(instant, zone);
    }

    /**
     * 将LocalDateTime转为long类型的timestamp
     */
    public static long getTimestampOfDateTime(LocalDateTime localDateTime) {
        ZoneId zone = ZoneId.systemDefault();
        Instant instant = localDateTime.atZone(zone).toInstant();
        return instant.toEpochMilli();
    }

    /**
     * 将某时间字符串转为自定义时间格式的LocalDateTime
     */
    public static LocalDateTime parseStringToDateTime(String time, String format) {
        DateTimeFormatter df = DateTimeFormatter.ofPattern(format);
        return LocalDateTime.parse(time, df);
    }
}