java的localdatetime和localdate时间处理

LocalDateTime localDateTime = LocalDateTime.now();
        LocalDateTime minTime = localDateTime.with(LocalTime.MIN);
        LocalDateTime maxTime = localDateTime.with(LocalTime.MAX);
        Set<String> times = DateUtils.getTimes(Date.from(minTime.atZone(ZoneId.systemDefault()).toInstant()), Date.from(maxTime.atZone(ZoneId.systemDefault()).toInstant()));

package com.zygh.traffic.common.utils.date;

import cn.hutool.core.date.LocalDateTimeUtil;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.*;
import java.util.*;

/**
 * 时间工具类
 *
 * @author 芋道源码
 */
public class DateUtils {

    /**
     * 时区 - 默认
     */
    public static final String TIME_ZONE_DEFAULT = "GMT+8";

    /**
     * 秒转换成毫秒
     */
    public static final long SECOND_MILLIS = 1000;

    public static final String FORMAT_YEAR_MONTH_DAY_HOUR_MINUTE_SECOND = "yyyy-MM-dd HH:mm:ss";

    public static final String FORMAT_HOUR_MINUTE_SECOND = "HH:mm:ss";

    /**
     * 将 LocalDateTime 转换成 Date
     *
     * @param date LocalDateTime
     * @return LocalDateTime
     */
    public static Date of(LocalDateTime date) {
        // 将此日期时间与时区相结合以创建 ZonedDateTime
        ZonedDateTime zonedDateTime = date.atZone(ZoneId.systemDefault());
        // 本地时间线 LocalDateTime 到即时时间线 Instant 时间戳
        Instant instant = zonedDateTime.toInstant();
        // UTC时间(世界协调时间,UTC + 00:00)转北京(北京,UTC + 8:00)时间
        return Date.from(instant);
    }

    /**
     * 将 Date 转换成 LocalDateTime
     *
     * @param date Date
     * @return LocalDateTime
     */
    public static LocalDateTime of(Date date) {
        // 转为时间戳
        Instant instant = date.toInstant();
        // UTC时间(世界协调时间,UTC + 00:00)转北京(北京,UTC + 8:00)时间
        return LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
    }

    @Deprecated
    public static Date addTime(Duration duration) {
        return new Date(System.currentTimeMillis() + duration.toMillis());
    }

    public static boolean isExpired(Date time) {
        return System.currentTimeMillis() > time.getTime();
    }

    public static boolean isExpired(LocalDateTime time) {
        LocalDateTime now = LocalDateTime.now();
        return now.isAfter(time);
    }

    public static long diff(Date endTime, Date startTime) {
        return endTime.getTime() - startTime.getTime();
    }

    /**
     * 创建指定时间
     *
     * @param year  年
     * @param mouth 月
     * @param day   日
     * @return 指定时间
     */
    public static Date buildTime(int year, int mouth, int day) {
        return buildTime(year, mouth, day, 0, 0, 0);
    }

    /**
     * 创建指定时间
     *
     * @param year   年
     * @param mouth  月
     * @param day    日
     * @param hour   小时
     * @param minute 分钟
     * @param second 秒
     * @return 指定时间
     */
    public static Date buildTime(int year, int mouth, int day,
                                 int hour, int minute, int second) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.YEAR, year);
        calendar.set(Calendar.MONTH, mouth - 1);
        calendar.set(Calendar.DAY_OF_MONTH, day);
        calendar.set(Calendar.HOUR_OF_DAY, hour);
        calendar.set(Calendar.MINUTE, minute);
        calendar.set(Calendar.SECOND, second);
        calendar.set(Calendar.MILLISECOND, 0); // 一般情况下，都是 0 毫秒
        return calendar.getTime();
    }

    public static Date max(Date a, Date b) {
        if (a == null) {
            return b;
        }
        if (b == null) {
            return a;
        }
        return a.compareTo(b) > 0 ? a : b;
    }

    public static LocalDateTime max(LocalDateTime a, LocalDateTime b) {
        if (a == null) {
            return b;
        }
        if (b == null) {
            return a;
        }
        return a.isAfter(b) ? a : b;
    }

