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Dahua ICC Open API SDK for Java
package com.dahuatech.hutool.core.date;
import com.dahuatech.hutool.core.lang.Assert;
import java.io.Serializable;
import java.util.Calendar;
import java.util.Date;
/**
* 日期间隔
*
* @author Looly
*/
public class DateBetween implements Serializable {
private static final long serialVersionUID = 1L;
/** 开始日期 */
private Date begin;
/** 结束日期 */
private Date end;
/**
* 构造
* 在前的日期做为起始时间,在后的做为结束时间,间隔只保留绝对值正数
*
* @param begin 起始时间
* @param end 结束时间
*/
public DateBetween(Date begin, Date end) {
this(begin, end, true);
}
/**
* 构造
* 在前的日期做为起始时间,在后的做为结束时间
*
* @param begin 起始时间
* @param end 结束时间
* @param isAbs 日期间隔是否只保留绝对值正数
* @since 3.1.1
*/
public DateBetween(Date begin, Date end, boolean isAbs) {
Assert.notNull(begin, "Begin date is null !");
Assert.notNull(end, "End date is null !");
if (isAbs && begin.after(end)) {
// 间隔只为正数的情况下,如果开始日期晚于结束日期,置换之
this.begin = end;
this.end = begin;
} else {
this.begin = begin;
this.end = end;
}
}
/**
* 创建
* 在前的日期做为起始时间,在后的做为结束时间,间隔只保留绝对值正数
*
* @param begin 起始时间
* @param end 结束时间
* @return {@link DateBetween}
* @since 3.2.3
*/
public static DateBetween create(Date begin, Date end) {
return new DateBetween(begin, end);
}
/**
* 创建
* 在前的日期做为起始时间,在后的做为结束时间,间隔只保留绝对值正数
*
* @param begin 起始时间
* @param end 结束时间
* @param isAbs 日期间隔是否只保留绝对值正数
* @return {@link DateBetween}
* @since 3.2.3
*/
public static DateBetween create(Date begin, Date end, boolean isAbs) {
return new DateBetween(begin, end, isAbs);
}
/**
* 判断两个日期相差的时长
* 返回 给定单位的时长差
*
* @param unit 相差的单位:相差 天{@link DateUnit#DAY}、小时{@link DateUnit#HOUR} 等
* @return 时长差
*/
public long between(DateUnit unit) {
long diff = end.getTime() - begin.getTime();
return diff / unit.getMillis();
}
/**
* 计算两个日期相差月数
* 在非重置情况下,如果起始日期的天小于结束日期的天,月数要少算1(不足1个月)
*
* @param isReset 是否重置时间为起始时间(重置天时分秒)
* @return 相差月数
* @since 3.0.8
*/
public long betweenMonth(boolean isReset) {
final Calendar beginCal = DateUtil.calendar(begin);
final Calendar endCal = DateUtil.calendar(end);
final int betweenYear = endCal.get(Calendar.YEAR) - beginCal.get(Calendar.YEAR);
final int betweenMonthOfYear = endCal.get(Calendar.MONTH) - beginCal.get(Calendar.MONTH);
int result = betweenYear * 12 + betweenMonthOfYear;
if (false == isReset) {
endCal.set(Calendar.YEAR, beginCal.get(Calendar.YEAR));
endCal.set(Calendar.MONTH, beginCal.get(Calendar.MONTH));
long between = endCal.getTimeInMillis() - beginCal.getTimeInMillis();
if (between < 0) {
return result - 1;
}
}
return result;
}
/**
* 计算两个日期相差年数
* 在非重置情况下,如果起始日期的月小于结束日期的月,年数要少算1(不足1年)
*
* @param isReset 是否重置时间为起始时间(重置月天时分秒)
* @return 相差年数
* @since 3.0.8
*/
public long betweenYear(boolean isReset) {
final Calendar beginCal = DateUtil.calendar(begin);
final Calendar endCal = DateUtil.calendar(end);
int result = endCal.get(Calendar.YEAR) - beginCal.get(Calendar.YEAR);
if (false == isReset) {
// 考虑闰年的2月情况
if (Calendar.FEBRUARY == beginCal.get(Calendar.MONTH)
&& Calendar.FEBRUARY == endCal.get(Calendar.MONTH)) {
if (beginCal.get(Calendar.DAY_OF_MONTH) == beginCal.getActualMaximum(Calendar.DAY_OF_MONTH)
&& endCal.get(Calendar.DAY_OF_MONTH)
== endCal.getActualMaximum(Calendar.DAY_OF_MONTH)) {
// 两个日期都位于2月的最后一天,此时月数按照相等对待,此时都设置为1号
beginCal.set(Calendar.DAY_OF_MONTH, 1);
endCal.set(Calendar.DAY_OF_MONTH, 1);
}
}
endCal.set(Calendar.YEAR, beginCal.get(Calendar.YEAR));
long between = endCal.getTimeInMillis() - beginCal.getTimeInMillis();
if (between < 0) {
return result - 1;
}
}
return result;
}
/**
* 格式化输出时间差
*
* @param level 级别
* @return 字符串
*/
public String toString(BetweenFormater.Level level) {
return DateUtil.formatBetween(between(DateUnit.MS), level);
}
@Override
public String toString() {
return toString(BetweenFormater.Level.MILLSECOND);
}
}