日期工具类

package com.yashi.common.utils;

import lombok.extern.slf4j.Slf4j;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.YearMonth;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import java.util.Date;

/**
 * @Auther: 
 * @Date: 11:52 2018-10-22
 * @Description: 时间处理工具，生成到目前的毫秒
 * @Version: 1.0
 */
@Slf4j
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
    private static final long ONE_MINUTE = 60;
    private static final long ONE_HOUR = 3600;
    private static final long ONE_DAY = 86400;
    private static final long ONE_MONTH = 2592000;
    private static final long ONE_YEAR = 31104000;

    public static final String SEARCH_DATE_DAY = "today"; //今天
    public static final String SEARCH_DATE_YESTERDAY = "yesterday"; //昨天
    public static final String SEARCH_DATE_LATELY_7 = "lately7"; //最近7天
    public static final String SEARCH_DATE_LATELY_30 = "lately30"; //最近30天
    public static final String SEARCH_DATE_LATELY_365 = "lately365";//最近一年
    public static final String SEARCH_DATE_WEEK = "week"; //本周
    public static final String SEARCH_DATE_PRE_WEEK = "preWeek"; //上周
    public static final String SEARCH_DATE_MONTH = "month"; //本月
    public static final String SEARCH_DATE_PRE_MONTH = "preMonth"; //上月
    public static final String SEARCH_DATE_YEAR = "year"; //年
    public static final String SEARCH_DATE_PRE_YEAR = "preYear"; //上一年

    public static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
    public static final String DATE_FORMAT_DATE = "yyyy-MM-dd";
    public static final String DATE_FORMAT_START = "yyyy-MM-dd 00:00:00";
    public static final String DATE_FORMAT_END = "yyyy-MM-dd 23:59:59";
    public static final String DATE_FORMAT_MONTH_START = "yyyy-MM-01 00:00:00";
    public static final String DATE_FORMAT_YEAR_START = "yyyy-01-01 00:00:00";
    public static final String DATE_FORMAT_YEAR_END = "yyyy-12-31 23:59:59";


    public static final String yyyyMMdd = "yyyyMMdd";

    public static final String yyyy_MM_dd = "yyyy-MM-dd";

    public static final String yyyy_MM = "yyyy-MM";

    public static final String yyyyYearMMMonthddDay = "yyyy年MM月dd日";

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

    /**
     * 获取当前日期,指定格式
     * 描述:<描述函数实现的功能>.
     *
     * @return
     */
    public static Date nowDateTime() {
        return strToDate(nowDateTimeStr(), "yyyy-MM-dd HH:mm:ss");
    }
    /**
     * parse a String to Date in a specifies fromat.
     *
     * @param dateStr
     * @param DATE_FORMAT
     * @return
     * @throws ParseException
     */
    public static Date strToDate(String dateStr, String DATE_FORMAT) {
        SimpleDateFormat myFormat = new SimpleDateFormat(DATE_FORMAT);
        try {
            return myFormat.parse(dateStr);
        } catch (ParseException e) {
            return null;
        }
    }
    /**
     * 获取当前日期,指定格式
     * 描述:<描述函数实现的功能>.
     *
     * @return
     */
    public static String nowDateTimeStr() {
        return nowDate("yyyy-MM-dd HH:mm:ss");
    }
    /**
     * 获取当前日期,指定格式
     * 描述:<描述函数实现的功能>.
     *
     * @return
     */
    public static String nowDate(String DATE_FORMAT) {
        SimpleDateFormat dft = new SimpleDateFormat(DATE_FORMAT);
        return dft.format(new Date());
    }

    /**
     * 格式化时间
     *
     * @param date
     * @param format
     * @return
     */
    public static String format(Date date, String format) {
        SimpleDateFormat simple = new SimpleDateFormat(format);
        return simple.format(date);
    }