    /**
     * 计算当期时间相差的日期
     *
     * @param field  日历字段.<br/>eg:Calendar.MONTH,Calendar.DAY_OF_MONTH,<br/>Calendar.HOUR_OF_DAY等.
     * @param amount 相差的数值
     * @return 计算后的日志
     */
    public static Date addDate(int field, int amount) {
        return addDate(null, field, amount);
    }

    /**
     * 计算当期时间相差的日期
     *
     * @param date   设置时间
     * @param field  日历字段 例如说，{@link Calendar#DAY_OF_MONTH} 等
     * @param amount 相差的数值
     * @return 计算后的日志
     */
    public static Date addDate(Date date, int field, int amount) {
        if (amount == 0) {
            return date;
        }
        Calendar c = Calendar.getInstance();
        if (date != null) {
            c.setTime(date);
        }
        c.add(field, amount);
        return c.getTime();
    }

    /**
     * 是否今天
     *
     * @param date 日期
     * @return 是否
     */
    public static boolean isToday(LocalDateTime date) {
        return LocalDateTimeUtil.isSameDay(date, LocalDateTime.now());
    }

    /**
     * 传入两个时间范围，返回这两个时间范围内的所有日期，并保存在一个集合中
     * @param beginTime
     * @param endTime
     * @return
     * @throws ParseException
     */
    public static List<String> findEveryDay(String beginTime, String endTime)
            throws ParseException {
        //1.创建一个放所有日期的集合
        List<String> dates = new ArrayList();
        //2.创建时间解析对象规定解析格式
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        //3.将传入的时间解析成Date类型,相当于格式化
        Date dBegin = sdf.parse(beginTime);
        Date dEnd = sdf.parse(endTime);
        //4.将格式化后的第一天添加进集合
        dates.add(sdf.format(dBegin));
        //5.使用本地的时区和区域获取日历
        Calendar calBegin = Calendar.getInstance();
        //6.传入起始时间将此日历设置为起始日历
        calBegin.setTime(dBegin);
        //8.判断结束日期是否在起始日历的日期之后
        while (dEnd.after(calBegin.getTime())) {
            // 9.根据日历的规则:月份中的每一天，为起始日历加一天
            calBegin.add(Calendar.DAY_OF_MONTH, 1);
            //10.得到的每一天就添加进集合
            dates.add(sdf.format(calBegin.getTime()));
            //11.如果当前的起始日历超过结束日期后,就结束循环
        }
        return dates;
    }

    /**
     * 获取一段时间范围内所有时分时间，[01:00, 02:00, 03:00, ...]
     */
    public static Set<String> getTimes(Date fromDate, Date toDate) {

        Set<String> times = new HashSet<>();
        SimpleDateFormat dateFormat = new SimpleDateFormat(
                "HH:mm");
        List<Date> hourlyInterval = getHourlyInterval(fromDate, toDate);
        for (Date date : hourlyInterval) {
            times.add(dateFormat.format(date));
        }
        return times;
    }

    private static List<Date> getHourlyInterval(Date fromDate, Date toDate) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(fromDate);
        List<Date> hourlyInterval = new ArrayList<>();
        hourlyInterval.add(calendar.getTime());
        while (calendar.getTime().before(toDate)) {
            calendar.add(Calendar.HOUR_OF_DAY, 1);
            hourlyInterval.add(calendar.getTime());
        }
        return hourlyInterval;
    }


}

/**
 * 获取每个月数据
 * @param d1
 * @param d2
 * @return
 */
public static List<String> getMonth(Date d1, Date d2) {
    List<String> result = new ArrayList<>();
    Calendar dd = Calendar.getInstance();//定义日期实例
    dd.setTime(d1);//设置日期起始时间
    while (dd.getTime().before(d2)) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
        String str = sdf.format(dd.getTime());
        dd.add(Calendar.MONTH, 1);//进行当前日期月份加1
        result.add(str);
    }
    return result;
}

 

