日期操作utils

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

/**
 * 日期操作辅助类
 *
 **/
public class DateUtil {

    private DateUtil() {
    }

    /** 日期格式 **/
    public interface DATE_PATTERN {

        String HHMMSS = "HHmmss";
        String HH_MM_SS = "HH:mm:ss";
        String YYYYMMDD = "yyyyMMdd";
        String YYYY_MM_DD = "yyyy-MM-dd";
        String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";
        String YYYYMMDDHHMMSSSSS = "yyyyMMddHHmmssSSS";
        String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
        String MMDD = "MM月dd日";
    }

    /**
     * 格式化日期
     *
     * @param date
     * @return
     */
    public static final String format(Object date) {
        return format(date, DATE_PATTERN.YYYY_MM_DD);
    }

    /**
     * 格式化日期
     *
     * @param date
     * @param pattern
     * @return
     */
    public static final String format(Object date, String pattern) {
        if (date == null) {
            return null;
        }
        if (pattern == null) {
            return format(date);
        }
        return new SimpleDateFormat(pattern).format(date);
    }

    /**
     * 获取日期
     *
     * @return
     */
    public static final String getDate() {
        return format(new Date());
    }

    /**
     * 获取日期时间
     *
     * @return
     */
    public static final String getDateTime() {
        return format(new Date(), DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
    }

    /**
     * 获取日期时间
     *
     * @return
     */
    public static final String getDateTimeSs() {
        return format(new Date(), DATE_PATTERN.YYYYMMDDHHMMSSSSS);
    }
    /**
     * 获取日期
     *
     * @param pattern
     * @return
     */
    public static final String getDateTime(String pattern) {
        return format(new Date(), pattern);
    }

    /**
     * 日期计算
     *
     * @param date
     * @param field
     * @param amount
     * @return
     */
    public static final Date addDate(Date date, int field, int amount) {
        if (date == null) {
            return null;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(field, amount);
        return calendar.getTime();
    }

    /**
     * 字符串转换为日期:不支持yyM[M]d[d]格式
     *
     * @param date
     * @return
     */
    public static final Date stringToDate(String date) {
        if (date == null) {
            return null;
        }
        String separator = String.valueOf(date.charAt(4));
        String pattern = "yyyyMMdd";
        if (!separator.matches("\\d*")) {
            pattern = "yyyy" + separator + "MM" + separator + "dd";
            if (date.length() < 10) {
                pattern = "yyyy" + separator + "M" + separator + "d";
            }
        } else if (date.length() < 8) {
            pattern = "yyyyMd";
        }
        pattern += " HH:mm:ss.SSS";
        pattern = pattern.substring(0, Math.min(pattern.length(), date.length()));
        try {
            return new SimpleDateFormat(pattern).parse(date);
        } catch (ParseException e) {
            return null;
        }
    }

    /**
     * 间隔天数
     *
     * @param startDate
     * @param endDate
     * @return
     */
    public static final Integer getDayBetween(Date startDate, Date endDate) {
        Calendar start = Calendar.getInstance();
        start.setTime(startDate);
        start.set(Calendar.HOUR_OF_DAY, 0);
        start.set(Calendar.MINUTE, 0);
        start.set(Calendar.SECOND, 0);
        start.set(Calendar.MILLISECOND, 0);
        Calendar end = Calendar.getInstance();
        end.setTime(endDate);
        end.set(Calendar.HOUR_OF_DAY, 0);
        end.set(Calendar.MINUTE, 0);
        end.set(Calendar.SECOND, 0);
        end.set(Calendar.MILLISECOND, 0);

        long n = end.getTimeInMillis() - start.getTimeInMillis();
        return (int) (n / (60 * 60 * 24 * 1000L));
    }

