增加公共方法，计算年龄，字符串提取小数，map获取字符串及整数

guang

2023-03-20 736fa652cac4a39fb4f2747e581a54a8122b0400

 src/main/java/com/hx/util/DateUtil.java

@@ -780,4 +780,37 @@
        calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
        return calendar.getTime();
    }

    /**
     * 根据出生年月日计算年龄
     * @param birth
     * @return
     */
    public static int getAge(Date birth) {
        Calendar cal = Calendar.getInstance();
        int thisYear = cal.get(Calendar.YEAR);
        int thisMonth = cal.get(Calendar.MONTH);
        int dayOfMonth = cal.get(Calendar.DAY_OF_MONTH);

        cal.setTime(birth);
        int birthYear = cal.get(Calendar.YEAR);
        int birthMonth = cal.get(Calendar.MONTH);
        int birthdayOfMonth = cal.get(Calendar.DAY_OF_MONTH);

        int age = thisYear - birthYear;

        // 未足月
        if (thisMonth <= birthMonth) {
            // 当月
            if (thisMonth == birthMonth) {
                // 未足日
                if (dayOfMonth < birthdayOfMonth) {
                    age--;
                }
            } else {
                age--;
            }
        }
        return age;
    }
}