LocalDate、LocalDateTime、LocalTime 、Date 转换工具类

package com.heaven.util;

import com.alibaba.fastjson.JSON;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.util.*;

/**
 * @version v1.0
 * @ProjectName:
 * @ClassName: TimeUtils
 * @Description: JAVA  时间工具
 * @Date: 2021/3/10 下午2:39
 */
public class TimeUtils {

    @Autowired
    private CalendarService calendarService;

    public static final String Y_D_R = "yyyy-MM-dd";
    public static final String Y_D_R_H_M = "yyyy-MM-dd HH:mm";
    public static final String Y_D_R_H_M_S = "yyyy-MM-dd HH:mm:ss";
    public static final String YDR = "yyyyMMdd";
    public static final String YDRHMS = "yyyyMMddHHmmss";
    public static final String Y_D_R_0_0_0 = "yyyy-MM-dd 00:00:00";
    public static final String Y_D_R_23_59_59 = "yyyy-MM-dd 23:59:59";
    public static final String H_M_S = "HH:mm:ss";
    public static final String HMS = "HHmmss";


    /**
     * 获取当前年数值
     *
     * @return 年 2021
     */
    public static int queryCurrentYear() {
        LocalDate localDate = LocalDate.now();
        return localDate.getYear();
    }

    /**
     * 当前月
     *
     * @return 月 12
     */
    public static int queryCurrentMonth() {
        LocalDate localDate = LocalDate.now();
        return localDate.getMonthValue();
    }

    /**
     * 获取当前日
     *
     * @return 几号  10号
     */
    public static int queryCurrentDay() {
        LocalDate localDate = LocalDate.now();
        return localDate.getDayOfMonth();
    }

    /**
     * 获取今天是周几
     *
     * @return 4
     */
    public static int queryCurrentWeekDay() {
        LocalDate localDate = LocalDate.now();
        return localDate.getDayOfWeek().getValue();
    }

    /**
     * 判断今天是生日
     *
     * @return
     */
    public static Boolean todayIsBirthday(Date dateOfBirth) {
        if (null == dateOfBirth) {
            return null;
        }
        LocalDate dateOfBirthLocalDate = dateToLocalDate(dateOfBirth);
        MonthDay birthday = MonthDay.of(dateOfBirthLocalDate.getMonth(), dateOfBirthLocalDate.getDayOfMonth());
        MonthDay currentMonthDay = MonthDay.from(LocalDate.now());
        return currentMonthDay.equals(birthday);
    }

    /**
     * 两个时间相差几天
     *
     * @param date1 时间1
     * @param date2 时间2
     * @return
     */
    public static int dateDiffDay(Date date1, Date date2) {
        LocalDate l1 = dateToLocalDate(date1);
        LocalDate l2 = dateToLocalDate(date2);
        Period between = Period.between(l1, l2);
        return between.getDays();
    }

    /**
     * 两个时间相差月数
     *
     * @param date1 时间1
     * @param date2 时间2
     * @return
     */
    public static int dateDiffMonth(Date date1, Date date2) {
        LocalDate l1 = dateToLocalDate(date1);
        LocalDate l2 = dateToLocalDate(date2);
        Period between = Period.between(l1, l2);
        return between.getMonths();
    }

    /**
     * 两个时间相差年数
     *
     * @param date1 时间1
     * @param date2 时间2
     * @return
     */
    public static int dateDiffYear(Date date1, Date date2) {
        LocalDate l1 = dateToLocalDate(date1);
        LocalDate l2 = dateToLocalDate(date2);
        Period between = Period.between(l1, l2);
        return between.getYears();
    }


    /**
     * Date转换LocalDate
     *
     * @param date 时间
     * @return
     */
    public static LocalDate dateToLocalDate(Date date) {
        if (null == date) {
            return null;
        }
        return date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
    }


