仿微信，QQ聊天页面时间戳的转换

最新推荐文章于 2023-05-30 15:45:16 发布

原创最新推荐文章于 2023-05-30 15:45:16 发布 · 1.7k 阅读

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CC 4.0 BY-SA版权

本文介绍了一个实用的时间戳转换工具类，提供了将时间戳转换为日期字符串及将日期字符串转换回时间戳的方法，并实现了根据不同时间间隔展示友好时间描述的功能。

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//只需要传入时间戳即可

public class DateUtils {


    private static SimpleDateFormat sf = null;

    /*时间戳转换成字符窜*/
    public static String getDateToString(long time) {
        Date d = new Date(time);
        sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return sf.format(d);
    }


    /*将字符串转为时间戳*/
    public static long getStringToDate(String time) {
        sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date = new Date();
        try {
            date = sf.parse(time);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return date.getTime();
    }

    /**
     * 时间戳格式转换
     */
    static String dayNames[] = {"周日", "周一", "周二", "周三", "周四", "周五", "周六"};

    public static String getTime(long timesamp) {
        String result = "";
        Calendar todayCalendar = Calendar.getInstance();
        Calendar otherCalendar = Calendar.getInstance();
        otherCalendar.setTimeInMillis(timesamp);

        String timeFormat = "M月d日 HH:mm";
        String yearTimeFormat = "yyyy年M月d日 HH:mm";
        String am_pm = "";
        int hour = otherCalendar.get(Calendar.HOUR_OF_DAY);
        if (hour >= 0 && hour < 6) {
            am_pm = "凌晨";
        } else if (hour >= 6 && hour < 12) {
            am_pm = "早上";
        } else if (hour == 12) {
            am_pm = "中午";
        } else if (hour > 12 && hour < 18) {
            am_pm = "下午";
        } else if (hour >= 18) {
            am_pm = "晚上";
        }
        timeFormat = "M月d日 " + am_pm + "HH:mm";
        yearTimeFormat = "yyyy年M月d日 " + am_pm + "HH:mm";

        boolean yearTemp = todayCalendar.get(Calendar.YEAR) == otherCalendar.get(Calendar.YEAR);
        if (yearTemp) {
            int todayMonth = todayCalendar.get(Calendar.MONTH);
            int otherMonth = otherCalendar.get(Calendar.MONTH);
            if (todayMonth == otherMonth) {//表示是同一个月
                int temp = todayCalendar.get(Calendar.DATE) - otherCalendar.get(Calendar.DATE);
                switch (temp) {
                    case 0:
                        result = am_pm+getHourAndMin(timesamp);
                        break;
                    case 1:
                        result = "昨天 " +am_pm+ getHourAndMin(timesamp);
                        break;
                    case 2:
                    case 3:
                    case 4:
                    case 5:
                    case 6:
                        int dayOfMonth = otherCalendar.get(Calendar.WEEK_OF_MONTH);
                        int todayOfMonth = todayCalendar.get(Calendar.WEEK_OF_MONTH);
                        if (dayOfMonth == todayOfMonth) {//表示是同一周
                            int dayOfWeek = otherCalendar.get(Calendar.DAY_OF_WEEK);
                            if (dayOfWeek != 1) {//判断当前是不是星期日     如想显示为：周日 12:09 可去掉此判断
                                result = dayNames[otherCalendar.get(Calendar.DAY_OF_WEEK) - 1]+am_pm + getHourAndMin(timesamp);
                            } else {
                                result = getTime(timesamp, timeFormat);
                            }
                        } else {
                            result = getTime(timesamp, timeFormat);
                        }
                        break;
                    default:
                        result = getTime(timesamp, timeFormat);
                        break;
                }
            } else {
                result = getTime(timesamp, timeFormat);
            }
        } else {
            result = getYearTime(timesamp, yearTimeFormat);
        }
        return result;
    }

    /**
     * 当天的显示时间格式
     *
     * @param time
     * @return
     */
    public static String getHourAndMin(long time) {
        SimpleDateFormat format = new SimpleDateFormat("HH:mm");
        return format.format(new Date(time));
    }

    /**
     * 不同一周的显示时间格式
     *
     * @param time
     * @param timeFormat
     * @return
     */
    public static String getTime(long time, String timeFormat) {
        SimpleDateFormat format = new SimpleDateFormat(timeFormat);
        return format.format(new Date(time));
    }

    /**
     * 不同年的显示时间格式
     *
     * @param time
     * @param yearTimeFormat
     * @return
     */
    public static String getYearTime(long time, String yearTimeFormat) {
        SimpleDateFormat format = new SimpleDateFormat(yearTimeFormat);
        return format.format(new Date(time));
    }


}