parseTime(time, fm) { // 解析时间  time: 时间戳或者实践对象 fm: 格式 默认是{y}-{m}-{d} {h}:{i}:{s}

  if (arguments.length === 0) {

    return null

  }

  const format = fm || '{y}-{m}-{d} {h}:{i}:{s}'

  let date

  if (typeof time === 'object') {

    date = time

  } else {

    if (('' + time).length === 10) time = parseInt(time) * 1000

    date = new Date(time)

  }

  const formatObj = {

    y: date.getFullYear(),

    m: date.getMonth() + 1,

    d: date.getDate(),

    h: date.getHours(),

    i: date.getMinutes(),

    s: date.getSeconds(),

    a: date.getDay()

  }

  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {

    let value = formatObj[key]

    if (key === 'a') return ['一', '二', '三', '四', '五', '六', '日'][value - 1]

    if (result.length > 0 && value < 10) {

      value = '0' + value

    }

    return value || 0

  })

  return time_str

}