    /**
     * 获取当前时间前的分钟时间
     *
     * @param miunte
     * @return
     */
    public static String getPastMinute(int miunte) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.MINUTE, calendar.get(Calendar.MINUTE) - miunte);
        Date time = calendar.getTime();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String result = format.format(time);
        return result;
    }

    /**
     * 获取过去第几天的时间(String)
     *
     * @param past
     * @return
     */
    public static String getPastDate(int past) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) - past);
        Date today = calendar.getTime();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String result = format.format(today);
        return result;
    }

    /**
     * 获取过去第几天的时间(Date)
     *
     * @param past
     * @return
     */
    public static Date getPastDateTime(int past) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) - past);
        Date day = calendar.getTime();
        return day;
    }

    /**
     * 获取以后第几天的时间
     *
     * @param later
     * @return
     */
    public static Date getLaterDate(int later) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) + later);
        return calendar.getTime();
    }

    /**
     * 获取以后第几天的时间
     *
     * @param later
     * @return
     */
    public static String getLaterDateTime(int later) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) + later);
        Date day = calendar.getTime();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String result = format.format(day);
        return result;
    }

    /**
     * @return yyyy-mm-dd
     * 2012-12-25
     */
    public static String getDate() {
        return getYear() + "-" + getMonth() + "-" + getDay();
    }

    /**
     * @param format
     * @return yyyy年MM月dd HH:mm
     * MM-dd HH:mm 2012-12-25
     */
    public static String getDate(String format) {
        SimpleDateFormat simple = new SimpleDateFormat(format);
        return simple.format(Calendar.getInstance().getTime());
    }

    /**
     * @return yyyy-MM-dd HH:mm
     * 2012-12-29 23:47
     */
    public static String getDateAndMinute() {
        SimpleDateFormat simple = new SimpleDateFormat("yyyy-MM-dd HH:mm");
        return simple.format(Calendar.getInstance().getTime());
    }

    /**
     * @return yyyy-MM-dd HH:mm:ss
     * 2012-12-29 23:47:36
     */
    public static String getFullDate() {
        SimpleDateFormat simple = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return simple.format(Calendar.getInstance().getTime());
    }

    /**
     * 距离今天多久
     *
     * @param date
     * @return
     */
    public static String fromToday(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);

        long time = date.getTime() / 1000;
        long now = System.currentTimeMillis() / 1000;
        long ago = now - time;
        if (ago <= ONE_HOUR) {
            return ago / ONE_MINUTE + "分钟前";
        } else if (ago <= ONE_DAY) {
            return ago / ONE_HOUR + "小时" + (ago % ONE_HOUR / ONE_MINUTE)
                    + "分钟前";
        } else if (ago <= ONE_DAY * 2) {
            return "昨天" + calendar.get(Calendar.HOUR_OF_DAY) + "点"
                    + calendar.get(Calendar.MINUTE) + "分";
        } else if (ago <= ONE_DAY * 3) {
            return "前天" + calendar.get(Calendar.HOUR_OF_DAY) + "点"
                    + calendar.get(Calendar.MINUTE) + "分";
        } else if (ago <= ONE_MONTH) {
            long day = ago / ONE_DAY;
            return day + "天前" + calendar.get(Calendar.HOUR_OF_DAY) + "点"
                    + calendar.get(Calendar.MINUTE) + "分";
        } else if (ago <= ONE_YEAR) {
            long month = ago / ONE_MONTH;
            long day = ago % ONE_MONTH / ONE_DAY;
            return month + "个月" + day + "天前"
                    + calendar.get(Calendar.HOUR_OF_DAY) + "点"
                    + calendar.get(Calendar.MINUTE) + "分";
        } else {
            long year = ago / ONE_YEAR;
            int month = calendar.get(Calendar.MONTH) + 1;// JANUARY which is 0 so month+1
            return year + "年前" + month + "月" + calendar.get(Calendar.DATE)
                    + "日";
        }

