DateUtils 工具类

Posted 2022-12-08 胡金水

package com.util.jwt;


import org.apache.commons.lang3.StringUtils;

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

/**
 * @author: HuGoldWater
 * @description:
 */
public class DateUtils 

    private static final String FORMAT_YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
    private static final String FORMAT_YYYY_MM_DD = "yyyy-MM-dd";


    /**
     * 获得当前年份
     *
     * @return
     */
    public static int getYear() 
        return Calendar.getInstance().get(Calendar.YEAR);
    

    /**
     * 获得当前月份
     *
     * @return
     */
    public static int getMonth() 
        return Calendar.getInstance().get(Calendar.MONTH) + 1;
    

    /**
     * 获得今天在本年的第几天
     *
     * @return
     */
    public static int getDayOfYear() 
        return Calendar.getInstance().get(Calendar.DAY_OF_YEAR);
    

    /**
     * 获得今天在本月的第几天(获得当前日)
     *
     * @return
     */
    public static int getDayOfMonth() 
        return Calendar.getInstance().get(Calendar.DAY_OF_MONTH);
    

    /**
     * 获得今天在本周的第几天
     *
     * @return
     */
    public static int getDayOfWeek() 
        return Calendar.getInstance().get(Calendar.DAY_OF_WEEK);
    

    /**
     * 获得今天是这个月的第几周
     *
     * @return
     */
    public static int getWeekOfMonth() 
        return Calendar.getInstance().get(Calendar.DAY_OF_WEEK_IN_MONTH);
    

    /**
     * 获得半年后的日期
     *
     * @return
     */
    public static Date getTimeYearNext() 
        Calendar.getInstance().add(Calendar.DAY_OF_YEAR, 183);
        return Calendar.getInstance().getTime();
    

    /**
     * 将日期转换成字符串
     *
     * @param dateTime
     * @return yyyy-MM-dd
     */
    public static String dateToString(Date dateTime) 
        return dateToString(dateTime, FORMAT_YYYY_MM_DD);
    


    /**
     * 将日期转换成字符串
     *
     * @param dateTime
     * @param format
     * @return
     */
    public static String dateToString(Date dateTime, String format) 
        SimpleDateFormat df = new SimpleDateFormat(format);
        return df.format(dateTime);
    

    /**
     * 获取当天零点零分零秒
     *
     * @return
     */
    public static Date getCurrentDayToDate() 
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(new Date());
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        Date zero = calendar.getTime();
        return zero;
    

    /**
     * 获取当天零点零分零秒
     *
     * @return
     */
    public static long getCurrentDayToLong() 
        long current = System.currentTimeMillis();
        return current / (1000 * 3600 * 24) * (1000 * 3600 * 24) - TimeZone.getDefault().getRawOffset();
    

    /**
     * 获得当前日期 yyyy-MM-dd HH:mm:ss
     *
     * @return 2019-08-27 14:12:40
     */
    public static String getCurrentTime() 
        // 小写的hh取得12小时，大写的HH取的是24小时
        SimpleDateFormat df = new SimpleDateFormat(FORMAT_YYYY_MM_DD_HH_MM_SS);
        Date date = new Date();
        return df.format(date);
    

    /**
     * 获取系统当前时间戳
     *
     * @return 1566889186583
     */
    public static String getSystemTime() 
        String current = String.valueOf(System.currentTimeMillis());
        return current;
    


    /**
     * 获取当前日期 yy-MM-dd
     *
     * @return 2019-08-27
     */
    public static String getDateByString() 
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_YYYY_MM_DD);
        return sdf.format(date);
    

    /**
     * 得到两个时间差  格式yyyy-MM-dd HH:mm:ss
     *
     * @param start 2019-06-27 14:12:40
     * @param end   2019-08-27 14:12:40
     * @return 5270400000
     */
    public static long dateSubtraction(String start, String end) 
        SimpleDateFormat df = new SimpleDateFormat(FORMAT_YYYY_MM_DD_HH_MM_SS);
        try 
            Date date1 = df.parse(start);
            Date date2 = df.parse(end);
            return date2.getTime() - date1.getTime();
         catch (ParseException e) 
            return 0;
        
    

    /**
     * 得到两个时间差
     *
     * @param start 开始时间
     * @param end   结束时间
     * @return
     */
    public static long dateTogether(Date start, Date end) 
        return end.getTime() - start.getTime();
    

    /**
     * 转化long值的日期为yyyy-MM-dd  HH:mm:ss.SSS格式的日期
     *
     * @param millSec 日期long值  5270400000
     * @return 日期，以yyyy-MM-dd  HH:mm:ss.SSS格式输出 1970-03-03  08:00:00.000
     */
    public static String transferLongToDate(String millSec) 
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd  HH:mm:ss.SSS");
        Date date = new Date(Long.parseLong(millSec));
        return sdf.format(date);
    

    /**
     * 获得当前日期 yyyy-MM-dd HH:mm:ss
     *
     * @return
     */
    public static String getOkDate(String date) 
        try 
            if (StringUtils.isEmpty(date)) 
                return null;
            
