otb-module/src/utils/time.js

otb-module是基于现有的element-ui库进行的二次封装，简化组件的各自用法，将所有基础组件归纳于一个表单中， 集成表单组件，另还有增删改查的CRUD组件、预览图片/PDF的preview组件、上传文件的upload组件、分页组件与导出组件等等。 引入组件后以数据驱动组件从而加载Dom，让开发变得更简单，让代码更易维护。

export default {
  // 当前日期对象
  initDate(date = new Date()) {
    return {
      year: new Date(date).getFullYear(),
      month: new Date(date).getMonth() + 1,
      day: new Date(date).getDate(),
      hour: new Date(date).getHours(),
      minute: new Date(date).getMinutes(),
      second: new Date(date).getSeconds()
    };
  },
  // 日期格式化方法
  date(date, symbol = "-") {
    date = this.initDate(date);
    date.month = date.month < 10 ? "0" + date.month : date.month;
    date.day = date.day < 10 ? "0" + date.day : date.day;
    return (date.year + symbol + date.month + symbol + date.day);
  },
  // 时间格式化方法
  time(time, symbol = ":") {
    if (time) time = `0 ${time}`
    time = this.initDate(time);
    time.hour = time.hour < 10 ? "0" + time.hour : time.hour;
    time.minute = time.minute < 10 ? "0" + time.minute : time.minute;
    time.second = time.second < 10 ? "0" + time.second : time.second;
    return (time.hour + symbol + time.minute + symbol + time.second);
  },
  // 日期时间格式化方法
  datetime(datetime, symbol = ["-", ":"]) {
    datetime = this.initDate(datetime);
    datetime.month = datetime.month < 10 ? "0" + datetime.month : datetime.month;
    datetime.day = datetime.day < 10 ? "0" + datetime.day : datetime.day;
    datetime.hour = datetime.hour < 10 ? "0" + datetime.hour : datetime.hour;
    datetime.minute = datetime.minute < 10 ? "0" + datetime.minute : datetime.minute;
    datetime.second = datetime.second < 10 ? "0" + datetime.second : datetime.second;

    return (
      datetime.year +
      symbol[0] +
      datetime.month +
      symbol[0] +
      datetime.day +
      " " +
      datetime.hour +
      symbol[1] +
      datetime.minute +
      symbol[1] +
      datetime.second
    );
  },
  // 获取某月天数方法
  monthNumber(date) {
    let year = new Date(date).getFullYear();
    let month = new Date(date).getMonth() + 1;

    return new Date(year, month, 0).getDate();
  },
  // 获取某年天数方法
  yearNumber(n = 0) {
    n = Math.floor(Math.abs(n));
    n = new Date().getFullYear() - n;

    let number = 0;
    for (let i = 1; i <= 12; i++) {
      number += new Date(n, i, 0).getDate();
    }

    return number;
  },
  // 多久以前
  howLongAgo(d = 0, m = 0, y = 0, symbol = ["-", ":"]) {
    d = Math.floor(Math.abs(d));
    m = Math.floor(Math.abs(m));
    y = Math.floor(Math.abs(y));

    let one = 24 * 60 * 60 * 1000;
    let nowTimestamp = new Date().getTime();

    // 按月算多少天
    let month = 0;
    if (m > 0) {
      for (let i = 1; i <= m; i++) {
        month += this.monthNumber(i);
      }
    }
    // 按年算多少天
    let year = 0;
    if (y > 0) {
      for (let i = 1; i <= y; i++) {
        year += this.yearNumber(i);
      }
    }

    let timestamp = nowTimestamp - (d + month + year) * one;

    return this.datetime(timestamp, symbol);
  },
  // 时间数组(日) 最长31 多了没意思
  dayList(params) {
    let list = [];
    let nowDay = new Date().getDate();

    if (params - nowDay >= 0) {
      let outMin = this.monthNumber(1) - (params - nowDay) + 1;
      let outMax = this.monthNumber(1);

      if (outMin - 1 <= 0) {
        let inMin = this.monthNumber(2) + outMin;
        let inMax = this.monthNumber(2);
        for (let i = inMin; i <= inMax; i++) {
          list.push(i);
        }
      }

      for (let i = outMin; i <= outMax; i++) {
        list.push(i);
      }
    }

    for (let i = 1; i <= nowDay; i++) {
      list.push(i);
    }

    return list;
  },
  // 时间戳
  timestamp(date) {
    return new Date(date).getTime()
  },
  // 时间差
  timeDifference(begin, end) {
    let difference = this.timestamp(end) - this.timestamp(begin)
    return Math.abs(difference / (24 * 60 * 60 * 1000)) + 1
  }
};