    }

    /**
     * 距离截止日期还有多长时间
     *
     * @param date
     * @return
     */
    public static String fromDeadline(Date date) {
        long deadline = date.getTime() / 1000;
        long now = (System.currentTimeMillis()) / 1000;
        long remain = deadline - now;
        if (remain <= ONE_HOUR) {
            return "只剩下" + remain / ONE_MINUTE + "分钟";
        } else if (remain <= ONE_DAY) {
            return "只剩下" + remain / ONE_HOUR + "小时"
                    + (remain % ONE_HOUR / ONE_MINUTE) + "分钟";
        } else {
            long day = remain / ONE_DAY;
            long hour = remain % ONE_DAY / ONE_HOUR;
            long minute = remain % ONE_DAY % ONE_HOUR / ONE_MINUTE;
            return "只剩下" + day + "天" + hour + "小时" + minute + "分钟";
        }

    }

    /**
     * 距离今天的绝对时间
     *
     * @param date
     * @return
     */
    public static String toToday(Date date) {
        long time = date.getTime() / 1000;
        long now = (System.currentTimeMillis()) / 1000;
        long ago = now - time;
        if (ago <= ONE_HOUR) {
            return ago / ONE_MINUTE + "分钟";
        } else if (ago <= ONE_DAY) {
            return ago / ONE_HOUR + "小时" + (ago % ONE_HOUR / ONE_MINUTE) + "分钟";
        } else if (ago <= ONE_DAY * 2) {
            return "昨天" + (ago - ONE_DAY) / ONE_HOUR + "点" + (ago - ONE_DAY)
                    % ONE_HOUR / ONE_MINUTE + "分";
        } else if (ago <= ONE_DAY * 3) {
            long hour = ago - ONE_DAY * 2;
            return "前天" + hour / ONE_HOUR + "点" + hour % ONE_HOUR / ONE_MINUTE
                    + "分";
        } else if (ago <= ONE_MONTH) {
            long day = ago / ONE_DAY;
            long hour = ago % ONE_DAY / ONE_HOUR;
            long minute = ago % ONE_DAY % ONE_HOUR / ONE_MINUTE;
            return day + "天前" + hour + "点" + minute + "分";
        } else if (ago <= ONE_YEAR) {
            long month = ago / ONE_MONTH;
            long day = ago % ONE_MONTH / ONE_DAY;
            long hour = ago % ONE_MONTH % ONE_DAY / ONE_HOUR;
            long minute = ago % ONE_MONTH % ONE_DAY % ONE_HOUR / ONE_MINUTE;
            return month + "个月" + day + "天" + hour + "点" + minute + "分前";
        } else {
            long year = ago / ONE_YEAR;
            long month = ago % ONE_YEAR / ONE_MONTH;
            long day = ago % ONE_YEAR % ONE_MONTH / ONE_DAY;
            return year + "年前" + month + "月" + day + "天";
        }

    }

    public static int getIntYear() {
        return Calendar.getInstance().get(Calendar.YEAR);
    }

    public static int getIntMonth() {
        return Calendar.getInstance().get(Calendar.MONTH);
    }

    public static String getYear() {
        return Calendar.getInstance().get(Calendar.YEAR) + "";
    }

    public static String getMonth() {
        int month = Calendar.getInstance().get(Calendar.MONTH) + 1;
        return month + "";
    }

    public static String getDay() {
        return Calendar.getInstance().get(Calendar.DATE) + "";
    }

    public static String get24Hour() {
        return Calendar.getInstance().get(Calendar.HOUR_OF_DAY) + "";
    }

    public static String getMinute() {
        return Calendar.getInstance().get(Calendar.MINUTE) + "";
    }

    public static String getSecond() {
        return Calendar.getInstance().get(Calendar.SECOND) + "";
    }

    /**
     * 获取当前天开始时间
     *
     * @param date yyyy-MM-dd
     * @return
     */
    public static String getBeginDay(Date date) {
        String format = format(date, "yyyy-MM-dd");
        return format + " 00:00:00";
    }

