web_server/src/main/java/thyyxxk/webserver/utils/DateUtil.java

package thyyxxk.webserver.utils;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class DateUtil {

    public static String formatPriceTime(String priceTime) {
        return null == priceTime ? "" : priceTime.split("\\.")[0].replace("T", " ");
    }

    public static String formatDatetime(Date date, String pattern) {
        if (null == date) {
            return "";
        }
        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
        return sdf.format(date);
    }

    public static String formatDatetime(Date date) {
        if (null == date) {
            return "";
        }
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return sdf.format(date);
    }

    public static Date parse(String source) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            return sdf.parse(source);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return new Date();
    }

    public static long getTimestamp(String datetime) throws ParseException {
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return df.parse(datetime).getTime();
    }

    public static String getOffsetDate(int offset){
        DateFormat da = new SimpleDateFormat("yyyy-MM-dd");
        Calendar now = Calendar.getInstance();
        now.set(Calendar.DATE,now.get(Calendar.DATE) + offset);
        return da.format(now.getTime());
    }

    public static String calculateAge(Date birthDate) {
        if (null == birthDate) {
            return "";
        }
        int age;
        Calendar cal = Calendar.getInstance();
        if (cal.before(birthDate)) {
            throw new IllegalArgumentException("出生日期晚于当前时间，无法计算!");
        }
        int yearNow = cal.get(Calendar.YEAR);  //当前年份
        int monthNow = cal.get(Calendar.MONTH);  //当前月份
        int dayOfMonthNow = cal.get(Calendar.DAY_OF_MONTH); //当前日期
        cal.setTime(birthDate);
        int yearBirth = cal.get(Calendar.YEAR);
        int monthBirth = cal.get(Calendar.MONTH);
        int dayOfMonthBirth = cal.get(Calendar.DAY_OF_MONTH);
        age = yearNow - yearBirth;   //计算整岁数
        if (monthNow <= monthBirth) {
            if (monthNow == monthBirth) {
                if (dayOfMonthNow < dayOfMonthBirth) {
                    // 当前日期在生日之前，年龄减一
                    age--;
                }
            } else {
                // 当前月份在生日之前，年龄减一
                age--;
            }
        }
        return String.valueOf(age);
    }
}