DateUtil

比眉伴天荒 2022-07-13 04:40 123阅读 0赞

import java.sql.Timestamp;
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    
    public class DateUtil {
        private static final String dateFormat = "yyyy-MM-dd";
        public static final long oneDay = 86400000L;
    
        public DateUtil() {
        }
    
        public static Date formatToDate(String dateStr, String format) {
            Date date = null;
    
            try {
                if(!StringUtil.isEmpty(dateStr)) {
                    date = (new SimpleDateFormat(format)).parse(dateStr);
                }
            } catch (ParseException var4) {
                var4.printStackTrace();
            }
    
            return date;
        }
    
        public static String formatTimeStampToString(Timestamp date, String format) {
            if(date == null) {
                return "";
            } else {
                SimpleDateFormat df = new SimpleDateFormat(format);
                String str = df.format(date);
                return str;
            }
        }
    
        public static Timestamp getCurrentTimeStampYMD() {
            SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd 00:00:00");
            String time = df.format(new Date());
            Timestamp ts = Timestamp.valueOf(time);
            return ts;
        }
    
        public static Timestamp formatToTimestamp(String date, String format) {
            Timestamp timestamp = null;
    
            try {
                if(date != null && date.length() > 0) {
                    Date e = (new SimpleDateFormat(format)).parse(date);
                    timestamp = new Timestamp(e.getTime());
                }
            } catch (ParseException var4) {
                var4.printStackTrace();
            }
    
            return timestamp;
        }
    
        public static String formatToDayStr(Date date) {
            return formatToStr(date, "yyyy-MM-dd");
        }
    
        public static String formatToStr(Date date, String format) {
            String dateStr = null;
            if(date != null) {
                dateStr = (new SimpleDateFormat(format)).format(date);
            }
    
            return dateStr;
        }
    
        public static String formatToStr(Timestamp date, String format) {
            String dateStr = null;
            if(date != null) {
                dateStr = (new SimpleDateFormat(format)).format(date);
            }
    
            return dateStr;
        }
    
        public static int dateDiff(Date begin, Date end) {
            return (int)((getDayBegin(end).getTime() - getDayBegin(begin).getTime()) / 86400000L);
        }
    
        public static Date getDayBegin(Date day) {
            Calendar c = Calendar.getInstance();
            c.setTimeInMillis(day.getTime());
            c.set(14, 0);
            c.set(13, 0);
            c.set(12, 0);
            c.set(11, 0);
            return c.getTime();
        }
    
        public static long dateDiff(String startTime, String endTime, String format) throws ParseException {
            SimpleDateFormat sd = new SimpleDateFormat(format);
            long nd = 86400000L;
            long nh = 3600000L;
            long nm = 60000L;
            long ns = 1000L;
            long diff = sd.parse(endTime).getTime() - sd.parse(startTime).getTime();
            long day = diff / nd;
            long hour = diff % nd / nh;
            long min = diff % nd % nh / nm;
            long sec = diff % nd % nh % nm / ns;
            System.out.println("时间相差：" + day + "天" + hour + "小时" + min + "分钟" + sec + "秒。");
            return day;
        }
    
        public static String getStrFromDate(Date date) {
            return getStrFormDate(date, "yyyy-MM-dd");
        }
    
        public static String getStrFormDate(Date date, String format) {
            SimpleDateFormat sdf = new SimpleDateFormat(format);
            String str = sdf.format(date);
            return str;
        }
    
        public static Date getSpecifiedDay(Date date, int t) {
            if(date == null) {
                return null;
            } else {
                Calendar c = Calendar.getInstance();
                c.setTime(date);
                c.add(5, t);
                return c.getTime();
            }
        }
    
        public static Date getSpecifiedDayStart(Date date, int t) {
            if(date == null) {
                return null;
            } else {
                Calendar c = Calendar.getInstance();
                c.setTime(date);
                c.add(5, t);
                c.set(11, 0);
                c.set(12, 0);
                c.set(13, 0);
                c.set(14, 0);
                return c.getTime();
            }
        }
    
        public static Date getSpecifiedDayEnd(Date date, int t) {
            if(date == null) {
                return null;
            } else {
                Calendar c = Calendar.getInstance();
                c.setTime(date);
                c.add(5, t);
                c.set(11, 23);
                c.set(12, 29);
                c.set(13, 29);
                c.set(14, 999);
                return c.getTime();
            }
        }
    
        public static void main(String[] args) throws ParseException {
            System.out.println(getSpecifiedDayStart(new Date(), 1));
        }
    }