/ 获取今年第一天及最后一天
LocalDateTime firstDayOfYear = LocalDateTime.of(LocalDate.from(LocalDateTime.now().with(TemporalAdjusters.firstDayOfYear())), LocalTime.MIN);
LocalDateTime lastDayOfYear = LocalDateTime.of(LocalDate.from(LocalDateTime.now().with(TemporalAdjusters.lastDayOfYear())), LocalTime.MAX);

// 获取当前月第一天及最后一天
LocalDateTime firstDayOfMonth = LocalDateTime.of(LocalDate.from(LocalDateTime.now().with(TemporalAdjusters.firstDayOfMonth())), LocalTime.MIN);
LocalDateTime lastDayOfMonth = LocalDateTime.of(LocalDate.from(LocalDateTime.now().with(TemporalAdjusters.lastDayOfMonth())), LocalTime.MAX);


// 获取当天的起始时间
LocalDateTime firstTimeOfDay = LocalDateTime.of(LocalDate.now(), LocalTime.MIN);
LocalDateTime lastTimeOfDay = LocalDateTime.of(LocalDate.now(), LocalTime.MAX);

// 获取当天日期
LocalDate now = LocalDate.now();

// 当天开始时间
LocalDateTime todayStart = now.atStartOfDay();
// 当天结束时间
LocalDateTime todayEnd = LocalDateTime.of(now, LocalTime.MAX);

// 周一
LocalDate monday = now.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY));
// 周日
LocalDate sunday = now.with(TemporalAdjusters.nextOrSame(DayOfWeek.SUNDAY));

// 本周开始时间
LocalDateTime weekStart = monday.atStartOfDay();
// 本周结束时间
LocalDateTime weekEnd = LocalDateTime.of(sunday, LocalTime.MAX);

// 本月1号
LocalDate firstDayOfMonth = now.with(TemporalAdjusters.firstDayOfMonth());
// 本月最后一天
LocalDate lastDayOfMonth = now.with(TemporalAdjusters.lastDayOfMonth());

// 本月1号的开始时间
LocalDateTime firstDayOfMonthStart = firstDayOfMonth.atStartOfDay();
// 本月最后一天的最后时间
LocalDateTime firstDayOfMonthEnd = LocalDateTime.of(lastDayOfMonth, LocalTime.MAX);

// 今年第一天
LocalDate beginTime = LocalDate.now().with(TemporalAdjusters.firstDayOfYear());
// 今年最后一天
LocalDate endTiime = LocalDate.now().with(TemporalAdjusters.lastDayOfYear());

//获取前一天日期
LocalDate yesterday2 = LocalDate.now().minusDays(1);

 localdate和localdatetime的转换

LocalDate paymentDutDate = byId.getPaymentDutDate();
                LocalDate minusDays = paymentDutDate.minusDays(nodeReminderSettingDTO.getRemindDay());
                LocalDateTime localDateTime = minusDays.atTime(Integer.parseInt(nodeReminderSettingDTO.getRemindHour().split(":")[0]), Integer.parseInt(nodeReminderSettingDTO.getRemindHour().split(":")[1]), 59);

 获取一天里面二十四小时

 /**
     * 获取一段时间范围内所有时分时间，[01:00, 02:00, 03:00, ...]
     */
    public static Set<String> getTimes(Date fromDate, Date toDate) {

        Set<String> times = new HashSet<>();
        SimpleDateFormat dateFormat = new SimpleDateFormat(
                "HH:mm");
        List<Date> hourlyInterval = getHourlyInterval(fromDate, toDate);
        for (Date date : hourlyInterval) {
            times.add(dateFormat.format(date));
        }
        return times;
    }

    private static List<Date> getHourlyInterval(Date fromDate, Date toDate) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(fromDate);
        List<Date> hourlyInterval = new ArrayList<>();
        hourlyInterval.add(calendar.getTime());
        while (calendar.getTime().before(toDate)) {
            calendar.add(Calendar.HOUR_OF_DAY, 1);
            hourlyInterval.add(calendar.getTime());
        }
        return hourlyInterval;
    }