关系时间工具类

package cn.ucmed.merger.util;

import org.apache.commons.lang.StringUtils;

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

/**
 * 几秒前，几分钟前，几小时前，几天前，几月前，几年前的实现
 *
 * @author HJH
 * @since 2017-11-17
 **/
public class RelativeDateFormat {

    private static final Long ONE_MINUTE = 60000L;
    private static final Long TEN_MINUTE = 60000L * 10;
    private static final Long ONE_HOUR = 3600000L;
    private static final Long ONE_DAY = 86400000L;
    private static final Long ONE_MONTH = ONE_DAY * 30;
    private static final Long ONE_YEAR = ONE_DAY * 365;

    private static final String JUST_NOW_MSG = "刚才";
    private static final String MINUTE_MSG = "分钟前";
    private static final String HOUR_MSG = "小时前";
    private static final String DAY_MSG = "天前";
    private static final String MONTH_MSG = "个月前";
    private static final String YEAR_MSG = "年前";

    public static String calculateTime(Date date) {
        if (date == null) {
            return null;
        }
        Long delta = System.currentTimeMillis() - date.getTime();
        if (delta < TEN_MINUTE) {
            return JUST_NOW_MSG;
        }
        if (delta < ONE_HOUR) {
            return getMinutesMsg(delta);
        }
        if (delta < ONE_DAY) {
            return getHoursMsg(delta);
        }
        if (delta < ONE_MONTH) {
            return getDayMsg(delta);
        }
        if (delta < ONE_YEAR) {
            return getMonthMsg(delta);
        }
        return getYearMsg(delta);
    }

    public static String calculateWaitTime(String time) {
        if (StringUtils.isBlank(time)) {
            return "-";
        }
        Long delta = Long.parseLong(time);
        String waitTime;
        if (delta < ONE_HOUR) {
            waitTime = getMinutes(delta);
        }else {
            if (delta > ONE_HOUR * 15) {
                delta = ONE_HOUR * 15;
            }
            waitTime = getHoursMsg(delta);
        }
        return waitTime.substring(0, waitTime.length() - 1);
    }

    private static String getMinutes(Long date) {
        Long ten = date / ONE_MINUTE;
        return ten + MINUTE_MSG;
    }

    private static String getMinutesMsg(Long date) {
        Long ten = date / TEN_MINUTE;
        return ten * 10 + MINUTE_MSG;
    }

    private static String getHoursMsg(Long date) {
        Long one = date / ONE_HOUR;
        return one + HOUR_MSG;
    }

    private static String getDayMsg(Long date) {
        Long one = date / ONE_DAY;
        return one + DAY_MSG;
    }

    private static String getMonthMsg(Long date) {
        Long one = date / ONE_MONTH;
        return one + MONTH_MSG;
    }

    private static String getYearMsg(Long date) {
        Long one = date / ONE_YEAR;
        return one + YEAR_MSG;
    }

    private static Long toSeconds(Long date) {
        return date / 1000L;
    }

    private static Long toMinutes(Long date) {
        return toSeconds(date) / 60L;
    }

    private static Long toHours(Long date) {
        return toMinutes(date) / 60L;
    }

    private static Long toDays(Long date) {
        return toHours(date) / 24L;
    }

    private static Long toMonths(Long date) {
        return toDays(date) / 30L;
    }

    private static long toYears(long date) {
        return toMonths(date) / 365L;
    }


    public static void main(String[] args) throws ParseException {

        Date date = new SimpleDateFormat("yyyy-MM-dd").parse("2019-06-09");
        String time = "1574845361000";
        System.out.println(calculateTime(date));
        System.out.println(calculateWaitTime(time));
    }
    
}