java Dateutil 操作类

Posted 2021-08-29 正怒月神

废话不多说了，直接上代码。

方法内容：

1 yyyy-MM-dd 格式化时间

2 yyyy-MM-dd HH:mm:ss 格式化时间

3 获得年份

4 获得月份

5 获得日期

6 当前时间的加减操作

7 两个时间的差值操作

package com.tenyears.common.utils;

import org.apache.commons.lang3.StringUtils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.ZoneId;
import java.time.temporal.ChronoUnit;
import java.util.Calendar;
import java.util.Date;


public class DateUtil {
	public static SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	public static SimpleDateFormat format2 = new SimpleDateFormat("yyyy-MM-dd");

	public static Date getCurDate() {
		Date currDate = new Date();
		return currDate;
	}

	public static String format(Date date) {
		if (date != null) {
			return format.format(date);
		}
		return null;
	}

	public static String format2(Date date) {
		if (date != null) {
			return format2.format(date);
		}
		return null;
	}

	public static Date parse2(String dateStr) {
		if (StringUtils.isNoneBlank(dateStr))
			try {
				return format2.parse(dateStr);
			} catch (ParseException e) {
				LogerUtil.error(LogerUtil.getPrintStr(e));
			}
		return null;
	}

	public static Date parse(String dateStr) {
		if (StringUtils.isNoneBlank(dateStr))
			try {
				return format.parse(dateStr);
			} catch (ParseException e) {
				LogerUtil.error(LogerUtil.getPrintStr(e));
			}
		return null;
	}

	/**
	 * 
	 * @param date
	 * @return date对应的年
	 */
	public static int getYear(Date date) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
		return calendar.get(Calendar.YEAR);
	}

	public static int getNowYear() {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(new Date());
		return calendar.get(Calendar.YEAR);
	}

	/**
	 * 
	 * @param date
	 * @return date对应的月
	 */
	public static int getMonth(Date date) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
		return calendar.get(Calendar.MONTH) + 1;
	}

	public static int getNowMonth() {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(new Date());
		return calendar.get(Calendar.MONTH) + 1;
	}

	/**
	 * @param date
	 * @return 对应的天
	 */
	public static int getDay(Date date) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
		return calendar.get(Calendar.DAY_OF_MONTH);
	}

	public static int getNowDay() {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(new Date());
		return calendar.get(Calendar.DAY_OF_MONTH);
	}


	/**
	 * 时间加减
	 * @param date 时间
	 * @param calendarType Calendar.Year / Calendar.Month.....
	 * @param value value
	 * @return
	 */
	public static Date add(Date date,int calendarType,int value)
	{
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
		calendar.add(calendarType, value);//当前时间减去一年，即一年前的时间
		return calendar.getTime();//获取一年前的时间，或者一个月前的时间
	}

	/**
	 * 得到两个时间的差值
	 * @param d1
	 * @param d2
	 * @param chronoUnit  ChronoUnit.Year / ChronoUnit.Month....
	 * @return
	 */
	public static long subDate(Date d1,Date d2,ChronoUnit chronoUnit)
	{
		LocalDate afterDate = d1.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		LocalDate beforeDate = d2.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		long diff = chronoUnit.between(beforeDate, afterDate);
		return diff;
	}

	/**
	 * 得到两个时间相减的年数
	 * @param d1
	 * @param d2
	 * @return
	 */
	public static long subYears(Date d1,Date d2)
	{
		LocalDate afterDate = d1.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		LocalDate beforeDate = d2.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		long diff = ChronoUnit.YEARS.between(beforeDate, afterDate);
		return diff;
	}

	/**
	 * 得到两个时间相减的月数
	 * @param d1
	 * @param d2
	 * @return
	 */
	public static long subMonths(Date d1,Date d2)
	{
		LocalDate afterDate = d1.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		LocalDate beforeDate = d2.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		long diff = ChronoUnit.MONTHS.between(beforeDate, afterDate);
		return diff;
	}

	/**
	 * 得到两个时间相减的天数
	 * @param d1
	 * @param d2
	 * @return
	 */
	public static long subDays(Date d1,Date d2)
	{
		LocalDate afterDate = d1.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		LocalDate beforeDate = d2.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		long diff = ChronoUnit.DAYS.between(beforeDate, afterDate);
		return diff;
	}

	/**
	 * 得到两个时间相减的小时数
	 * @param d1
	 * @param d2
	 * @return
	 */
	public static long subHours(Date d1,Date d2)
	{
		LocalDate afterDate = d1.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		LocalDate beforeDate = d2.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		long diff = ChronoUnit.HOURS.between(beforeDate, afterDate);
		return diff;
	}
	/**
	 * 得到两个时间相减的分钟数
	 * @param d1
	 * @param d2
	 * @return
	 */
	public static long subMinutes(Date d1,Date d2)
	{
		LocalDate afterDate = d1.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		LocalDate beforeDate = d2.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		long diff = ChronoUnit.MINUTES.between(beforeDate, afterDate);
		return diff;
	}

	/**
	 * 得到两个时间相减的秒钟数
	 * @param d1
	 * @param d2
	 * @return
	 */
	public static long subSeconds(Date d1,Date d2)
	{
		LocalDate afterDate = d1.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		LocalDate beforeDate = d2.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
		long diff = ChronoUnit.SECONDS.between(beforeDate, afterDate);
		return diff;
	}
}