            Date date1 = new SimpleDateFormat("EEE MMM dd HH:mm:ss Z yyyy", Locale.ENGLISH).parse(date);
            //格式化
            SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_YYYY_MM_DD_HH_MM_SS);
            return sdf.format(date1);
         catch (Exception e) 
            e.printStackTrace();
        
        return null;
    


    /**
     * 判断当前时间是否在[startTime, endTime]区间，注意时间格式要一致
     *
     * @param nowTime     当前时间
     * @param dateSection 时间区间   2018-01-08,2019-09-09
     * @return
     */
    public static boolean isEffectiveDate(Date nowTime, String dateSection) 
        try 
            String[] times = dateSection.split(",");
            String format = "yyyy-MM-dd";
            Date startTime = new SimpleDateFormat(format).parse(times[0]);
            Date endTime = new SimpleDateFormat(format).parse(times[1]);
            if (nowTime.getTime() == startTime.getTime()
                    || nowTime.getTime() == endTime.getTime()) 
                return true;
            
            Calendar date = Calendar.getInstance();
            date.setTime(nowTime);

            Calendar begin = Calendar.getInstance();
            begin.setTime(startTime);

            Calendar end = Calendar.getInstance();
            end.setTime(endTime);

            if (isSameDay(date, begin) || isSameDay(date, end)) 
                return true;
            
            if (date.after(begin) && date.before(end)) 
                return true;
             else 
                return false;
            
         catch (Exception e) 
            e.printStackTrace();
            return false;
        
    

    /**
     * 判断两个时间是否相同
     *
     * @param cal1
     * @param cal2
     * @return
     */
    public static boolean isSameDay(Calendar cal1, Calendar cal2) 
        if (cal1 != null && cal2 != null) 
            return cal1.get(0) == cal2.get(0) && cal1.get(1) == cal2.get(1) && cal1.get(6) == cal2.get(6);
         else 
            throw new IllegalArgumentException("The date must not be null");
        
    

    /**
     * 字符串转long
     *
     * @param time
     * @return
     */
    public static long stringToLong(String time) 
        SimpleDateFormat format = new SimpleDateFormat(FORMAT_YYYY_MM_DD_HH_MM_SS);
        try 
            Date date = format.parse(time);
            //日期转时间戳（毫秒）
            return date.getTime();
         catch (Exception e) 
            e.printStackTrace();
            return 0;
        
    
	/**
     * Timestamp 转字符串
     * @param timestamp
     * @return
     */
    public static String longToString(Timestamp timestamp , String format)
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        return sdf.format(timestamp);
    

    /**
     * 获取当前小时 ：2019-08-23 17
     *
     * @return 2019-08-27 17
     */
    public static String getCurrentHour() 
        GregorianCalendar calendar = new GregorianCalendar();
        int hour = calendar.get(Calendar.HOUR_OF_DAY);
        if (hour < 10) 
            return DateUtils.getCurrentTime() + " 0" + hour;
        
        return DateUtils.getDateByString() + " " + hour;
    

    /**
     * 获取当前时间一个小时前
     *
     * @return 2019-08-27 16
     */
    public static String getCurrentHourBefore() 
        GregorianCalendar calendar = new GregorianCalendar();
        int hour = calendar.get(Calendar.HOUR_OF_DAY);
        if (hour > 0) 
            hour = calendar.get(Calendar.HOUR_OF_DAY) - 1;
            if (hour < 10) 
                return DateUtils.getDateByString() + " 0" + hour;
            
            return DateUtils.getDateByString() + " " + hour;
        
        //获取当前日期前一天
        return DateUtils.getBeforeDay() + " " + 23;
    

    /**
     * 获取当前日期前一天
     *
     * @return 2019-08-26
     */
    public static String getBeforeDay() 

        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_YYYY_MM_DD);
        Date date = new Date();
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(Calendar.DAY_OF_MONTH, -1);
        date = calendar.getTime();
        return sdf.format(date);
    


    /**
     * 获取最近七天
     *
     * @return 2019-08-20
     */
    public static String getSeven() 
        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_YYYY_MM_DD);

        Calendar c = Calendar.getInstance();

        c.add(Calendar.DATE, -7);

        Date monday = c.getTime();

        String preMonday = sdf.format(monday);

        return preMonday;
    

    /**
     * 获取最近一个月
     *
     * @return 2019-07-27
     */
    public static String getOneMonth() 
        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_YYYY_MM_DD);

        Calendar c = Calendar.getInstance();

        c.add(Calendar.MONTH, -1);

        Date monday = c.getTime();

        String preMonday = sdf.format(monday);

        return preMonday;
    

    /**
     * 获取最近三个月
     *
     * @return 2019-05-27
     */
    public static String getThreeMonth() 
        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_YYYY_MM_DD);

        Calendar c = Calendar.getInstance();

        c.add(Calendar.MONTH, -3);

        Date monday = c.getTime();

        String preMonday = sdf.format(monday);

        return preMonday;
    

    /**
     * 获取最近一年
     *
     * @return 2018-08-27
     */
    public static String getOneYear() 
        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_YYYY_MM_DD);
        Calendar c = Calendar.getInstance();
        c.add(Calendar.YEAR, -1);
        Date start = c.getTime();
        String startDay = sdf.format(start);
        return startDay;
    

    public static void main(String[] args) 
        System.out.println(stringToLong("2021-07-01 00:00:00"));