    /**
     * 间隔月
     *
     * @param startDate
     * @param endDate
     * @return
     */
    public static final Integer getMonthBetween(Date startDate, Date endDate) {
        if (startDate == null || endDate == null || !startDate.before(endDate)) {
            return null;
        }
        Calendar start = Calendar.getInstance();
        start.setTime(startDate);
        Calendar end = Calendar.getInstance();
        end.setTime(endDate);
        int year1 = start.get(Calendar.YEAR);
        int year2 = end.get(Calendar.YEAR);
        int month1 = start.get(Calendar.MONTH);
        int month2 = end.get(Calendar.MONTH);
        int n = (year2 - year1) * 12;
        n = n + month2 - month1;
        return n;
    }

    /**
     * 间隔月，多一天就多算一个月
     *
     * @param startDate
     * @param endDate
     * @return
     */
    public static final Integer getMonthBetweenWithDay(Date startDate, Date endDate) {
        if (startDate == null || endDate == null || !startDate.before(endDate)) {
            return null;
        }
        Calendar start = Calendar.getInstance();
        start.setTime(startDate);
        Calendar end = Calendar.getInstance();
        end.setTime(endDate);
        int year1 = start.get(Calendar.YEAR);
        int year2 = end.get(Calendar.YEAR);
        int month1 = start.get(Calendar.MONTH);
        int month2 = end.get(Calendar.MONTH);
        int n = (year2 - year1) * 12;
        n = n + month2 - month1;
        int day1 = start.get(Calendar.DAY_OF_MONTH);
        int day2 = end.get(Calendar.DAY_OF_MONTH);
        if (day1 <= day2) {
            n++;
        }
        return n;
    }

    /**
     * date转成字符串
     * 
     * @param date
     * @param format
     * @return
     */
    public static String dateToString(Date date, String format) {
        String mDate = "";
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        try {
            mDate = sdf.format(date);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return mDate;
    }

    /**
     * 日期转换成日期
     * @param date
     * @param format
     * @return
     */
    public static Date dateToDate(Date date, String format) {
        Date tDate = null;
        String mDate = "";
        try {
            SimpleDateFormat sdf = new SimpleDateFormat(format);
            mDate = sdf.format(date);
            tDate = sdf.parse(mDate);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return tDate;
    }

    

    /**
     * 取得当前月份总的天数
     * 
     */
    public static int getCurrentMonthLastDay() {
        Calendar a = Calendar.getInstance();
        a.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        a.roll(Calendar.DATE, -1);// 日期回滚一天，也就是最后一天
        int maxDate = a.get(Calendar.DATE);
        return maxDate;
    }

    /**
     * 得到上个月第一天时间
     * 
     * @return Zf 2018年4月2日 上午11:42:47
     */
    public static Date getLastMonthFirstDay() {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.MONTH, -1);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        return calendar.getTime();
    }

    /**
     * 得到上个月最后一天时间
     * 
     */
    public static Date getLastMonthEndDay() {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, -1);
        return calendar.getTime();
    }

    /**
     * 获取这个月第一天时间
     * 
     */
    public static Date getThisMonthFirstDay() {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        return calendar.getTime();
    }
    /**
     * yyyy-MM-dd HH:mm:ss格式的字符串转时间
     * 
     * @return
     */
    public static final Date getStringtoDate(String date) {
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
        try {
            return sdf.parse(date);
        } catch (ParseException e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 时间转成yyyy-MM-dd HH:mm:ss格式的字符串
     * 
     * @param date
     * @return
     */
    public static final String getDatetoString(Date date) {
        return dateToString(date, DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
    }

    /**
     * 日期比较
     * 
     * @param dt1 
     * @param dt2
     * @return 1：dt1 在dt2前 -1：dt1在dt2后 0：dt1等于dt2
     */
    public static int compare_date(Date dt1, Date dt2 ) {
        try {
            if (dt1.getTime() > dt2.getTime()) {
                return 1;
            } else if (dt1.getTime() < dt2.getTime()) {
                return -1;
            } else {
                return 0;
            }
        } catch (Exception exception) {
            exception.printStackTrace();
        }
        return 0;
    }

