com.github.fartherp.framework.common.util.DateUtil Maven / Gradle / Ivy
/*
* Copyright (c) 2017. CK. All rights reserved.
*/
package com.github.fartherp.framework.common.util;
import com.github.fartherp.framework.common.constant.Constant;
import org.apache.commons.lang.StringUtils;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* The date tools
* DatUtil
*
* @author CK
*/
public class DateUtil {
public static final String yyyyMMdd = "yyyyMMdd";
public static final String yyyy_MM_dd = "yyyy-MM-dd";
public static final String ddMMyy = "ddMMyy";
public static final String yyyyMM = "yyyyMM";
public static final String yyyy_MM_dd_HH_mm_ss = "yyyy-MM-dd HH:mm:ss";
public static final String yyMMddHHmmss = "yyMMddHHmmss";
public static final String yyyyMMddHH = "yyyyMMddHH";
public static final String yyyyMMddHHmmss = "yyyyMMddHHmmss";
public static final String HH_mm_ss = "HH:mm:ss";
public static final String HHmmss = "HHmmss";
public static final String HH_mm = "HH:mm";
private final static ThreadLocal threadLocal = new ThreadLocal();
/**
* second
*/
public static final long SECOND_TIME = 1000;
/**
* minute
*/
public static final long MINUTE_TIME = SECOND_TIME * 60;
/**
* hour
*/
public static final long HOUR_TIME = MINUTE_TIME * 60;
/**
* day
*/
public static final long DAY_TIME = HOUR_TIME * 24;
public static DateFormat getDateFormat(String format) {
DateFormat df = threadLocal.get();
if (df == null) {
df = new SimpleDateFormat(format);
threadLocal.set(df);
}
return df;
}
/**
* The format {@link Date} to {@code String}.
*
* @param format the specify format
* @param date the date {@link Date}
* @return the new {@code String}
*/
public static String format(String format, Date date) {
return date != null ? getDateFormat(format).format(date) : null;
}
/**
* The parse {@code String} to {@link Date}.
*
* @param format the specify format
* @param date the date {@code String}
* @return the new {@link Date}
*/
public static Date parse(String format, String date) {
if (StringUtils.isBlank(date)) {
return null;
}
Date d = null;
try {
d = getDateFormat(format).parse(date);
} catch (ParseException e) {
// ignore
}
return d;
}
/**
* Get the {@code String} of the specify format through the specify date {@link Date}
* and the specify format {@code String} and the specify date type {@code int} and the specify number {@code int}
*
* @param date the date {@link Date}
* @param format user-defined date format like "yyyy-MM-dd HH:mm:ss"
* @param i the specify date type {@link Calendar}
* @param j the specify number
* @return the date {@code String}
* @see Calendar#YEAR
* @see Calendar#MONTH
* @see Calendar#WEEK_OF_YEAR
* @see Calendar#DATE
* @see Calendar#HOUR
* @see Calendar#MINUTE
* @see Calendar#SECOND
*/
public static String getDateStr(Date date, String format, int i, int j) {
if (date == null) {
return null;
}
Date newDate = getDateByCalendar(date, i, j);
return getDateFormat(format).format(newDate);
}
/**
* whether leap year
*
* @param year the year
* @return boolean
*/
public static boolean isLeapYear(int year) {
return (year % 400 == 0) || ((year % 4 == 0) && (year % 100 != 0));
}
/**
* Return the max day of a mouth.
*
* @param year the year
* @param month the mouth
* @return the max day of the mouth
*/
public static int maxDayOfMonth(int year, int month) {
if (month <= 0 || month > 12) {
return -1;
}
int day = 0;
switch (month) {
case 2:
day = 28;
break;
case 4:
case 6:
case 9:
case 11:
day = 30;
break;
default:
day = 31;
}
if (month == 2 && isLeapYear(year)) {
day++;
}
return day;
}
/**
* Get current the year.
*
* @param date the date {@link Date}
* @return the year {@code int}
*/
public static int year(Date date) {
return getCurrentCalendar(date).get(Calendar.YEAR);
}
/**
* Get the current mouth.
*
* @param date the date {@link Date}
* @return the mouth {@code int}
*/
public static int month(Date date) {
return getCurrentCalendar(date).get(Calendar.MONTH) + 1;
}
/**
* Get the current day.
*
* @param date the date {@link Date}
* @return the day {@code int}
*/
public static int day(Date date) {
return getCurrentCalendar(date).get(Calendar.DATE);
}
/**
* Get the number of the specify date type.
