open-JSD-9943/src/main/java/com/fr/plugin/third/party/jsdjjed/util/DateUtil.java

package com.fr.plugin.third.party.jsdjjed.util;

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

/**
 * @Author xx
 * @Date 2020/9/15
 * @Description
 **/
public class DateUtil {

	public static final long ONE_HOUR_TIME_LONG = 3600000;

	public static String toString(Date date, String format) {
		String dateStr = null;
		try {
			SimpleDateFormat sdf = new SimpleDateFormat(format);
			dateStr = sdf.format(date);
		} catch (Exception e) {
		}
		return dateStr;
	}

	public static Date parseDate(String dateStr, String format) {
		Date date = null;
		try {
			SimpleDateFormat sdf = new SimpleDateFormat(format);
			date = sdf.parse(dateStr);
		} catch (Exception e) {
		}
		return date;
	}

	/**
	 * 获取日期当天的最小时间日期,0点
	 */
	public static Date getMinTimeDateByDate(Date date) {
		if (date == null)
			return null;
		String datestr = toString(date, "yyyyMMdd");
		return parseDate(datestr, "yyyyMMdd");
	}

	/**
	 * 获取日期当天的最大时间日期,12点整
	 */
	public static Date getMaxTimeDateByDate(Date date) {
		if (date == null)
			return null;
		String datestr = toString(date, "yyyyMMdd");
		Date d = parseDate(datestr, "yyyyMMdd");
		return new Date(d.getTime() + 24l * 60l * 60l * 1000l - 1l);
	}

	public static long subTime(Date startDate, Date endDate) {
		return endDate.getTime() - startDate.getTime();
	}

	/**
	 * 获取上月第一天最早时间
	 * @return Date
	 */
	public static Date getLastMonthFirstDay() {
		Calendar cal_1 = Calendar.getInstance();// 获取当前日期
		cal_1.setTime(getMinTimeDateByDate(new Date()));
		cal_1.add(Calendar.MONTH, -1);
		cal_1.set(Calendar.DAY_OF_MONTH, 1);
		return cal_1.getTime();
	}

	/**
	 * 获取上月最后一天最晚时间
	 * @return Date
	 */
	public static Date getLastMonthLastDay() {
		Calendar cale = Calendar.getInstance();
		cale.setTime(getMinTimeDateByDate(new Date()));
		cale.add(Calendar.MONTH, -1);
		cale.set(Calendar.DAY_OF_MONTH, cale.getActualMaximum(Calendar.DAY_OF_MONTH));
		return new Date(cale.getTime().getTime() + 1000l * 60l * 60l * 24l - 1l);
	}

	/**
	 * 获取本月第一天最早时间
	 * @return Date
	 */
	public static Date getNowMonthFirstDay() {
		Calendar cal_1 = Calendar.getInstance();// 获取当前日期
		cal_1.setTime(getMinTimeDateByDate(new Date()));
		cal_1.add(Calendar.MONTH, 0);
		cal_1.set(Calendar.DAY_OF_MONTH, 1);
		return cal_1.getTime();
	}

	/**
	 * 获取本月最后一天最晚时间
	 * @return Date
	 */
	public static Date getNowMonthLastDay() {
		Calendar cale = Calendar.getInstance();
		cale.setTime(getMinTimeDateByDate(new Date()));
		cale.set(Calendar.DAY_OF_MONTH, cale.getActualMaximum(Calendar.DAY_OF_MONTH));
		return new Date(cale.getTime().getTime() + 1000l * 60l * 60l * 24l - 1l);
	}

	/**
	 * 获取本月最后一天
	 * @return Date
	 */
	public static Date getTheMonthLastDay(Date date) {
		if(date == null){
			return null;
		}
		Calendar cale = Calendar.getInstance();
		cale.setTime(date);
		cale.set(Calendar.DAY_OF_MONTH, cale.getActualMaximum(Calendar.DAY_OF_MONTH));
		cale.set(Calendar.HOUR, 0);
		cale.set(Calendar.HOUR_OF_DAY, 0);
		cale.set(Calendar.MINUTE, 0);
		cale.set(Calendar.SECOND, 0);
		cale.set(Calendar.MILLISECOND, 0);
		return cale.getTime();
	}



}