    /**
     * LocalDate 转换Date
     *
     * @param localDate 时间
     * @return
     */
    public static Date LocalDateToDate(LocalDate localDate) {
        if (null == localDate) {
            return null;
        }
        Instant instant = localDate.atStartOfDay(ZoneId.systemDefault()).toInstant();
        return Date.from(instant);
    }

    /**
     * 格式
     *
     * @param localDate 时间
     * @return
     */
    public static String format(LocalDate localDate, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return localDate.format(formatter);
    }

    /**
     * date转换LocalDateTime
     *
     * @param date 时间
     * @return
     */
    public static LocalDateTime dateToLocalDateTime(Date date) {
        if (null == date) {
            return null;
        }
        return date.toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime();
    }

    /**
     * LocalDateTime转换Date
     *
     * @param localDateTime 时间
     * @return
     */
    public static Date localDateTimeToDate(LocalDateTime localDateTime) {
        if (null == localDateTime) {
            return null;
        }
        Instant instant = localDateTime.atZone(ZoneId.systemDefault()).toInstant();
        return Date.from(instant);
    }


    /**
     * LocalDate 转换Date
     *
     * @param localDateTime 时间
     * @return
     */
    public static String format(LocalDateTime localDateTime, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return localDateTime.format(formatter);
    }

    /**
     * date转换LocalDateTime
     *
     * @param localDateTime 时间
     * @return
     */
    public static Date dateToLocalDateTime(LocalDateTime localDateTime) {
        Instant instant = localDateTime.atZone(ZoneId.systemDefault()).toInstant();
        return Date.from(instant);
    }

    /**
     * date转换LocalTime
     *
     * @param date 时间
     * @return
     */
    public static LocalTime dateToLocalTime(Date date) {
        if (null == date) {
            return null;
        }
        return date.toInstant().atZone(ZoneId.systemDefault()).toLocalTime();
    }

    /**
     * 格式化
     *
     * @param localTime 时间
     * @return
     */
    public static String format(LocalTime localTime, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return localTime.format(formatter);
    }

    /**
     * 获取当天时分秒总和
     *
     * @param date
     * @return
     */
    public static long getTimeInDay(Date date) {
        if (Objects.isNull(date)) {
            return -1;
        }
        return (date.getHours() * 60 + date.getMinutes()) * 60 + date.getSeconds();
    }

    /**
     * 获取前两天时分秒总和
     *
     * @param date
     * @return
     */
    public static long getTimeInNextDay(Date date) {
        if (Objects.isNull(date)) {
            return -1;
        }
        return getTimeInDay(date) + 24 * 60 * 60;
    }

    /**
     * 判断一个日期是否在两个日期之间。
     * @param date
     * @param startDate
     * @param endDate
     * @return
     */
    public static boolean isBetween(Date date,Date startDate,Date endDate){
        return date.after(startDate) && date.before(endDate);
    }

    @Test
    public  void test() {
/*        List<Map<String, Object>> list = new ArrayList<>();
        Map<String, Object> map1 = new HashMap<>();
        for (int i = 0; i < LocalDate.now().lengthOfYear(); i++) {
            Map<String, Object> map = new HashMap<>();

            map.put(LocalDate.of(2021, 01, 01).plusDays(i).toString(), 1);
            list.add(map);
        }
        String s = JSON.toJSONString(list);
        List<Map> maps = JSON.parseArray(s, Map.class);
        map1.put(LocalDate.of(2021, 01, 01).toString(), 1);
        Map map2 = maps.stream().filter(map -> map.keySet().contains(LocalDate.now().toString())).findFirst().orElse(null);
        System.out.println("map2==" + map2);
        int o = (int) map2.get(LocalDate.now().toString());
        System.out.println(o);
        System.out.println(map1);
        System.out.println(maps);
        System.out.println(s);*/
        Date date = TimeUtils.LocalDateToDate(LocalDate.now());
        System.out.println(date);
        ResultMsg < WorkCalenDar > workCalenDarByDay = calendarService.getWorkCalenDarByDay(date);

        System.out.println(workCalenDarByDay);

    }

}