    /**
     * 获取当前天最后时间
     *
     * @param date yyyy-MM-dd
     * @return
     */
    public static String getEndDay(Date date) {
        String format = format(date, "yyyy-MM-dd");
        return format + " 23:59:59";
    }

    /**
     * 获取当前天开始时间
     *
     * @param date yyyy-MM-dd
     * @return
     */
    public static String getBeginDay(String date) {
        checkDay(date);
        return date + " 00:00:00";
    }

    /**
     * 获取当前天最后时间
     *
     * @param date yyyy-MM-dd
     * @return
     */
    public static String getEndDay(String date) {
        checkDay(date);
        return date + " 23:59:59";
    }

    /**
     * 获取当前月开始时间
     *
     * @param date yyyy-MM
     * @return
     */
    public static String getBeginMonth(String date) {
        checkMonth(date);
        String[] split = date.split("-");
        int year = Integer.parseInt(split[0]);
        int month = Integer.parseInt(split[1]);

        YearMonth yearMonth = YearMonth.of(year, month);
        LocalDate localDate = yearMonth.atDay(1);
        LocalDateTime startOfDay = localDate.atStartOfDay();
        ZonedDateTime zonedDateTime = startOfDay.atZone(ZoneId.of("Asia/Shanghai"));
        return format(Date.from(zonedDateTime.toInstant()), "yyyy-MM-dd HH:mm:ss");
    }

    /**
     * 获取当前月开始时间
     *
     * @param date yyyy-MM
     * @return
     */
    public static String getBeginMonth(Date date) {
        SimpleDateFormat simple = new SimpleDateFormat("yyyy-MM");
        String formatDate = simple.format(date);
        return getBeginMonth(formatDate);
    }

    /**
     * 获取当前月结束时间
     *
     * @param date yyyy-MM
     * @return
     */
    public static String getEndMonth(String date) {
        checkMonth(date);
        String[] split = date.split("-");
        int year = Integer.parseInt(split[0]);
        int month = Integer.parseInt(split[1]);

        YearMonth yearMonth = YearMonth.of(year, month);
        LocalDate endOfMonth = yearMonth.atEndOfMonth();
        LocalDateTime localDateTime = endOfMonth.atTime(23, 59, 59, 999);
        ZonedDateTime zonedDateTime = localDateTime.atZone(ZoneId.of("Asia/Shanghai"));
        return format(Date.from(zonedDateTime.toInstant()), "yyyy-MM-dd HH:mm:ss");
    }

    /**
     * 获取当前月结束时间
     *
     * @param date yyyy-MM
     * @return
     */
    public static String getEndMonth(Date date) {
        SimpleDateFormat simple = new SimpleDateFormat("yyyy-MM");
        String formatDate = simple.format(date);
        return getEndMonth(formatDate);
    }


    /**
     * 获取当前年开始时间
     *
     * @param date yyyy
     * @return
     */
    public static String getBeginYear(String date) {
        checkYear(date);
        checkYear(date);
        return date + "-01-01 00:00:00";
    }

    /**
     * 获取当前年开始时间
     *
     * @param date yyyy
     * @return
     */
    public static String getEedYear(String date) {
        checkYear(date);
        return date + "-12-31 23:59:59";
    }


//    public static void main(String[] args) {
//        String day = "2000-2-29";
//        String month = "2001-2";
//        String year = "22000";
//        System.out.println(DateUtil.getBeginDay(day));
//        System.out.println(DateUtil.getEndDay(day));
//
//        System.out.println("========================================");
//
//        System.out.println(DateUtil.getBeginDay(new Date()));
//        System.out.println(DateUtil.getEndDay(new Date()));
//
//        System.out.println("========================================");
//        System.out.println(DateUtil.getBeginMonth(month));
//        System.out.println(DateUtil.getEndMonth(month));
//
//        System.out.println("========================================");
//        System.out.println(DateUtil.getBeginYear(year));
//        System.out.println(DateUtil.getEenYear(year));
//    }

