rongzidanbao/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.util.Calendar;
import java.util.Date;
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);
    }

    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
     */
    public static int differentDaysByMillisecond(Date date1, Date date2)
    {
        return Math.abs((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());
    }

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

    public static int getWeekOfMonth(Date date)
    {
        Calendar calendar = Calendar.getInstance();
        // 设置每周的第一天是周一（Calendar.MONDAY = 2）
        calendar.setFirstDayOfWeek(Calendar.MONDAY);
        // 设置一周的最小天数为1天（不足一周则补至下周）
        calendar.setMinimalDaysInFirstWeek(1);
        calendar.setTime(date);
        int weekOfMonth = calendar.get(Calendar.WEEK_OF_MONTH);
        return weekOfMonth;
    }
    /**
     * 获取时间戳
     *
     * @return
     */
    public static String getUnix() {
        return Long.toString(System.currentTimeMillis() / 1000L);
    }

    /**
     * 返回 年月日小时分秒 毫秒
     *
     * @return yyyyMMddHHmmssS
     */
    public static String getTodayChar() {
        String dateString = DateFormatUtils.format(new Date(), "yyyyMMddHHmmssS");
        int length = dateString.length();

        if (length < 17) {
            StringBuilder endStr = new StringBuilder(dateString.substring(14, length));
            int len = endStr.length();
            for (int i = 0; i < 3 - len; i++) {
                endStr.insert(0, "0");
            }
            dateString = dateString.substring(0, 14) + endStr;
        }
        return dateString;
    }

    /**
     * 判断一个字字符串能不能转成LONG
     *
     * @return yyyyMMddHHmmssS
     */
    public static boolean isNumeric(String strNum) {
        try {
            // 尝试将字符串转换为数字
            Long num = Long.parseLong(strNum);
            // 是数字，返回true
            return true;
        } catch (NumberFormatException e) {
            // 不是数字，捕获异常并返回false
            return false;
        }
    }

    /**
     * 获取当前月
     *
     * @return
     */
    public static String getMonth()
    {
        LocalDate currentDate = LocalDate.now();
        int currentMonth = currentDate.getMonthValue();
        return String.valueOf(currentMonth);
    }

    /**
     * 获取当前日
     *
     * @return
     */
    public static String getDay()
    {
        LocalDate now = LocalDate.now();
        int day = now.getDayOfMonth();
        return String.valueOf(day);
    }

    /**
     * 两个日期之间相差的月数
     * @param date1 开始时间
     * @param date2 结束时间
     * @return
     */
    public static int calculateMonths(String date1, String date2) {
        LocalDate localDate1 = LocalDate.parse(date1);
        LocalDate localDate2 = LocalDate.parse(date2);
        Period period = Period.between(localDate1, localDate2);
        return period.getMonths();
    }

}