package com.doumee.core.utils;
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import lombok.Builder;
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import lombok.Data;
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import org.apache.commons.lang3.StringUtils;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.sql.Timestamp;
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import java.text.DateFormat;
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import java.text.DateFormatSymbols;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.time.*;
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import java.time.temporal.ChronoUnit;
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import java.time.temporal.TemporalAdjusters;
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import java.util.Date;
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import java.util.*;
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/**
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* 日期工具类
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* @author: jiangping
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* @date: 2021年7月21日09:27:13
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*/
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@Builder
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@Data
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public class DateCompare {
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private int year;
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private int month;
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private int day;
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private BigDecimal yearFloat;
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private BigDecimal monthFloat;
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private int yearDays ;
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private int monthDays ;
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/**
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* 计算2个日期之间相差的 以年、月、日为单位，各自计算结果是多少
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* 比如：2011-02-02 到 2017-03-02
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* 以年为单位相差为：6年
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* 以月为单位相差为：73个月
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* 以日为单位相差为：2220天
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* @param fromDate
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* @param toDate
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* @return
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*/
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public static DateCompare dayCompare(Date fromDate,Date toDate,Date freeStart,Date freeEnd){
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//开始时间往后延伸，除去有效时期
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fromDate = DateUtil.addDaysToDate(fromDate,getIntersectingDays(fromDate,toDate,freeStart,freeEnd));
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if(toDate.getTime()<= fromDate.getTime()){
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return DateCompare.builder().day(0).month(0).year(0).yearFloat(new BigDecimal(0)).monthFloat(new BigDecimal(0)).build();
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}
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Calendar from = Calendar.getInstance();
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from.setTime(fromDate);
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Calendar to = Calendar.getInstance();
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to.setTime(toDate);
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//只要年月
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int fromYear = from.get(Calendar.YEAR);
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int fromMonth = from.get(Calendar.MONTH);
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int toYear = to.get(Calendar.YEAR);
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int toMonth = to.get(Calendar.MONTH);
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int year = toYear - fromYear;
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int month = toYear * 12 + toMonth - (fromYear * 12 + fromMonth);
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int day = (int) ((to.getTimeInMillis() - from.getTimeInMillis()) / (24 * 3600 * 1000));
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BigDecimal yearFloat = new BigDecimal(year) ;
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BigDecimal monthFloat = new BigDecimal(month) ;
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int yearDays = day - DateUtil.daysBetweenDates(DateUtil.addYearToDate(fromDate,year),fromDate) ;
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if(yearDays>0){
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yearFloat = yearFloat.add(new BigDecimal(yearDays).divide(new BigDecimal(365), 2,RoundingMode.FLOOR));
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}
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int monthDays = day - DateUtil.daysBetweenDates(DateUtil.addMonthToDate(fromDate,month),fromDate) ;
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if(monthDays>0){
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monthFloat = monthFloat.add(new BigDecimal(monthDays).divide(new BigDecimal(30), 2,RoundingMode.FLOOR));
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}
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return DateCompare.builder().day(day).month(month).year(year).yearFloat(yearFloat).monthFloat(monthFloat).yearDays(yearDays).monthDays(monthDays).build();
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}
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public static DateCompare monthYearCompare(Date fromDate,Date toDate ){
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//开始时间往后延伸，除去有效时期
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Calendar from = Calendar.getInstance();
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from.setTime(fromDate);
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Calendar to = Calendar.getInstance();
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to.setTime(toDate);
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//只要年月
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int fromYear = from.get(Calendar.YEAR);
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int fromMonth = from.get(Calendar.MONTH);
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int toYear = to.get(Calendar.YEAR);
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int toMonth = to.get(Calendar.MONTH);
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int year = toYear - fromYear;
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int month = toYear * 12 + toMonth - (fromYear * 12 + fromMonth);
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int day = (int) ((to.getTimeInMillis() - from.getTimeInMillis()) / (24 * 3600 * 1000));
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BigDecimal yearFloat = new BigDecimal(year) ;
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BigDecimal monthFloat = new BigDecimal(month) ;
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int yearDays = day - DateUtil.daysBetweenDates(DateUtil.addYearToDate(fromDate,year),fromDate) ;
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if(yearDays>0){
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yearFloat = yearFloat.add(new BigDecimal(yearDays).divide(new BigDecimal(365), 2,RoundingMode.FLOOR));
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}
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int monthDays = day - DateUtil.daysBetweenDates(DateUtil.addMonthToDate(fromDate,month),fromDate) ;
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if(monthDays>0){
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monthFloat = monthFloat.add(new BigDecimal(monthDays).divide(new BigDecimal(30), 2,RoundingMode.FLOOR));
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}
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return DateCompare.builder().day(day).month(month).year(year).yearFloat(yearFloat).monthFloat(monthFloat).yearDays(yearDays).monthDays(monthDays).build();
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}
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public static int getIntersectingDays(Date start1, Date end1, Date start2, Date end2) {
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Date earlierStart = DateUtil.daysBetweenDates(start1,start2)>0? start1 : start2;
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Date laterEnd = DateUtil.daysBetweenDates(end2,end1)>0 ? end1 : end2;
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int days =DateUtil.daysBetweenDates(laterEnd,earlierStart );
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return days>0?days:0 ;
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}
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}
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