yuanqu/ruoyi-common/src/main/java/com/ruoyi/common/utils/DateUtils.java

package com.ruoyi.common.utils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.*;
import java.time.temporal.TemporalAdjusters;
import java.time.*;
import java.time.temporal.TemporalAdjuster;
import java.time.temporal.TemporalAdjusters;
import java.util.*;

import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;

import org.apache.commons.lang3.time.DateFormatUtils;

/**
 * 时间工具类
 * 
 * @author ruoyi
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils
{
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

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

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM", 
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     * 
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     * 
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    /**
     * 获取当前日期, 默认格式为yyyy
     *
     * @return String
     */
    public static String getYear()
    {
        return dateTimeNow(YYYY);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format)
    {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str)
    {
        if (str == null)
        {
            return null;
        }
        try
        {
            return parseDate(str.toString(), parsePatterns);
        }
        catch (ParseException e)
        {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算相差天数 转换成正整数
     */
    public static int differentDaysByMillisecond(Date date1, Date date2)
    {
        return Math.abs((int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24)));
    }

    /**
     * 计算相差天数 小于就返回负数
     */
    public static int differentDays(Date date1, Date date2)
    {
        return (int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24));
    }

    /**
     * 计算时间差
     *
     * @param endDate 最后时间
     * @param startTime 开始时间
     * @return 时间差（天/小时/分钟）
     */
    public static String timeDistance(Date endDate, Date startTime)
    {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - startTime.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 增加 LocalDateTime ==> Date
     */
    public static Date toDate(LocalDateTime temporalAccessor)
    {
        ZonedDateTime zdt = temporalAccessor.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 增加 LocalDate ==> Date
     */
    public static Date toDate(LocalDate temporalAccessor)
    {
        LocalDateTime localDateTime = LocalDateTime.of(temporalAccessor, LocalTime.of(0, 0, 0));
        ZonedDateTime zdt = localDateTime.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 获取当前周一
     *
     * @return
     */
    public static String monday()
    {
        LocalDate now = LocalDate.now();
        LocalDate startOfWeek = now.with(DayOfWeek.MONDAY);
        return String.valueOf(startOfWeek);
    }

    /**
     * 获取上周一
     *
     * @return
     */
    public static String lastMonday()
    {
        LocalDate now = LocalDate.now();
        LocalDate lastMonday = now.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY)).minusWeeks(1);
        return String.valueOf(lastMonday);
    }

    /**
     * 获取上周日
     *
     * @return
     */
    public static String lastSunday()
    {
        LocalDate now = LocalDate.now();
        LocalDate lastMonday = now.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY)).minusWeeks(1);
        LocalDate lastSunday = lastMonday.with(TemporalAdjusters.next(DayOfWeek.SUNDAY));
        return String.valueOf(lastSunday);
    }


    /**
     * 获取上周一到周日的时间
     *
     * @return
     */
    public static List<String> LastWeekList()
    {
        // 获取当前日期
        LocalDate today = LocalDate.now();

        // 获取上周的每一天
        List<String> collect = IntStream.range(1, 8)
                .mapToObj(day -> String.valueOf(today.with(TemporalAdjusters.previous(DayOfWeek.MONDAY)).minusWeeks(1).plusDays(day - 1))).collect(Collectors.toList());
        return collect;

    }

    /**
     * 获取本周一到周日的时间
     *
     * @return
     */
    public static List<String> weekList()
    {
        // 获取当前日期
        LocalDate today = LocalDate.now();

        // 获取上周的每一天
        List<String> collect = IntStream.range(1, 8)
                .mapToObj(day -> String.valueOf(today.with(TemporalAdjusters.previous(DayOfWeek.MONDAY)).plusDays(day - 1))).collect(Collectors.toList());
        return collect;

    }



    /**
     * 增加 Date  ==> LocalDate
     */
    public static LocalDate toLocalDate(Date date)
    {
     return    date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
    }


    /**
     * 获取当月所有日期
     * @return
     */
    public static List<String> getDay(Date date){
        List<String> dateList = new ArrayList<>();
        LocalDate localDate = toLocalDate(date);
        LocalDate firstDayOfMoth = localDate.with(TemporalAdjusters.firstDayOfMonth());
        LocalDate lastDayOfMoth = localDate.with(TemporalAdjusters.lastDayOfMonth());

        for (LocalDate dateResult = firstDayOfMoth;dateResult.isBefore(lastDayOfMoth.plusDays(1));dateResult = dateResult.plusDays(1)){
            dateList.add(dateResult.toString());
        }
        return dateList;
    }

    /**
     * 判断当前日期是星期几
     *
     * @param pTime 修要判断的时间
     * @return dayForWeek 判断结果
     * @Exception 发生异常
     */

    public static int dayForWeek(String pTime) throws Exception {

        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");

        Calendar c = Calendar.getInstance();

        c.setTime(format.parse(pTime));

        int dayForWeek = 0;

        if (c.get(Calendar.DAY_OF_WEEK) == 1) {

            dayForWeek = 7;

        } else {

            dayForWeek = c.get(Calendar.DAY_OF_WEEK) - 1;

        }

        return dayForWeek;

    }

    /******
     * 获取两个日期中间的所有日期
     * @param start
     * @param end
     * @return
     */
    public static List<Date> getDatesBetween(String start, String end) {
        List<Date> dates = new ArrayList<>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        try {
            Date startDate = sdf.parse(start);
            Date endDate = sdf.parse(end);

            Calendar calendar = Calendar.getInstance();
            calendar.setTime(startDate);

            while (!calendar.getTime().after(endDate)) {
                dates.add(calendar.getTime());
                calendar.add(Calendar.DAY_OF_MONTH, 1);
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }

        return dates;
    }

    /**
     * 判断两个日期相差的天数
     *  str2 - str1
     * @return
     */
    public static int compare(String str1,String str2)
    {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        try {
            Date date1 = sdf.parse(str1);
            Date date2 = sdf.parse(str2);
            return differentDays(date1, date2);
        } catch (ParseException e) {
            e.printStackTrace();
            return 0;
        }

    }

}