lisy
2023-06-16 28b988ca5dc4b51de34c6ebf996579723b2db414
cloud-server-course/src/main/java/com/dsh/course/util/DateUtil.java
@@ -329,4 +329,38 @@
        return dt1.getTime();
    }
    /**
     * 计算年龄
     * @param birthDate
     * @return
     */
    public static int age(Date birthDate) {
        // 当前日历
        Calendar nowCalendar = Calendar.getInstance();
        // 生日大于当前日期
        if (nowCalendar.before(birthDate)) {
            throw new IllegalArgumentException("The birth date is before current time, it's unbelievable");
        }
        // 当前年月日
        int yearNow = nowCalendar.get(Calendar.YEAR);
        int monthNow = nowCalendar.get(Calendar.MONTH);
        int dayNow = nowCalendar.get(Calendar.DAY_OF_MONTH);
        // 出生日期年月日
        Calendar birthCalendar = Calendar.getInstance();
        birthCalendar.setTime(birthDate);
        int yearBirth = birthCalendar.get(Calendar.YEAR);
        int monthBirth = birthCalendar.get(Calendar.MONTH);
        int dayBirth = birthCalendar.get(Calendar.DAY_OF_MONTH);
        // 粗计算年龄
        int age = yearNow - yearBirth;
        // 当前月份小于出生月份年龄减一
        if (monthNow < monthBirth) { age--; }
        // 当前月份等于出生月份,日小于生日年龄减一
        else if (monthNow == monthBirth && dayNow < dayBirth) { age--; }
        // 返回年龄值
        return age;
    }
}