    /**
     * 判断时间是否在时间段内
     * @param date    需要判断的时间
     * @param begin    开始时间
     * @param end    结束时间
     * @return
     */
    public static boolean isInDate(Date date, Date begin, Date end) {
        return (date.getTime()>=begin.getTime())&&(date.getTime()<=end.getTime());
    }

    
    
    /**
     * 
     * 获取当天0点时间或者24点时间
     * @param month 0,24
     * @return int
     **/
    public static String getTimeSmorningOrSnight(int month){    
        Calendar cal = Calendar.getInstance();   
        cal.set(Calendar.HOUR_OF_DAY, month);   
        cal.set(Calendar.SECOND, 0);   
        cal.set(Calendar.MINUTE, 0);   
        cal.set(Calendar.MILLISECOND, 0); 
        return format(cal.getTime(),DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
        
    }

    /**
     *
     * 获取当天0点时间或者24点时间
     * @param month 0,24
     * @return int
     */
    public static Date getTimeSmorningOrSnightDate(int month){
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, month);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.MILLISECOND, 0);
        return getStringtoDate(format(cal.getTime(),DATE_PATTERN.YYYY_MM_DD_HH_MM_SS));

    }
    /**
     * 
     * 获取指定日期前几个小时的时间
     * @param hour
     * @return String
     */
    public static String beforeOneHourToNowDate(Date tDate,int hour) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(tDate);
        calendar.set(Calendar.HOUR_OF_DAY, calendar.get(Calendar.HOUR_OF_DAY) - hour);
        return  format(calendar.getTime(),DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
    }

    /**
     *
     * 获取指定日期后几个小时的时间
     * @param hour
     * @return String
     */
    public static String afterOneHourToNowDate(Date tDate,int hour) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(tDate);
        calendar.set(Calendar.HOUR_OF_DAY, calendar.get(Calendar.HOUR_OF_DAY) + hour);
        return  format(calendar.getTime(),DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
    }
    /**
     * 根据录入日期为标准，返回为时间增加（减少）相应秒数后的时间
     * @param date 录入日期
     * @param nSeconds 增加(减少)秒数
     * @return 增加（减少相应）秒数后的日期
     */
    public static String getDateBySeconds(Date date,int nSeconds) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(Calendar.SECOND, calendar.get(Calendar.SECOND) + nSeconds);
        return  format(calendar.getTime(),DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
    } 
    /**
     * 以当前时间为标准，得到指定的时间戳
     * @param orderDay 指定的天数,可以为负数代表前几天
     * @return
     */
    public static Long getOrderDateTime(int orderDay){
        return getOrderDateTime(orderDay,new Date()).getTime();
    }
    /**
     * 取得与原日期相差一定天数的日期，返回Date型日期
     *
     * @param date
     *            原日期
     * @param intBetween
     *            相差的天数
     * @return date加上intBetween天后的日期
     */
    public static Date getDateBetween(Date date, int intBetween) {
        return getOrderDateTime(intBetween,date);
    }
    /**
     * 以当前时间为标准，得到指定的时间戳
     * @param orderDay 指定的天数,可以为负数代表前几天
     * @param orderDate 指定初始时间
     * @return
     */
    public static Date getOrderDateTime(int orderDay,Date orderDate){
         Calendar calendar = Calendar.getInstance();  
        calendar.setTime(orderDate);  
        calendar.add(Calendar.DAY_OF_MONTH, orderDay);  
        return calendar.getTime();
    }
    
    /**
     * 时间处理 要获取前后几分钟的时间
     * @date:2018年4月18日上午11:33:22
     * @param date
     * @return
     */
    public static Date getWhatMin(Date date,int min) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(Calendar.MINUTE,min);
        date = calendar.getTime();
        return date;
    }
    /**
     * 上个月的今天
     * 
     * @param format
     * @return
     */
    public static String getLastMonthToDay(String format) {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.MONTH, -1);
        if (null == format || "".equals(format)) {
            format = DATE_PATTERN.YYYY_MM_DD;
        }
        return dateToString(calendar.getTime(), format);
    }
    