    /**
     * 检查日
     *
     * @param day
     */
    public static void checkDay(String day) {
        SimpleDateFormat simple = new SimpleDateFormat("yyyy-MM-dd");
        try {
            simple.setLenient(false);
            simple.parse(day);
        } catch (ParseException e) {
            throw new RuntimeException("日期格式错误", e);
        }
    }

    /**
     * 检查月
     *
     * @param month
     */
    public static void checkMonth(String month) {
        SimpleDateFormat simple = new SimpleDateFormat("yyyy-MM");
        try {
            simple.setLenient(false);
            simple.parse(month);
        } catch (ParseException e) {
            throw new RuntimeException("日期格式错误", e);
        }
    }

    /**
     * 检查年
     *
     * @param year
     */
    public static void checkYear(String year) {
        int yearInt = Integer.parseInt(year);
        if (yearInt > 3000 || yearInt < 1000) {
            throw new RuntimeException("日期格式错误");
        }
    }

    /**
     * 将yyyyMMddHHmmss  格式的时间字符串转为时间
     *
     * @param str
     */
    public static Date dateStrToDate(String str) {
        DateTimeFormatter f = DateTimeFormatter.ofPattern("yyyyMMddHHmmss");
        LocalDateTime localDateTime = LocalDateTime.parse(str, f);
        Date date = Date.from(localDateTime.minusDays(7).toInstant(ZoneOffset.ofHours(8)));
        return date;
    }

    //string转date
    public static void stringToDate(){
        try{
            String str="2016-10-24 21:59:06";
            SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            System.out.println(sdf.parse(str));
            System.out.println(sdf.parse(str).getTime());
        }catch(Exception e){
            e.printStackTrace();
        }
    }


    /**
     * String转化Date格式
     * @param date
     * @param type
     * @return
     */
    public static Date parse(String date,String type){
        SimpleDateFormat formatter = new SimpleDateFormat(type);
        ParsePosition pos = new ParsePosition(0);
        Date strtodate = formatter.parse(date, pos);
        return strtodate;

    }

    public static Date getNow() {
        Calendar cal = Calendar.getInstance();
        Date currDate = cal.getTime();
        return currDate;
    }
//
//    public static Date addDays(Date date, Integer days) {
//        Calendar calendar=Calendar.getInstance();
//        calendar.setTime(date);
//        calendar.add(Calendar.DATE, days);
//        return calendar.getTime();
//    }
//
//    public static Date addMonth(Date date, Integer month) {
//        Calendar calendar=Calendar.getInstance();
//        calendar.setTime(date);
//        calendar.add(Calendar.MONTH, month);
//        return calendar.getTime();
//    }

    /**
     * 时间格式处理
     * @param date
     * @param f
     * @return
     */
    public static String dateStr(Date date, String f) {
        if (date == null) {
           return "";
         }
         SimpleDateFormat format = new SimpleDateFormat(f);
         String str = format.format(date);
         return str;
    }

    /**
     * 计算时间差,单位分
     * @param date1
     * @param date2
     * @return
     */
    public static int minuteBetween(Date date1, Date date2){
        DateFormat sdf=new SimpleDateFormat(yyyy_MM_dd_HH_mm_ss);
        Calendar cal = Calendar.getInstance();
        try {
            Date d1 = sdf.parse(DateUtils.dateStr(date1,yyyy_MM_dd_HH_mm_ss));
            Date d2 = sdf.parse(DateUtils.dateStr(date2,yyyy_MM_dd_HH_mm_ss));
            cal.setTime(d1);
            long time1 = cal.getTimeInMillis();
            cal.setTime(d2);
            long time2 = cal.getTimeInMillis();
            return Integer.parseInt(String.valueOf((time2 - time1) / 60000));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return 0;
    }

    /**
     * 获取指定时间天的开始时间
     *
     * @param date
     * @return
     */
    public static Date getDayStartTime(Date date) {
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(date.getTime());
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH),
                cal.get(Calendar.DATE), 0, 0, 0);
        return cal.getTime();
    }

