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/*
1、< 60s, 显示为“刚刚”
2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”
3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”
4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”
5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”
*/
function timeFormat(time) {
  var date = new Date(time),
    curDate = new Date(),
    year = date.getFullYear(),
    month = date.getMonth() + 1,
    day = date.getDate(),
    hour = date.getHours(),
    minute = date.getMinutes(),
    curYear = curDate.getFullYear(),
    curHour = curDate.getHours(),
    timeStr;

  if (year < curYear) {
    timeStr = year + '年' + month + '月' + day + '日 ' + hour + ':' + minute;
  } else {
    var pastTime = curDate - date,
      pastH = pastTime / 3600000;

    if (pastH > curHour) {
      timeStr = month + '月' + day + '日 ' + hour + ':' + minute;
    } else if (pastH >= 1) {
      timeStr = '今天 ' + hour + ':' + minute + '分';
    } else {
      var pastM = curDate.getMinutes() - minute;
      if (pastM > 1) {
        timeStr = pastM + '分钟前';
      } else {
        timeStr = '刚刚';
      }
    }
  }
  return timeStr;
}