long类型时间转换成n秒前，n分钟前，n小时前，日期

清疚 2022-07-29 10:55 201阅读 0赞

import java.text.SimpleDateFormat;
    import java.util.Calendar;
    
    import java.text.DateFormat;
    
    import java.util.Date;
    
    /** * Created by Administrator on 2016/3/21. */
    public class LongTimeUtil { 
    
        /** * Long类型的时间转换成：n秒前/n分钟前/n小时前/日期 * * @param time long类型的时间 * @param format 很长时间前显示的日期格式 * @return */
        public static String dataLongToSNS(long time, String format) {
            long now = System.currentTimeMillis();
    
            long diff = now - time;
            diff = diff / 1000;// 秒
    
            if (diff < 0) {
                return dateLongToString(time, format);
            }
    
            if (diff < 30) { // 30秒
                return "刚刚";
            }
    
            if (diff < 60) {
                return String.format("%s秒前", diff);
            }
    
            if (diff < 3600) {
                return String.format("%s分钟前", diff / 60);
            }
            //获取今天凌晨时间
            long todayStart = getMorning(new Date()).getTime();
    
            if (time >= todayStart) {
       // 今天
                return String.format("%s小时前", diff / 3600);
            }
    
            if (time < todayStart && time >= todayStart - 86400000) {
                return "昨天 " + dateLongToString(time, "HH:mm");
            }
            return dateLongToString(time, format);
        }
    
        //获取今天凌晨的时间
        private static Date getMorning(Date date) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.SECOND, 0);
            return calendar.getTime();
        }
    
        public static String dateLongToString(long time) {
            return dateLongToString(time, null);
        }
    
        public static String dateLongToString(long time, String format) {
            if (time <= 0) {
                return "Empty";
            }
            DateFormat format2 = new SimpleDateFormat(format);
            String dateString = format2.format(new Date(time * 1000));//此处一定要记得*1000 否则显示1970年的时间
            return dateString;
        }
    }

上面方法有时候效果不佳，下面特意又封装一个工具类，该类使用时候需要注意要将long类型时间\*1000，否则有时候会显示1970

package king.timeline.com.timeline.utils;
    
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.Locale;
    
    /**
     * Created by Administrator on 2016/3/21.
     */
    public class MyTimeUtil {
        public static String getTime(long time) {
            Calendar newCalendar = Calendar.getInstance();
            Calendar oldCalendar = Calendar.getInstance();
            oldCalendar.setTime(new Date(time));
            if (newCalendar.get(Calendar.YEAR) > oldCalendar.get(Calendar.YEAR)) {
                return getFormatTime(time);
            } else if (newCalendar.get(Calendar.MONTH) > oldCalendar.get(Calendar.MONTH)) {
                return (newCalendar.get(Calendar.MONTH) - oldCalendar.get(Calendar.MONTH)) + "月前";
            } else if (newCalendar.get(Calendar.DAY_OF_MONTH) > oldCalendar.get(Calendar.DAY_OF_MONTH)) {
                return (newCalendar.get(Calendar.DAY_OF_MONTH) - oldCalendar.get(Calendar.DAY_OF_MONTH)) + "天前";
            } else if (newCalendar.get(Calendar.HOUR) > oldCalendar.get(Calendar.HOUR)) {
                return (newCalendar.get(Calendar.HOUR) - oldCalendar.get(Calendar.HOUR)) + "小时前";
            } else if (newCalendar.get(Calendar.MINUTE) > oldCalendar.get(Calendar.MINUTE)) {
                return (newCalendar.get(Calendar.MINUTE) - oldCalendar.get(Calendar.MINUTE)) + "分钟前";
            } else {
                return "刚刚";
            }
        }
    
        private static String getFormatTime(long time) {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault());
            return sdf.format(new Date(time));
        }
    }

![这里写图片描述][20160321225218728]

[20160321225218728]: /images/20220728/5b5f409bb2b14c0ba488fe21dffdd5ab.png