关于时间

/**
 * 获取当前时间
 */
public static String getCurrentTime(String format) {
    Date currentTime = new Date();
    SimpleDateFormat formatter = new SimpleDateFormat(format);
    String dateString = formatter.format(currentTime);
    return dateString;
}

 

/**
 * 获取时间 24小时候内 秒 分 钟
 *
 * @param publish_Time
 * @return
 */
public static String getTimeDiff(long publish_Time) {
    long currentTimeMillis = System.currentTimeMillis();
    long diff = 0;
    String str = "";

    diff = currentTimeMillis - publish_Time;
    if (diff > 86400000)// 24 * 60 * 60 * 1000=86400000 毫秒
    {
        Date date = new Date(publish_Time);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(
                "MM-dd HH:mm");
        String time = simpleDateFormat.format(date);
        return time;
    } else {
        if (diff > 3600000) {// 60 * 60 * 1000=3600000 毫秒
            // System.out.println("X小时前");
            str = (int) Math.floor(diff / 3600000f) + "小时";
        } else if (diff > 60000) {// 1 * 60 * 1000=60000 毫秒
            // System.out.println("X分钟前");
            str = (int) Math.floor(diff / 60000) + "分钟";
        } else {
            str = (int) Math.floor(diff / 1000) + "秒";
        }
    }
    return str;
}

/**
 * 将时间戳转为代表"距现在多久之前"的字符串
 *
 * @return
 */
public static String getStandardDate(Long time) {

    StringBuffer sb = new StringBuffer();
    long mill = (long) Math.ceil(time / 1000);//秒前

    long minute = (long) Math.ceil(time / 60 / 1000.0f);// 分钟前

    long hour = (long) Math.ceil(time / 60 / 60 / 1000.0f);// 小时

    long day = (long) Math.ceil(time / 24 / 60 / 60 / 1000.0f);// 天前

    if (day - 1 > 0) {
        sb.append(day + "天");
    } else if (hour - 1 > 0) {
        if (hour >= 24) {
            sb.append("1天");
        } else {
            sb.append(hour + "小时");
        }
    } else if (minute - 1 > 0) {
        if (minute == 60) {
            sb.append("1小时");
        } else {
            sb.append(minute + "分钟");
        }
    } else if (mill - 1 > 0) {
        if (mill == 60) {
            sb.append("1分钟");
        } else {
            sb.append(mill + "秒");
        }
    } else {
        sb.append("刚刚");
    }
    if (!sb.toString().equals("刚刚")) {
        sb.append("前");
    }
    return sb.toString();
}

/**
 * 将时间戳转为代表"日时分秒"的字符串
 *
 * @return
 */
public static String getCommonDate(Long time) {

    StringBuffer sb = new StringBuffer();
    long day = time / (24 * 60 * 60 * 1000);
    if (day > 0)
        sb.append(day + "天");
    long hour = (time / (60 * 60 * 1000) - day * 24);
    if (hour > 0)
        sb.append(hour + "小时");
    long min = ((time / (60 * 1000)) - day * 24 * 60 - hour * 60);
    if (min > 0)
        sb.append(min + "分");
    long s = (time / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
    if (s > 0)
        sb.append(s + "秒");
    return sb.toString();

}

/**
 * 格式化时间
 * @param time
 * @return
 */
public static String getCommonTime(long time) {
    //新的时间
    String newTime = getTime(time, "yyyy-MM-dd HH:mm");
    String year = newTime.substring(0, newTime.indexOf("-"));
    String month = newTime.substring(newTime.indexOf("-") + 1, newTime.lastIndexOf("-"));
    String date = newTime.substring(newTime.lastIndexOf("-") + 1, newTime.lastIndexOf(" "));
    //当前时间
    String currentTime = getCurrentTime("yyyy-MM-dd HH:mm");
    String curretnYear = currentTime.substring(0, currentTime.indexOf("-"));
    String curretnMonth = currentTime.substring(currentTime.indexOf("-") + 1, currentTime.lastIndexOf("-"));
    String currentDate = currentTime.substring(currentTime.lastIndexOf("-") + 1, currentTime.lastIndexOf(" "));
    if (year.equals(curretnYear)) {//年相同
        if (month.equals(curretnMonth)) {//月相同
            if (date.equals(currentDate)) {//日相同
                return "今天 " + newTime.substring(newTime.indexOf(" ") + 1);
            } else {
                int i = Integer.parseInt(currentDate) - Integer.parseInt(date);
                if (i == 1)
                    return "昨天 " + newTime.substring(newTime.indexOf(" ") + 1);
                else
                    return newTime.substring(newTime.indexOf("-")+1);//月相同日不相同}
            }
        } else return newTime.substring(newTime.indexOf("-")+1);
    } else return newTime;

}

/**
 * 得到指定月的天数
 * */
public static int getMonthLastDay(String year, String month)
{
    Calendar a = Calendar.getInstance();
    a.set(Calendar.YEAR, Integer.parseInt(year));
    a.set(Calendar.MONTH, Integer.parseInt(month) - 1);
    a.set(Calendar.DATE, 1);//把日期设置为当月第一天
    a.roll(Calendar.DATE, -1);//日期回滚一天，也就是最后一天
    int maxDate = a.get(Calendar.DATE);
    return maxDate;
}