*
* @param date the date {@link Date}
* @param i the specify date type {@link Calendar}
* @return the number of the specify date type
*/
public static int getTimeNumber(Date date, int i) {
return getCurrentCalendar(date).get(i);
}
/**
* Get the number of today in a week
*
* @param date the date {@link Date}
* @return int
*/
public static int week(Date date) {
int week = getCurrentCalendar(date).get(Calendar.DAY_OF_WEEK) - 1;
if (0 == week) {
week = 7;
}
return week;
}
/**
* Get the current quarter of a year
*
* @param date the date {@link Date}
* @return int
*/
public static int getQuarter(Date date) {
return (month(date) - 1) / 3 + 1;
}
/**
* Get the number of days in the current quarter of a year
*
* @param date the date {@link Date}
* @return int
*/
public static int dayOfQuarter(Date date) {
int month = month(date);
int year = year(date);
int day = 0;
for (int i = month - (month - 1) % 3; i < month; i++) {
day += maxDayOfMonth(year, i);
}
day += day(date);
return day;
}
/**
* 返回日期自公元0年开始以来的天数
*
* @param date the date {@link Date}
* @return int
*/
public static int days(Date date) {
int days = 0;
int year = year(date) - 1;
days += year * 365;// one year have 365 day
days += year / 4;// 4 year one leap year
days -= year / 100;// 100 year no leap year
days += year / 400;// 400 year one leap year
days += dayOfYear(date);
return days;
}
/**
* Get the number of today in a year
*
* @param date the date {@link Date}
* @return int
*/
public static int dayOfYear(Date date) {
int month = month(date);
int year = year(date);
int day = 0;
for (int i = 1; i < month; i++) {
day += maxDayOfMonth(year, i);
}
day += day(date);
return day;
}
/**
* Get the {@code String} first day of a mouth
* through the date {@link Date} and the specify number.
*
* @param date the date {@link Date}
* @param n the specify number
* @return the new {@code String}
*/
public static String dateRedMonthBegin(Date date, int n) {
String str = "";
int year = year(date);
int month = month(date);
if (n >= 12) {
int m = n % 12;
int s = n / 12;
month = 12 - m + month;
year = year - s;
} else {
month = month - n;
}
if (month == 0) {
year = year - 1;
month = 12;
}
if (month < 10) {
str = "0" + month;
} else {
str = month + "";
}
return year + "-" + str + "-01";
}
/**
* Get the {@code String} last day of a mouth
* through the date {@link Date} and the specify number.
*
* @param date the date {@link Date}
* @param n the specify number
* @return int
*/
public static String dateRedMonthEnd(Date date, int n) {
String str = "";
int year = year(date);
int month = month(date);
if (n >= 12) {
int m = n % 12;
int s = n / 12;
month = 12 - m + month;
year = year - s;
} else {
month = month - n;
}
if (month == 0) {
year = year - 1;
month = 12;
}
if (month < 10) {
str = "0" + month;
} else {
str = month + "";
}
return year + "-" + str + "-" + maxDayOfMonth(year, month);
}
/**
* Get the new {@link Date}
* through the specify date {@link Date} and the specify date type {@code int}
* and the specify number {@code int}
*
* @param date the date {@link Date}
* @param i the specify date type {@link Calendar}
* @param j the specify number
* @return the new {@link Date}
* @see Calendar#YEAR
* @see Calendar#MONTH
* @see Calendar#WEEK_OF_YEAR
* @see Calendar#DATE
* @see Calendar#HOUR
* @see Calendar#MINUTE
* @see Calendar#SECOND
*/
public static Date getDateByCalendar(Date date, int i, int j) {
Calendar c = getCurrentCalendar(date);
c.add(i, j);
return c.getTime();
}
/**
* {@link Date} convert {@link Calendar}
*
* @param date the date {@link Date}
* @return {@link Calendar}
*/
private static Calendar getCurrentCalendar(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c;
}
/**
* Calculate two date diff
*
* @param startDate the start date
* @param endDate the end date
* @param time the time diff
* @return the {@code long}
* @see #SECOND_TIME
* @see #MINUTE_TIME
* @see #HOUR_TIME
* @see #DAY_TIME
*/
public static long getBetweenDiff(Date startDate, Date endDate, long time) {
long startDateTime = startDate.getTime();
long endDateTime = endDate.getTime();
return (endDateTime - startDateTime) / time;
}
/**
* validate date {@link Date} whether database default date ("1970-01-01 00:00:00)
*
* @param date the date {@link Date}
* @return boolean
*/
public static boolean isDBDefaultDate(Date date) {
if (null == date) {
return false;
}
String dbDefault = format(yyyy_MM_dd_HH_mm_ss, date);
return Constant.DB_DEFAULT_DATE.equals(dbDefault);
}
}
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