    /**
     * 天数差
     * @param date1
     * @param date2
     * @return
     */
    public static int dayBetween(Date date1, Date date2){
        DateFormat sdf=new SimpleDateFormat(yyyy_MM_dd_HH_mm_ss);
        Calendar cal = Calendar.getInstance();
        try {
            Date d1 = sdf.parse(DateUtils.dateStr(date1,yyyy_MM_dd_HH_mm_ss));
            Date d2 = sdf.parse(DateUtils.dateStr(date2,yyyy_MM_dd_HH_mm_ss));
            cal.setTime(d1);
            long time1 = cal.getTimeInMillis();
            cal.setTime(d2);
            long time2 = cal.getTimeInMillis();
            return Integer.parseInt(String.valueOf((time2 - time1) / (24 * 60 * 60000)));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return 0;
    }


    /**
     * 处理时间
     * @param date
     * @param now
     * @return
     */
    public static String getJyTime(Date date,Date now) {
        if(date == null){
            return "";
        }
        int m = minuteBetween(date,now);
        Date dateStart = getDayStartTime(date);
        Date nowStart = getDayStartTime(now);
        int day = dayBetween(dateStart,nowStart);
        if(m < 10){
            return "刚刚";
        }else if (m < 60){
            return m +"分钟前";
        }else if (day == 0){
            return "今天";
        }else if (day == 1){
            return "昨天";
        }else if (day <= 30){
            return day+"天前";
        }else if (date.getYear() == now.getYear()){
            SimpleDateFormat formatter = new SimpleDateFormat("MM-dd");
            String dateString = formatter.format(date);
            return dateString;
        }else{
            SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
            String dateString = formatter.format(date);
            return dateString;
        }
    }

    public static int getTimeMonth(Date date) {
        if (date == null) {
            date = new Date();
        }

        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        return cal.get(2) + 1;
    }

    public static int getTimeDay(Date date) {
        if (date == null) {
            date = new Date();
        }

        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        return cal.get(5);
    }

    public static int getTimeYear(Date date) {
        if (date == null) {
            date = new Date();
        }

        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        return cal.get(1);
    }

    /**
     * 获取当前日期,指定格式
     * 描述:<描述函数实现的功能>.
     *
     * @return
     */
    public static String nowDateTime(String DATE_FORMAT) {
        SimpleDateFormat dft = new SimpleDateFormat(DATE_FORMAT);
        return dft.format(new Date());
    }

    /**
     * 指定日期加上天数后的日期
     *
     * @param num     为增加的天数
     * @param newDate 创建时间
     * @return
     */
    public static final String addDay(String newDate, int num, String pattern) {
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        try {
            Date currdate = format.parse(newDate);
            Calendar ca = Calendar.getInstance();
            ca.setTime(currdate);
            ca.add(Calendar.DATE, num);
            return format.format(ca.getTime());
        } catch (ParseException e) {
            log.error("转化时间出错,", e);
            return null;
        }
    }
    /**
     * 指定日期加上天数后的日期
     *
     * @param num     为增加的天数
     * @param newDate 创建时间
     * @return
     */
    public static final String addDay(Date newDate, int num, String pattern) {
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        Calendar ca = Calendar.getInstance();
        ca.setTime(newDate);
        ca.add(Calendar.DATE, num);
        return format.format(ca.getTime());
    }

    /** 获得本周第一天:yyyy-MM-dd HH:mm:ss */
    public static String getWeekStartDay() {
        Calendar c = Calendar.getInstance();
        c.add(Calendar.WEEK_OF_MONTH, 0);
        c.set(Calendar.DAY_OF_WEEK, 2);
        SimpleDateFormat startSdf = new SimpleDateFormat("yyyy-MM-dd 00:00:00");
        return startSdf.format(c.getTime());
    }
    /** 获得本周最后一天:yyyy-MM-dd HH:mm:ss */
    public static String getWeekEndDay() {
        return addDay(getWeekStartDay(), 7, DATE_FORMAT);
    }

