68 lines
2.4 KiB
Java
68 lines
2.4 KiB
Java
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package com.xinelu.common.utils;
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import com.xinelu.common.exception.ServiceException;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.util.Calendar;
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import java.util.GregorianCalendar;
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/**
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* @author ljh
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* @version 1.0
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* Create by 2023/2/27 11:45
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*/
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public class AgeUtil {
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/**
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* 根据出生日期计算年龄数值
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*
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* @param date 出生日期
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* @return 年龄数值
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*/
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public static Long getAgeMonth(String date) {
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if (StringUtils.isBlank(date)) {
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throw new ServiceException("请输入正确的出生日期！");
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}
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String[] data = StringUtils.split(date, "-");
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if (data.length < 3) {
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throw new ServiceException("请输入正确的出生日期！");
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}
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Calendar birthday = new GregorianCalendar(Integer.parseInt(data[0]), Integer.parseInt(data[1]), Integer.parseInt(data[2]));
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Calendar now = Calendar.getInstance();
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int day = now.get(Calendar.DAY_OF_MONTH) - birthday.get(Calendar.DAY_OF_MONTH);
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//月份从0开始计算，所以需要+1
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int month = now.get(Calendar.MONTH) + 1 - birthday.get(Calendar.MONTH);
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BigDecimal monthFraction;
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int year = now.get(Calendar.YEAR) - birthday.get(Calendar.YEAR);
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//按照减法原理，先day相减，不够向month借；然后month相减，不够向year借；最后year相减。
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if (day < 0) {
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month -= 1;
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//得到上一个月，用来得到上个月的天数。
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now.add(Calendar.MONTH, -1);
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}
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if (month < 0) {
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//当前月份加12个月
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monthFraction = BigDecimal.valueOf(month).add(BigDecimal.valueOf(12)).divide(BigDecimal.valueOf(12), 1, RoundingMode.HALF_UP);
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year--;
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} else {
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//当前月份
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monthFraction = BigDecimal.valueOf(month).divide(BigDecimal.valueOf(12), 1, RoundingMode.HALF_UP);
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}
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BigDecimal bigDecimal = BigDecimal.ZERO;
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if (year >= 0) {
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bigDecimal = bigDecimal.add(BigDecimal.valueOf(year));
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}
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if ((monthFraction.compareTo(BigDecimal.ZERO) > 0)) {
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bigDecimal = bigDecimal.add(monthFraction);
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}
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//今天出生
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if (year == 0 && month == 0 && day == 0) {
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return BigDecimal.ZERO.longValue();
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}
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return Math.round(bigDecimal.doubleValue());
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}
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}
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