DateUtils 工具类
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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;
}
}
/**
* 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"));
}
}
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