    /** 获得上周第一天:yyyy-MM-dd HH:mm:ss */
    public static String getLastWeekStartDay() {
        return addDay(getWeekStartDay(), -7, DATE_FORMAT);
    }

    /** 获得上周最后一天:yyyy-MM-dd HH:mm:ss */
    public static String getLastWeekEndDay() {
        return addDay(getLastWeekStartDay(), 7, DATE_FORMAT);
    }

    /** 获得本月最后一天:yyyy-MM-dd HH:mm:ss */
    public static String getMonthEndDay() {
        Calendar c = Calendar.getInstance();
        c.set(Calendar.DAY_OF_MONTH, c.getActualMaximum(Calendar.DAY_OF_MONTH));
        SimpleDateFormat endSdf = new SimpleDateFormat("yyyy-MM-dd 23:59:59");
        return endSdf.format(c.getTime());
    }

    /** 获得上月第一天:yyyy-MM-dd HH:mm:ss */
    public static String getLastMonthStartDay() {
        Calendar c = Calendar.getInstance();
        c.add(Calendar.MONTH, -1);
        c.set(Calendar.DAY_OF_MONTH, 1);
        SimpleDateFormat startSdf = new SimpleDateFormat("yyyy-MM-01 00:00:00");
        return startSdf.format(c.getTime());
    }

    /** 获得上月最后一天:yyyy-MM-dd HH:mm:ss */
    public static String getLastMonthEndDay() {
        Calendar c = Calendar.getInstance();
        c.add(Calendar.MONTH, -1);
        c.set(Calendar.DAY_OF_MONTH, c.getActualMaximum(Calendar.DAY_OF_MONTH));
        SimpleDateFormat endSdf = new SimpleDateFormat("yyyy-MM-dd 23:59:59");
        return endSdf.format(c.getTime());
    }

    /** 获得上年第一天:yyyy-MM-dd HH:mm:ss */
    public static String getLastYearStartDay() {
        Calendar c = Calendar.getInstance();
        c.add(Calendar.YEAR, -1);
        SimpleDateFormat startSdf = new SimpleDateFormat("yyyy-01-01 00:00:00");
        return startSdf.format(c.getTime());
    }

    /** 获得上年最后一天:yyyy-MM-dd HH:mm:ss */
    public static String getLastYearEndDay() {
        Calendar c = Calendar.getInstance();
        c.add(Calendar.YEAR, -1);
        SimpleDateFormat endSdf = new SimpleDateFormat("yyyy-12-31 23:59:59");
        return endSdf.format(c.getTime());
    }
    /**
     * 获取指定日期指定格式字符串
     *
     * @param dateStr
     * @param DATE_FORMAT
     * @return
     * @throws ParseException
     */
    public static String appointedDayStrToFormatStr(String dateStr, String STR_DATE_FORMAT, String DATE_FORMAT) {
        Date date = DateUtils.strToDate(dateStr, STR_DATE_FORMAT);
        return DateUtils.dateToStr(date, DATE_FORMAT);
    }
    /**
     * convert a date to string in a specifies fromat.
     *
     * @param date
     * @param DATE_FORMAT
     * @return
     */
    public static String dateToStr(Date date, String DATE_FORMAT) {
        if (date == null) {
            return null;
        }
        SimpleDateFormat myFormat = new SimpleDateFormat(DATE_FORMAT);
        return myFormat.format(date);
    }


    /**
     * 获取当前年,指定格式
     * 描述:<描述函数实现的功能>.
     *
     * @return
     */
    public static String nowYear() {
        Calendar cal = Calendar.getInstance();
        return cal.get(Calendar.YEAR) + "";
    }

    /**
     * 获取上一年,指定格式
     * 描述:<描述函数实现的功能>.
     *
     * @return
     */
    public static String lastYear() {
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.YEAR, -1);
        return cal.get(Calendar.YEAR) + "";
    }

    public static void main(String[] args) {
        stringToDate();
    }
}