    /**
     * 
     * 范围指定时间 前几天 某个小时的时间
     * @param date 指定时间
     * @param day  往前推几天
     * @param month 小时 0-24
     * @return Date
     */
    public static String returnPre(Date date, int day,int month) {
        Calendar calendar = new GregorianCalendar();
        calendar.setTime(date);
        calendar.set(Calendar.HOUR_OF_DAY, month);  
        calendar.set(Calendar.SECOND, 0);   
        calendar.set(Calendar.MINUTE, 0);   
        calendar.set(Calendar.MILLISECOND, 0); 
        calendar.add(Calendar.DATE, day);
        return format(calendar.getTime(),"yyyy-MM-dd HH:mm:ss");
    }

    public static void main(String[] args) {
        /*Date date = new Date();
        System.out.println(format(DateUtil.getOrderDateTime(-7, date), "yyyy-MM-dd HH:mm:ss"));

        System.out.println(returnPre(new Date(),-6,0));
        System.out.println(format(stringToDate(returnPre(new Date(),-6,0)), "MM-dd"));
        for (int i = -30; i <= 0; i=i+2) {
            System.out.println(returnPre(new Date(),i,0));
        }*/
        String date = "1574837075000";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String string = sdf.format(Long.valueOf(date));
        System.out.println(string);
    }

    /**
     * 时间类型相互转换
     * @param date
     * @param oldFormat
     * @param newFormat
     * @param dayNumber
     * @return
     */
    public static String dateFomat_String(String date,String oldFormat,String newFormat,int dayNumber){
        String resultDataString = "";
        try {
            SimpleDateFormat sdf = new SimpleDateFormat(oldFormat);
            SimpleDateFormat sdfNew = new SimpleDateFormat(newFormat);
            Calendar theCa = Calendar.getInstance();
            Date startDate = null;
            if (date != null && !"".equals(date)){
                startDate = sdf.parse(date);
            }else {
                return "传入时间String不能为null";
            }
            if (dayNumber>0){
                theCa.setTime(startDate);
                theCa.add(theCa.DATE, -dayNumber);//dayNumber:往前多少天
                Date start = theCa.getTime();
                resultDataString = sdfNew.format(start);
            }else {
                resultDataString = sdfNew.format(startDate);
            }
        }catch (Exception e){
            e.printStackTrace();
        }
        return resultDataString;
    }

    /**
     * 时间类型相互转换
     * @param date
     * @param format
     * @param dayNumber
     * @return
     */
    public static String dateFomat_Date(Date date,String format,int dayNumber){
        String resultDataString = "";
        try {
            SimpleDateFormat sdf = new SimpleDateFormat(format);
            Calendar theCa = Calendar.getInstance();
            Date startDate = null;
            if (date != null){
                if (dayNumber>0){
                    theCa.setTime(startDate);
                    theCa.add(theCa.DATE, -dayNumber);//dayNumber:往前多少天
                    Date start = theCa.getTime();
                    resultDataString = sdf.format(start);
                }else {
                    resultDataString = sdf.format(startDate);
                }
            }else {
                return "传入时间Date不能为null";
            }
        }catch (Exception e){
            e.printStackTrace();
        }
        return resultDataString;
    }

    /**
     * 时间转换为长整型
     * @param date
     * @param format
     * @return
     */
    public static Long dateFomat_Long(String date,String format){
        try {
            SimpleDateFormat sf = new SimpleDateFormat(format);
            return sf.parse(date).getTime();
        }catch (Exception e){
            e.printStackTrace();
        }
        return 0L;
    }
    
    /**
     * 把yyyy-MM-dd HH:mm:ss格式的字符串 转 IOS8601格式yyyy-MM-dd‘T‘HH:mm:ss.SSSzzz格式的字符串
     * @param date
     * @return
     */
    public static String strDateToAsISO(String date){
        Date stringtoDate = getStringtoDate(date);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd‘T‘HH:mm:ss.SSSzzz");
        String s = sdf.format(stringtoDate);
        return s;
    }

}